mirror of
https://github.com/torvalds/linux.git
synced 2026-10-07 22:37:45 -04:00
1f24cd31c28178415158366b676c2e18be812940
161
Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 Leo Yan
|
4a88c4ec3c |
perf arm64: Add missing -I for tools/arch/arm64/include/ to find asm/sysreg.h when building arm_spe.h
This cures a current problem where tools/perf/util/arm-spe.c isn't finding a ARM64 specific asm header, so lets add it for now to make progress. Adding a .o specific rule seems clunky, lets try and find if this is really the right solution. Signed-off-by: Leo Yan <[email protected]> Reported-by: Suzuki K Poulose <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Anshuman Khandual <[email protected]> Cc: Will Deacon <[email protected]> Cc: James Morse <[email protected]> Link: https://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
9b7c7728f4 |
perf parse-events: Break out tracepoint and printing
Move print_*_events functions out of parse-events.c into a new print-events.c. Move tracepoint code into tracepoint.c or trace-event-info.c (sole user). This reduces the dependencies of parse-events.c and makes it more amenable to being a library in the future. Remove some unnecessary definitions from parse-events.h. Fix a checkpatch.pl warning on using unsigned rather than unsigned int. Fix some line length warnings too. Signed-off-by: Ian Rogers <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: https://lore.kernel.org/r/[email protected] [ Add include linux/stddef.h before perf_events.h for systems where __always_inline isn't pulled in before used, such as older Alpine Linux ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Namhyung Kim
|
407b36f69e |
perf lock: Use BPF for lock contention analysis
Add -b/--use-bpf option to use BPF to collect lock contention stats.
For simplicity it now runs system-wide and requires C-c to stop.
Upcoming changes will add the usual filtering.
$ sudo perf lock con -b
^C
contended total wait max wait avg wait type caller
42 192.67 us 13.64 us 4.59 us spinlock queue_work_on+0x20
23 85.54 us 10.28 us 3.72 us spinlock worker_thread+0x14a
6 13.92 us 6.51 us 2.32 us mutex kernfs_iop_permission+0x30
3 11.59 us 10.04 us 3.86 us mutex kernfs_dop_revalidate+0x3c
1 7.52 us 7.52 us 7.52 us spinlock kthread+0x115
1 7.24 us 7.24 us 7.24 us rwlock:W sys_epoll_wait+0x148
2 7.08 us 3.99 us 3.54 us spinlock delayed_work_timer_fn+0x1b
1 6.41 us 6.41 us 6.41 us spinlock idle_balance+0xa06
2 2.50 us 1.83 us 1.25 us mutex kernfs_iop_lookup+0x2f
1 1.71 us 1.71 us 1.71 us mutex kernfs_iop_getattr+0x2c
Signed-off-by: Namhyung Kim <[email protected]>
Cc: Blake Jones <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Waiman Long <[email protected]>
Cc: Will Deacon <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Yang Jihong
|
daf07d2207 |
perf kwork: Implement BPF trace
'perf record' generates perf.data, which generates extra interrupts
for hard disk, amount of data to be collected increases with time.
Using eBPF trace can process the data in kernel, which solves the
preceding two problems.
Add -b/--use-bpf option for latency and report to support
tracing kwork events using eBPF:
1. Create bpf prog and attach to tracepoints,
2. Start tracing after command is entered,
3. After user hit "ctrl+c", stop tracing and report,
4. Support CPU and name filtering.
This commit implements the framework code and
does not add specific event support.
Test cases:
# perf kwork rep -h
Usage: perf kwork report [<options>]
-b, --use-bpf Use BPF to measure kwork runtime
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): runtime, max, count
-S, --with-summary Show summary with statistics
--time <str> Time span for analysis (start,stop)
# perf kwork lat -h
Usage: perf kwork latency [<options>]
-b, --use-bpf Use BPF to measure kwork latency
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): avg, max, count
--time <str> Time span for analysis (start,stop)
# perf kwork lat -b
Unsupported bpf trace class irq
# perf kwork rep -b
Unsupported bpf trace class irq
Signed-off-by: Yang Jihong <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Clarke <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Simplify work_findnew() ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Namhyung Kim
|
edc41a1099 |
perf record: Enable off-cpu analysis with BPF
Add --off-cpu option to enable the off-cpu profiling with BPF. It'd
use a bpf_output event and rename it to "offcpu-time". Samples will
be synthesized at the end of the record session using data from a BPF
map which contains the aggregated off-cpu time at context switches.
So it needs root privilege to get the off-cpu profiling.
Each sample will have a separate user stacktrace so it will skip
kernel threads. The sample ip will be set from the stacktrace and
other sample data will be updated accordingly. Currently it only
handles some basic sample types.
The sample timestamp is set to a dummy value just not to bother with
other events during the sorting. So it has a very big initial value
and increase it on processing each samples.
Good thing is that it can be used together with regular profiling like
cpu cycles. If you don't want to that, you can use a dummy event to
enable off-cpu profiling only.
Example output:
$ sudo perf record --off-cpu perf bench sched messaging -l 1000
$ sudo perf report --stdio --call-graph=no
# Total Lost Samples: 0
#
# Samples: 41K of event 'cycles'
# Event count (approx.): 42137343851
...
# Samples: 1K of event 'offcpu-time'
# Event count (approx.): 587990831640
#
# Children Self Command Shared Object Symbol
# ........ ........ ............... .................. .........................
#
81.66% 0.00% sched-messaging libc-2.33.so [.] __libc_start_main
81.66% 0.00% sched-messaging perf [.] cmd_bench
81.66% 0.00% sched-messaging perf [.] main
81.66% 0.00% sched-messaging perf [.] run_builtin
81.43% 0.00% sched-messaging perf [.] bench_sched_messaging
40.86% 40.86% sched-messaging libpthread-2.33.so [.] __read
37.66% 37.66% sched-messaging libpthread-2.33.so [.] __write
2.91% 2.91% sched-messaging libc-2.33.so [.] __poll
...
As you can see it spent most of off-cpu time in read and write in
bench_sched_messaging(). The --call-graph=no was added just to make
the output concise here.
It uses perf hooks facility to control BPF program during the record
session rather than adding new BPF/off-cpu specific calls.
Signed-off-by: Namhyung Kim <[email protected]>
Acked-by: Ian Rogers <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Blake Jones <[email protected]>
Cc: Hao Luo <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Milian Wolff <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Song Liu <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Ian Rogers
|
9d31d18bbb |
perf maps: Move maps code to own C file
The maps code has its own header, move the corresponding C function definitions to their own C file. In the process tidy and minimize includes. Committer notes: Add back the 'static' for maps__init() and maps__exit(). Signed-off-by: Ian Rogers <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Alexey Bayduraev <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Andrew Morton <[email protected]> Cc: André Almeida <[email protected]> Cc: Andy Shevchenko <[email protected]> Cc: Darren Hart <[email protected]> Cc: Davidlohr Bueso <[email protected]> Cc: Dmitriy Vyukov <[email protected]> Cc: Eric Dumazet <[email protected]> Cc: German Gomez <[email protected]> Cc: Hao Luo <[email protected]> Cc: James Clark <[email protected]> Cc: Jin Yao <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: John Garry <[email protected]> Cc: Kajol Jain <[email protected]> Cc: Kan Liang <[email protected]> Cc: Leo Yan <[email protected]> Cc: Madhavan Srinivasan <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Miaoqian Lin <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Riccardo Mancini <[email protected]> Cc: Shunsuke Nakamura <[email protected]> Cc: Song Liu <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Stephen Brennan <[email protected]> Cc: Steven Rostedt (VMware) <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Thomas Richter <[email protected]> Cc: Yury Norov <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Alexandre Truong
|
b9f6fbb3b2 |
perf arm64: Inject missing frames when using 'perf record --call-graph=fp'
When unwinding using frame pointers on ARM64, the return address of the
current function may not have been pushed into the stack when a function
was interrupted, which makes perf show an incorrect call graph to the
user.
Consider the following example program:
void leaf() {
/* long computation */
}
void parent() {
// (1)
leaf();
// (2)
}
... could be compiled into (using gcc -fno-inline -fno-omit-frame-pointer):
leaf:
/* long computation */
nop
ret
parent:
// (1)
stp x29, x30, [sp, -16]!
mov x29, sp
bl parent
nop
ldp x29, x30, [sp], 16
// (2)
ret
If the program is interrupted at (1), (2), or any point in "leaf:", the
call graph will skip the callers of the current function. We can unwind
using the dwarf info and check if the return addr is the same as the LR
register, and inject the missing frame into the call graph.
Before this patch, the above example shows the following call-graph when
recording using "--call-graph fp" mode in ARM64:
# Children Self Command Shared Object Symbol
# ........ ........ ........ ................ ......................
#
99.86% 99.86% program3 program3 [.] leaf
|
---_start
__libc_start_main
main
leaf
As can be seen, the "parent" function is missing. This is specially
problematic in "leaf" because for leaf functions the compiler may always
omit pushing the return addr into the stack. After this patch, it shows
the correct graph:
# Children Self Command Shared Object Symbol
# ........ ........ ........ ................ ......................
#
99.86% 99.86% program3 program3 [.] leaf
|
---_start
__libc_start_main
main
parent
leaf
Reviewed-by: James Clark <[email protected]>
Signed-off-by: Alexandre Truong <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: John Garry <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mathieu Poirier <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: German Gomez <[email protected]>
[ Rename machine__normalize_is() to machine__normalized_is(), as suggested by James Clark ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Namhyung Kim
|
177f4eac7f |
perf ftrace: Add -b/--use-bpf option for latency subcommand
The -b/--use-bpf option is to use BPF to get latency info of kernel
functions. It'd have better performance impact and I observed that
latency of same function is smaller than before when using BPF.
Committer testing:
# strace -e bpf perf ftrace latency -b -T __handle_mm_fault -a sleep 1
bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SOCKET_FILTER, insn_cnt=2, insns=0x7fff51914e00, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=0, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0}, 128) = 3
bpf(BPF_BTF_LOAD, {btf="\237\353\1\0\30\0\0\0\0\0\0\0\20\0\0\0\20\0\0\0\5\0\0\0\1\0\0\0\0\0\0\1"..., btf_log_buf=NULL, btf_size=45, btf_log_size=0, btf_log_level=0}, 128) = 3
bpf(BPF_BTF_LOAD, {btf="\237\353\1\0\30\0\0\0\0\0\0\0000\0\0\0000\0\0\0\t\0\0\0\1\0\0\0\0\0\0\1"..., btf_log_buf=NULL, btf_size=81, btf_log_size=0, btf_log_level=0}, 128) = 3
bpf(BPF_BTF_LOAD, {btf="\237\353\1\0\30\0\0\0\0\0\0\08\0\0\08\0\0\0\t\0\0\0\0\0\0\0\0\0\0\1"..., btf_log_buf=NULL, btf_size=89, btf_log_size=0, btf_log_level=0}, 128) = 3
bpf(BPF_BTF_LOAD, {btf="\237\353\1\0\30\0\0\0\0\0\0\0\f\0\0\0\f\0\0\0\7\0\0\0\1\0\0\0\0\0\0\20"..., btf_log_buf=NULL, btf_size=43, btf_log_size=0, btf_log_level=0}, 128) = 3
bpf(BPF_BTF_LOAD, {btf="\237\353\1\0\30\0\0\0\0\0\0\0000\0\0\0000\0\0\0\t\0\0\0\1\0\0\0\0\0\0\1"..., btf_log_buf=NULL, btf_size=81, btf_log_size=0, btf_log_level=0}, 128) = 3
bpf(BPF_BTF_LOAD, {btf="\237\353\1\0\30\0\0\0\0\0\0\0000\0\0\0000\0\0\0\5\0\0\0\0\0\0\0\0\0\0\1"..., btf_log_buf=NULL, btf_size=77, btf_log_size=0, btf_log_level=0}, 128) = -1 EINVAL (Invalid argument)
bpf(BPF_BTF_LOAD, {btf="\237\353\1\0\30\0\0\0\0\0\0\0\350\2\0\0\350\2\0\0\353\2\0\0\0\0\0\0\0\0\0\2"..., btf_log_buf=NULL, btf_size=1515, btf_log_size=0, btf_log_level=0}, 128) = 3
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_ARRAY, key_size=4, value_size=32, max_entries=1, map_flags=0, inner_map_fd=0, map_name="", map_ifindex=0, btf_fd=0, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0}, 128) = 4
bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SOCKET_FILTER, insn_cnt=5, insns=0x7fff51914c30, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=0, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0}, 128) = 5
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_ARRAY, key_size=4, value_size=4, max_entries=1, map_flags=BPF_F_MMAPABLE, inner_map_fd=0, map_name="", map_ifindex=0, btf_fd=0, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0}, 128) = 4
bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SOCKET_FILTER, insn_cnt=2, insns=0x7fff51914a80, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="test", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=0, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0}, 128) = 4
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_HASH, key_size=8, value_size=8, max_entries=10000, map_flags=0, inner_map_fd=0, map_name="functime", map_ifindex=0, btf_fd=3, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0}, 128) = 4
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_HASH, key_size=4, value_size=1, max_entries=1, map_flags=0, inner_map_fd=0, map_name="cpu_filter", map_ifindex=0, btf_fd=3, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0}, 128) = 5
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_HASH, key_size=4, value_size=1, max_entries=1, map_flags=0, inner_map_fd=0, map_name="task_filter", map_ifindex=0, btf_fd=3, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0}, 128) = 7
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_PERCPU_ARRAY, key_size=4, value_size=8, max_entries=22, map_flags=0, inner_map_fd=0, map_name="latency", map_ifindex=0, btf_fd=3, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0}, 128) = 8
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_ARRAY, key_size=4, value_size=4, max_entries=1, map_flags=BPF_F_MMAPABLE, inner_map_fd=0, map_name="func_lat.bss", map_ifindex=0, btf_fd=3, btf_key_type_id=0, btf_value_type_id=30, btf_vmlinux_value_type_id=0}, 128) = 9
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=9, key=0x7fff51914c40, value=0x7f6e99be2000, flags=BPF_ANY}, 128) = 0
bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_KPROBE, insn_cnt=18, insns=0x11e4160, license="", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(5, 14, 16), prog_flags=0, prog_name="func_begin", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=3, func_info_rec_size=8, func_info=0x11dfc50, func_info_cnt=1, line_info_rec_size=16, line_info=0x11e04c0, line_info_cnt=9, attach_btf_id=0, attach_prog_fd=0}, 128) = 10
bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_KPROBE, insn_cnt=99, insns=0x11ded70, license="", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(5, 14, 16), prog_flags=0, prog_name="func_end", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=3, func_info_rec_size=8, func_info=0x11dfc70, func_info_cnt=1, line_info_rec_size=16, line_info=0x11f6e10, line_info_cnt=20, attach_btf_id=0, attach_prog_fd=0}, 128) = 11
bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_TRACEPOINT, insn_cnt=2, insns=0x7fff51914a80, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=0, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0}, 128) = 13
bpf(BPF_LINK_CREATE, {link_create={prog_fd=13, target_fd=-1, attach_type=0x29 /* BPF_??? */, flags=0}}, 128) = -1 EINVAL (Invalid argument)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1699992, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
bpf(BPF_MAP_LOOKUP_ELEM, {map_fd=8, key=0x7fff51914f84, value=0x11f6fa0, flags=BPF_ANY}, 128) = 0
# DURATION | COUNT | GRAPH |
0 - 1 us | 52 | ################### |
1 - 2 us | 36 | ############# |
2 - 4 us | 24 | ######### |
4 - 8 us | 7 | ## |
8 - 16 us | 1 | |
16 - 32 us | 0 | |
32 - 64 us | 0 | |
64 - 128 us | 0 | |
128 - 256 us | 0 | |
256 - 512 us | 0 | |
512 - 1024 us | 0 | |
1 - 2 ms | 0 | |
2 - 4 ms | 0 | |
4 - 8 ms | 0 | |
8 - 16 ms | 0 | |
16 - 32 ms | 0 | |
32 - 64 ms | 0 | |
64 - 128 ms | 0 | |
128 - 256 ms | 0 | |
256 - 512 ms | 0 | |
512 - 1024 ms | 0 | |
1 - ... s | 0 | |
+++ exited with 0 +++
#
Signed-off-by: Namhyung Kim <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Athira Jajeev <[email protected]>
Cc: Changbin Du <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Song Liu <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Add missing util/cpumap.h include and removed unused 'fd' variable ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Dave Marchevsky
|
6ac22d036f |
perf bpf: Pull in bpf_program__get_prog_info_linear()
To prepare for impending deprecation of libbpf's bpf_program__get_prog_info_linear(), pull in the function and associated helpers into the perf codebase and migrate existing uses to the perf copy. Since libbpf's deprecated definitions will still be visible to perf, it is necessary to rename perf's definitions. Signed-off-by: Dave Marchevsky <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Acked-by: Song Liu <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Daniel Borkmann <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
92ec3cc94c |
tools lib: Adopt list_sort() from the kernel sources
Add list_sort.[ch] from the main kernel tree. The linux/bug.h #include is removed due to conflicting definitions. Add check-headers and modify perf build accordingly. MANIFEST and python-ext-sources fixes suggested by Arnaldo. Suggested-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Ian Rogers <[email protected]> Acked-by: Andi Kleen <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Antonov <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andrew Kilroy <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Changbin Du <[email protected]> Cc: Denys Zagorui <[email protected]> Cc: Fabian Hemmer <[email protected]> Cc: Felix Fietkau <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jacob Keller <[email protected]> Cc: Jiapeng Chong <[email protected]> Cc: Jin Yao <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Joakim Zhang <[email protected]> Cc: John Garry <[email protected]> Cc: Kajol Jain <[email protected]> Cc: Kan Liang <[email protected]> Cc: Kees Kook <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Nicholas Fraser <[email protected]> Cc: Nick Desaulniers <[email protected]> Cc: Paul Clarke <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Riccardo Mancini <[email protected]> Cc: Sami Tolvanen <[email protected]> Cc: ShihCheng Tu <[email protected]> Cc: Song Liu <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Sumanth Korikkar <[email protected]> Cc: Thomas Richter <[email protected]> Cc: Wan Jiabing <[email protected]> Cc: Zhen Lei <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Kim Phillips
|
291dcb98d7 |
perf report: Add support to print a textual representation of IBS raw sample data
Perf records IBS (Instruction Based Sampling) extra sample data when 'perf record --raw-samples' is used with an IBS-compatible event, on a machine that supports IBS. IBS support is indicated in CPUID_Fn80000001_ECX bit #10. Up until now, users have been able to see the extra sample data solely in raw hex format using 'perf report --dump-raw-trace'. From there, users could decode the data either manually, or by using an external script. Enable the built-in 'perf report --dump-raw-trace' to do the decoding of the extra sample data bits, so manual or external script decoding isn't necessary. Example usage: $ sudo perf record -c 10000001 -a --raw-samples -e ibs_fetch/rand_en=1/,ibs_op/cnt_ctl=1/ -C 0,1 taskset -c 0,1 7za b -mmt2 | perf report --dump-raw-trace Stdout contains IBS Fetch samples, e.g.: ibs_fetch_ctl: 02170007ffffffff MaxCnt 1048560 Cnt 1048560 Lat 7 En 1 Val 1 Comp 1 IcMiss 0 PhyAddrValid 1 L1TlbPgSz 4KB L1TlbMiss 0 L2TlbMiss 0 RandEn 1 L2Miss 0 IbsFetchLinAd: 000056016b2ead40 IbsFetchPhysAd: 000000115cedfd40 c_ibs_ext_ctl: 0000000000000000 IbsItlbRefillLat 0 ..and IBS Op samples, e.g.: ibs_op_ctl: 0000009e009e8968 MaxCnt 10000000 En 1 Val 1 CntCtl 1=uOps CurCnt 158 IbsOpRip: 000056016b2ea73d ibs_op_data: 00000000000b0002 CompToRetCtr 2 TagToRetCtr 11 BrnRet 0 RipInvalid 0 BrnFuse 0 Microcode 0 ibs_op_data2: 0000000000000002 CacheHitSt 0=M-state RmtNode 0 DataSrc 2=Local node cache ibs_op_data3: 0000000000c60002 LdOp 0 StOp 1 DcL1TlbMiss 0 DcL2TlbMiss 0 DcL1TlbHit2M 0 DcL1TlbHit1G 0 DcL2TlbHit2M 0 DcMiss 0 DcMisAcc 0 DcWcMemAcc 0 DcUcMemAcc 0 DcLockedOp 0 DcMissNoMabAlloc 0 DcLinAddrValid 1 DcPhyAddrValid 1 DcL2TlbHit1G 0 L2Miss 0 SwPf 0 OpMemWidth 4 bytes OpDcMissOpenMemReqs 0 DcMissLat 0 TlbRefillLat 0 IbsDCLinAd: 00007f133c319ce0 IbsDCPhysAd: 0000000270485ce0 Committer notes: Fixed up this: util/amd-sample-raw.c: In function ‘evlist__amd_sample_raw’: util/amd-sample-raw.c:125:42: error: ‘ bytes’ directive output may be truncated writing 6 bytes into a region of size between 4 and 7 [-Werror=format-truncation=] 125 | " OpMemWidth %2d bytes", 1 << (reg.op_mem_width - 1)); | ^~~~~~ In file included from /usr/include/stdio.h:866, from util/amd-sample-raw.c:7: /usr/include/bits/stdio2.h:71:10: note: ‘__builtin___snprintf_chk’ output between 21 and 24 bytes into a destination of size 21 71 | return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 72 | __glibc_objsize (__s), __fmt, | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 73 | __va_arg_pack ()); | ~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors As that %2d won't limit the number of chars to 2, just state that 2 is the minimal width: $ cat printf.c #include <stdio.h> #include <stdlib.h> int main(int argc, char *argv[]) { char bf[64]; int len = snprintf(bf, sizeof(bf), "%2d", atoi(argv[1])); printf("strlen(%s): %u\n", bf, len); return 0; } $ ./printf 1 strlen( 1): 2 $ ./printf 12 strlen(12): 2 $ ./printf 123 strlen(123): 3 $ ./printf 1234 strlen(1234): 4 $ ./printf 12345 strlen(12345): 5 $ ./printf 123456 strlen(123456): 6 $ And since we probably don't want that output to be truncated, just assume the worst case, as the compiler did, and add a few more chars to that buffer. Also use sizeof(var) instead of sizeof(dup-of-wanted-format-string) to avoid bugs when changing one but not the other. I also had to change this: -#include <asm/amd-ibs.h> +#include "../../arch/x86/include/asm/amd-ibs.h" To make it build on other architectures, just like intel-pt does. Signed-off-by: Kim Phillips <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Ian Rogers <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Joao Martins <[email protected]> Cc: Konrad Rzeszutek Wilk <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Michael Petlan <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Robert Richter <[email protected]> Cc: Stephane Eranian <[email protected]> Link: https //lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Namhyung Kim
|
944138f048 |
perf stat: Enable BPF counter with --for-each-cgroup
Recently bperf was added to use BPF to count perf events for various purposes. This is an extension for the approach and targetting to cgroup usages. Unlike the other bperf, it doesn't share the events with other processes but it'd reduce unnecessary events (and the overhead of multiplexing) for each monitored cgroup within the perf session. When --for-each-cgroup is used with --bpf-counters, it will open cgroup-switches event per cpu internally and attach the new BPF program to read given perf_events and to aggregate the results for cgroups. It's only called when task is switched to a task in a different cgroup. Signed-off-by: Namhyung Kim <[email protected]> Acked-by: Song Liu <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Ian Rogers <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Adrian Hunter
|
291961fc3c |
perf script: Add API for filtering via dynamically loaded shared object
In some cases, users want to filter very large amounts of data (e.g. from AUX area tracing like Intel PT) looking for something specific. While scripting such as Python can be used, Python is 10 to 20 times slower than C. So define a C API so that custom filters can be written and loaded. Signed-off-by: Adrian Hunter <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Kan Liang <[email protected]> Cc: Leo Yan <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Denys Zagorui
|
6793672acc |
perf parse-events: Add bison --file-prefix-map option
During a perf build with O= bison stores full paths in generated files and those paths are stored in resulting perf binary. Starting from bison v3.7.1 those paths can be remapped by using the --file-prefix-map option. Use this option if possible to make perf binary more reproducible. Signed-off-by: Denys Zagorui <[email protected]> Acked-by: Jiri Olsa <[email protected]> Acked-by: Namhyung Kim <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Jiri Olsa
|
ad1237c30d |
perf tools: Fix dynamic libbpf link
Justin reported broken build with LIBBPF_DYNAMIC=1.
When linking libbpf dynamically we need to use perf's
hashmap object, because it's not exported in libbpf.so
(only in libbpf.a).
Following build is now passing:
$ make LIBBPF_DYNAMIC=1
BUILD: Doing 'make -j8' parallel build
...
$ ldd perf | grep libbpf
libbpf.so.0 => /lib64/libbpf.so.0 (0x00007fa7630db000)
Fixes:
|
||
|
Jin Yao
|
b53a0755d5 |
perf record: Create two hybrid 'cycles' events by default
When evlist is empty, for example no '-e' specified in perf record,
one default 'cycles' event is added to evlist.
While on hybrid platform, it needs to create two default 'cycles'
events. One is for cpu_core, the other is for cpu_atom.
This patch actually calls evsel__new_cycles() two times to create
two 'cycles' events.
# ./perf record -vv -a -- sleep 1
...
------------------------------------------------------------
perf_event_attr:
size 120
config 0x400000000
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|ID|CPU|PERIOD
read_format ID
disabled 1
inherit 1
freq 1
precise_ip 3
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 5
sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 = 6
sys_perf_event_open: pid -1 cpu 2 group_fd -1 flags 0x8 = 7
sys_perf_event_open: pid -1 cpu 3 group_fd -1 flags 0x8 = 9
sys_perf_event_open: pid -1 cpu 4 group_fd -1 flags 0x8 = 10
sys_perf_event_open: pid -1 cpu 5 group_fd -1 flags 0x8 = 11
sys_perf_event_open: pid -1 cpu 6 group_fd -1 flags 0x8 = 12
sys_perf_event_open: pid -1 cpu 7 group_fd -1 flags 0x8 = 13
sys_perf_event_open: pid -1 cpu 8 group_fd -1 flags 0x8 = 14
sys_perf_event_open: pid -1 cpu 9 group_fd -1 flags 0x8 = 15
sys_perf_event_open: pid -1 cpu 10 group_fd -1 flags 0x8 = 16
sys_perf_event_open: pid -1 cpu 11 group_fd -1 flags 0x8 = 17
sys_perf_event_open: pid -1 cpu 12 group_fd -1 flags 0x8 = 18
sys_perf_event_open: pid -1 cpu 13 group_fd -1 flags 0x8 = 19
sys_perf_event_open: pid -1 cpu 14 group_fd -1 flags 0x8 = 20
sys_perf_event_open: pid -1 cpu 15 group_fd -1 flags 0x8 = 21
------------------------------------------------------------
perf_event_attr:
size 120
config 0x800000000
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|ID|CPU|PERIOD
read_format ID
disabled 1
inherit 1
freq 1
precise_ip 3
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 16 group_fd -1 flags 0x8 = 22
sys_perf_event_open: pid -1 cpu 17 group_fd -1 flags 0x8 = 23
sys_perf_event_open: pid -1 cpu 18 group_fd -1 flags 0x8 = 24
sys_perf_event_open: pid -1 cpu 19 group_fd -1 flags 0x8 = 25
sys_perf_event_open: pid -1 cpu 20 group_fd -1 flags 0x8 = 26
sys_perf_event_open: pid -1 cpu 21 group_fd -1 flags 0x8 = 27
sys_perf_event_open: pid -1 cpu 22 group_fd -1 flags 0x8 = 28
sys_perf_event_open: pid -1 cpu 23 group_fd -1 flags 0x8 = 29
------------------------------------------------------------
We have to create evlist-hybrid.c otherwise due to the symbol
dependency the perf test python would be failed.
Signed-off-by: Jin Yao <[email protected]>
Reviewed-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Jin Yao
|
9cbfa2f64c |
perf parse-events: Create two hybrid hardware events
Current hardware events has special perf types PERF_TYPE_HARDWARE.
But it doesn't pass the PMU type in the user interface. For a hybrid
system, the perf kernel doesn't know which PMU the events belong to.
So now this type is extended to be PMU aware type. The PMU type ID
is stored at attr.config[63:32].
PMU type ID is retrieved from sysfs.
root@lkp-adl-d01:/sys/devices/cpu_atom# cat type
8
root@lkp-adl-d01:/sys/devices/cpu_core# cat type
4
When enabling a hybrid hardware event without specified pmu, such as,
'perf stat -e cycles -a', two events are created automatically. One
is for atom, the other is for core.
# perf stat -e cycles -a -vv -- sleep 1
Control descriptor is not initialized
------------------------------------------------------------
perf_event_attr:
size 120
config 0x400000000
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 3
------------------------------------------------------------
...
------------------------------------------------------------
perf_event_attr:
size 120
config 0x400000000
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 15 group_fd -1 flags 0x8 = 19
------------------------------------------------------------
perf_event_attr:
size 120
config 0x800000000
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 16 group_fd -1 flags 0x8 = 20
------------------------------------------------------------
...
------------------------------------------------------------
perf_event_attr:
size 120
config 0x800000000
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 23 group_fd -1 flags 0x8 = 27
cycles: 0: 836272 1001525722 1001525722
cycles: 1: 628564 1001580453 1001580453
cycles: 2: 872693 1001605997 1001605997
cycles: 3: 70417 1001641369 1001641369
cycles: 4: 88593 1001726722 1001726722
cycles: 5: 470495 1001752993 1001752993
cycles: 6: 484733 1001840440 1001840440
cycles: 7:
|
||
|
Jin Yao
|
444624307c |
perf pmu: Save detected hybrid pmus to a global pmu list
We identify the cpu_core pmu and cpu_atom pmu by explicitly checking following files: For cpu_core, checks: "/sys/bus/event_source/devices/cpu_core/cpus" For cpu_atom, checks: "/sys/bus/event_source/devices/cpu_atom/cpus" If the 'cpus' file exists and it has data, the pmu exists. But in order not to hardcode the "cpu_core" and "cpu_atom", and make the code in a generic way. So if the path "/sys/bus/event_source/devices/cpu_xxx/cpus" exists, the hybrid pmu exists. All the detected hybrid pmus are linked to a global list 'perf_pmu__hybrid_pmus' and then next we just need to iterate the list to get all hybrid pmu by using perf_pmu__for_each_hybrid_pmu. Signed-off-by: Jin Yao <[email protected]> Reviewed-by: Jiri Olsa <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Kan Liang <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Nicholas Fraser
|
d0713d4ca3 |
perf data: Add JSON export
This adds a feature to export perf data to JSON.
The resolved symbols are exported into the JSON so that external tools
don't need to load the dsos themselves (or even have access to them at
all.) This makes it easy to load and analyze perf data with standalone
tools where direct perf or libbabeltrace integration is impractical.
The exporter uses a minimal inline JSON encoding without any external
dependencies. Currently it only outputs some headers and sample metadata
but it's easily extensible.
Use it like this:
$ perf data convert --to-json out.json
Committer notes:
Fixup a __printf() bug that broke the build:
util/data-convert-json.c:103:11: error: expected ‘)’ before numeric constant
103 | __(printf, 5, 6)
| ^~
| )
util/data-convert-json.c: In function ‘output_sample_callchain_entry’:
util/data-convert-json.c:124:2: error: implicit declaration of function ‘output_json_key_format’; did you mean ‘output_json_format’? [-Werror=implicit-function-declaration]
124 | output_json_key_format(out, false, 5, "ip", "\"0x%" PRIx64 "\"", ip);
| ^~~~~~~~~~~~~~~~~~~~~~
| output_json_format
Also had to add this patch to fix errors reported by various versions of
clang:
- if (al && al->sym && al->sym->name && strlen(al->sym->name) > 0) {
+ if (al && al->sym && al->sym->namelen) {
al->sym->name is a zero sized array, to avoid one extra alloc in the
symbol__new() constructor, sym->namelen carries its strlen.
Committer testing:
$ ls -la out.json
ls: cannot access 'out.json': No such file or directory
$ perf record sleep 0.1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.001 MB perf.data (8 samples) ]
$ perf report --stats | grep -w SAMPLE
SAMPLE events: 8
$ perf data convert --to-json out.json
[ perf data convert: Converted 'perf.data' into JSON data 'out.json' ]
[ perf data convert: Converted and wrote 0.002 MB (8 samples) ]
$ ls -la out.json
-rw-rw-r--. 1 acme acme 2017 Apr 26 17:29 out.json
$ cat out.json
{
"linux-perf-json-version": 1,
"headers": {
"header-version": 1,
"captured-on": "2021-04-26T20:28:57Z",
"data-offset": 432,
"data-size": 1016,
"feat-offset": 1448,
"hostname": "five",
"os-release": "5.11.14-200.fc33.x86_64",
"arch": "x86_64",
"cpu-desc": "AMD Ryzen 9 3900X 12-Core Processor",
"cpuid": "AuthenticAMD,23,113,0",
"nrcpus-online": 24,
"nrcpus-avail": 24,
"perf-version": "5.12.gee134f3189bd",
"cmdline": [
"/home/acme/bin/perf",
"record",
"sleep",
"0.1"
]
},
"samples": [
{
"timestamp": 170517539043684,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6268827"
}
]
},
{
"timestamp": 170517539048443,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa661359d"
}
]
},
{
"timestamp": 170517539051018,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6311e18"
}
]
},
{
"timestamp": 170517539053652,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb77b4812b",
"symbol": "_dl_start",
"dso": "ld-2.32.so"
}
]
},
{
"timestamp": 170517539055306,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa6269286"
}
]
},
{
"timestamp": 170517539057590,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0xffffffffa62abd8b"
}
]
},
{
"timestamp": 170517539067559,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb77b5e9e9",
"symbol": "__GI___tunables_init",
"dso": "ld-2.32.so"
}
]
},
{
"timestamp": 170517539282452,
"pid": 375844,
"tid": 375844,
"comm": "sleep",
"callchain": [
{
"ip": "0x7fdb779978d2",
"symbol": "getenv",
"dso": "libc-2.32.so"
}
]
}
]
}
$
Signed-off-by: Nicholas Fraser <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Changbin Du <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Jin Yao <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Tan Xiaojun <[email protected]>
Cc: Ulrich Czekalla <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Alexander Antonov
|
f07952b179 |
perf stat: Basic support for iostat in perf
Add basic flow for a new iostat mode in perf. Mode is intended to provide four I/O performance metrics per each PCIe root port: Inbound Read, Inbound Write, Outbound Read, Outbound Write. The actual code to compute the metrics and attribute it to root port is in follow-on patches. Signed-off-by: Alexander Antonov <[email protected]> Acked-by: Namhyung Kim <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Alexey V Bayduraev <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Ian Rogers <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Fabian Hemmer
|
cef7af25c9 |
perf tools: Add OCaml demangling
Detect symbols generated by the OCaml compiler based on their prefix. Demangle OCaml symbols, returning a newly allocated string (like the existing Java demangling functionality). Move a helper function (hex) from tests/code-reading.c to util/string.c To test: echo 'Printf.printf "%d\n" (Random.int 42)' > test.ml perf record ocamlopt.opt test.ml perf report -d ocamlopt.opt Signed-off-by: Fabian Hemmer <[email protected]> Acked-by: Namhyung Kim <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Peter Zijlstra <[email protected]> LPU-Reference: 20210203211537.b25ytjb6dq5jfbwx@nyu Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Song Liu
|
fa853c4b83 |
perf stat: Enable counting events for BPF programs
Introduce 'perf stat -b' option, which counts events for BPF programs, like:
[root@localhost ~]# ~/perf stat -e ref-cycles,cycles -b 254 -I 1000
1.487903822 115,200 ref-cycles
1.487903822 86,012 cycles
2.489147029 80,560 ref-cycles
2.489147029 73,784 cycles
3.490341825 60,720 ref-cycles
3.490341825 37,797 cycles
4.491540887 37,120 ref-cycles
4.491540887 31,963 cycles
The example above counts 'cycles' and 'ref-cycles' of BPF program of id
254. This is similar to bpftool-prog-profile command, but more
flexible.
'perf stat -b' creates per-cpu perf_event and loads fentry/fexit BPF
programs (monitor-progs) to the target BPF program (target-prog). The
monitor-progs read perf_event before and after the target-prog, and
aggregate the difference in a BPF map. Then the user space reads data
from these maps.
A new 'struct bpf_counter' is introduced to provide a common interface
that uses BPF programs/maps to count perf events.
Committer notes:
Removed all but bpf_counter.h includes from evsel.h, not needed at all.
Also BPF map lookups for PERCPU_ARRAYs need to have as its value receive
buffer passed to the kernel libbpf_num_possible_cpus() entries, not
evsel__nr_cpus(evsel), as the former uses
/sys/devices/system/cpu/possible while the later uses
/sys/devices/system/cpu/online, which may be less than the 'possible'
number making the bpf map lookup overwrite memory and cause hard to
debug memory corruption.
We need to continue using evsel__nr_cpus(evsel) when accessing the
perf_counts array tho, not to overwrite another are of memory :-)
Signed-off-by: Song Liu <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Link: https://lore.kernel.org/lkml/[email protected]/
Acked-by: Namhyung Kim <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Jin Yao
|
480accbb17 |
perf streams: Introduce branch history "streams"
We define a stream as the branch history which is aggregated by the branch records from perf samples. For example, the callchains aggregated from the branch records are considered as streams. By browsing the hot stream, we can understand the hot code path. Now we only support the callchain for stream. For measuring the hot level for a stream, we use the callchain_node->hit, higher is hotter. There may be many callchains sampled so we only focus on the top N hottest callchains. N is a user defined parameter or predefined default value (nr_streams_max). This patch creates an evsel_streams array per event, and saves the top N hottest streams in a stream array. So now we can get the per-event top N hottest streams. Signed-off-by: Jin Yao <[email protected]> Acked-by: Jiri Olsa <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Kan Liang
|
687986bbeb |
perf tools: Rename group to topdown
The group.h/c only include TopDown group related functions. The name "group" is too generic and inaccurate. Use the name "topdown" to replace it. Move topdown related functions to a dedicated file, topdown.c. Signed-off-by: Kan Liang <[email protected]> Acked-by: Jiri Olsa <[email protected]> Acked-by: Namhyung Kim <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Changbin Du
|
a80abe2a9a |
perf tools: Add general function to parse sublevel options
This factors out a general function perf_parse_sublevel_options() to parse sublevel options. The 'sublevel' options is something like the '--debug' options which allow more sublevel options. Signed-off-by: Changbin Du <[email protected]> Acked-by: Namhyung Kim <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Steven Rostedt (VMware) <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Jiri Olsa
|
6953beb4dd |
perf clockid: Move parse_clockid() to new clockid object
Move parse_clockid and all needed clcckid related stuff into clockid object. We are going to add clockid_name function in following change, so it's better it's placed in separated object and not in builtin-record.c. No functional change is intended. Signed-off-by: Jiri Olsa <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: David Ahern <[email protected]> Cc: Geneviève Bastien <[email protected]> Cc: Ian Rogers <[email protected]> Cc: Jeremie Galarneau <[email protected]> Cc: Michael Petlan <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
1f16fcad68 |
perf parse-events: Disable a subset of bison warnings
Rather than disable all warnings with -w, disable specific warnings.
Predicate enabling the warnings on a recent version of bison.
Tested with GCC 9.3.0 and clang 9.0.1.
Committer testing:
The full set of compilers, gcc and clang that this will be tested on
will be on the signed tag when this change goes upstream.
Had to add -Wno-switch-enum to build on opensuse tumbleweed:
/tmp/build/perf/util/parse-events-bison.c: In function 'yydestruct':
/tmp/build/perf/util/parse-events-bison.c:1200:3: error: enumeration value 'YYSYMBOL_YYEMPTY' not handled in switch [-Werror=switch-enum]
1200 | switch (yykind)
| ^~~~~~
/tmp/build/perf/util/parse-events-bison.c:1200:3: error: enumeration value 'YYSYMBOL_YYEOF' not handled in switch [-Werror=switch-enum]
Also replace -Wno-error=implicit-function-declaration with -Wno-implicit-function-declaration.
Also needed to check just the first two levels of the bison version, as
the patch was assuming that all versions were of the form x.y.z, and
there are several cases where it is just x.y, breaking the build.
Signed-off-by: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jin Yao <[email protected]>
Cc: John Garry <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Ian Rogers
|
304d7a90c4 |
perf parse-events: Disable a subset of flex warnings
Rather than disable all warnings with -w, disable specific warnings.
Predicate enabling the warnings on more recent flex versions.
Tested with GCC 9.3.0 and clang 9.0.1.
Committer notes:
The full set of compilers, gcc and clang that this will be tested on
will be on the signed tag when this change goes upstream.
Added -Wno-misleading-indentation to the flex_flags to overcome this on
opensuse tumbleweed when building with clang:
CC /tmp/build/perf/util/parse-events-flex.o
CC /tmp/build/perf/util/pmu.o
/tmp/build/perf/util/parse-events-flex.c:5038:13: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation]
if ( ! yyg->yy_state_buf )
^
/tmp/build/perf/util/parse-events-flex.c:5036:9: note: previous statement is here
if ( ! yyg->yy_state_buf )
^
And we need to use this to redirect stderr to stdin and then grep in a
way that is acceptable for BusyBox shell:
2>&1 |
Previously I was using:
|&
Which seems to be bash specific.
Added -Wno-sign-compare to overcome this on systems such as centos:7:
CC /tmp/build/perf/util/parse-events-flex.o
CC /tmp/build/perf/util/pmu.o
CC /tmp/build/perf/util/pmu-flex.o
util/parse-events.l: In function 'parse_events_lex':
/tmp/build/perf/util/parse-events-flex.c:193:36: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
for ( yyl = n; yyl < yyleng; ++yyl )\
^
/tmp/build/perf/util/parse-events-flex.c:204:9: note: in expansion of macro 'YY_LESS_LINENO'
Added -Wno-unused-parameter to overcome this in systems such as
centos:7:
CC /tmp/build/perf/util/parse-events-flex.o
CC /tmp/build/perf/util/pmu.o
/tmp/build/perf/util/parse-events-flex.c: In function 'yy_fatal_error':
/tmp/build/perf/util/parse-events-flex.c:6265:58: error: unused parameter 'yyscanner' [-Werror=unused-parameter]
static void yy_fatal_error (yyconst char* msg , yyscan_t yyscanner)
^
Added -Wno-missing-declarations to build in systems such as centos:6:
/tmp/build/perf/util/parse-events-flex.c:6313: error: no previous prototype for 'parse_events_get_column'
/tmp/build/perf/util/parse-events-flex.c:6389: error: no previous prototype for 'parse_events_set_column'
And -Wno-missing-prototypes to cover older compilers:
-Wmissing-prototypes (C only)
Warn if a global function is defined without a previous prototype declaration. This warning is issued even if the definition itself provides a prototype. The aim is to detect global functions that fail to be declared in header files.
-Wmissing-declarations (C only)
Warn if a global function is defined without a previous declaration. Do so even if the definition itself provides a prototype. Use this option to detect global functions that are not declared in header files.
Older C compilers lack -Wno-misleading-indentation, check if it is
available before using it.
Also needed to check just the first two levels of the flex version, as
the patch was assuming that all versions were of the form x.y.z, and
there are several cases where it is just x.y, breaking the build.
Signed-off-by: Ian Rogers <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jin Yao <[email protected]>
Cc: John Garry <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Ian Rogers
|
ef9894d966 |
perf parse-events: Declare bison header file output
Declare bison header file output so that C files can depend upon them. As there are multiple output targets $@ is replaced by the target name. Signed-off-by: Ian Rogers <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Jin Yao <[email protected]> Cc: John Garry <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
4b971df992 |
perf parse-events: Declare flex header file output
Declare flex header file output so that bison C files can depend upon them. As there are multiple output targets $@ is replaced by the target name. Signed-off-by: Ian Rogers <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Jin Yao <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: John Garry <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
970a4a3418 |
perf pmu: Add flex debug build flag
Allow pmu parser's flex to be debugged as the parse-events and expr currently are. Enabling this requires the C code to call perf_pmu__flex_debug. Signed-off-by: Ian Rogers <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Jin Yao <[email protected]> Cc: John Garry <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
5011a52fc5 |
perf pmu: Add bison debug build flag
Allow pmu parser to be debugged as the parse-events and expr currently are. Enabling this requires the C code to set perf_pmu_debug. Signed-off-by: Ian Rogers <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Jin Yao <[email protected]> Cc: John Garry <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
da77a14db3 |
perf parse-events: Use automatic variable for yacc input
This reduces the command line size slightly. Signed-off-by: Ian Rogers <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Jin Yao <[email protected]> Cc: John Garry <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
8d54c308c8 |
perf parse-events: Use automatic variable for flex input
This reduces the command line size slightly. Signed-off-by: Ian Rogers <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Jin Yao <[email protected]> Cc: John Garry <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Tan Xiaojun
|
4db25f6693 |
perf tools: Move arm-spe-pkt-decoder.h/c to the new dir
Create a new arm-spe-decoder directory for subsequent extensions and move arm-spe-pkt-decoder.h/c to this directory. No code changes. Signed-off-by: Tan Xiaojun <[email protected]> Tested-by: James Clark <[email protected]> Tested-by: Qi Liu <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Al Grant <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Ian Rogers <[email protected]> Cc: Jin Yao <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Leo Yan <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Mathieu Poirier <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Will Deacon <[email protected]> Cc: [email protected] Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: James Clark <[email protected]> Signed-off-by: Leo Yan <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Stephane Eranian
|
7094349078 |
perf tools: Add optional support for libpfm4
This patch links perf with the libpfm4 library if it is available and LIBPFM4 is passed to the build. The libpfm4 library contains hardware event tables for all processors supported by perf_events. It is a helper library that helps convert from a symbolic event name to the event encoding required by the underlying kernel interface. This library is open-source and available from: http://perfmon2.sf.net. With this patch, it is possible to specify full hardware events by name. Hardware filters are also supported. Events must be specified via the --pfm-events and not -e option. Both options are active at the same time and it is possible to mix and match: $ perf stat --pfm-events inst_retired:any_p:c=1:i -e cycles .... One needs to explicitely ask for its inclusion by using the LIBPFM4 make command line option, ie its opt-in rather than opt-out of feature detection and build support. Signed-off-by: Stephane Eranian <[email protected]> Reviewed-by: Ian Rogers <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Alexey Budankov <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Daniel Borkmann <[email protected]> Cc: Florian Fainelli <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Igor Lubashev <[email protected]> Cc: Jin Yao <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Jiwei Sun <[email protected]> Cc: John Garry <[email protected]> Cc: Kan Liang <[email protected]> Cc: Leo Yan <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Martin KaFai Lau <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Yonghong Song <[email protected]> Cc: [email protected] Cc: [email protected] Cc: yuzhoujian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Ian Rogers
|
eee1950192 |
perf tools: Grab a copy of libbpf's hashmap
Allow use of hashmap in perf. Modify perf's check-headers.sh script to check that the files are kept in sync, in the same way kernel headers are checked. This will warn if they are out of sync at the start of a perf build. Committer note: This starts out of synch as a fix went thru the bpf tree, namely the one removing the needless libbpf_internal.h include in hashmap.h. There is also another change related to __WORDSIZE, that as is in tools/lib/bpf/hashmap.h causes the tools/perf/ build to fail in systems such as Alpine Linus, that uses the Musl libc, so we need an alternative way of having __WORDSIZE available, use the one used by tools/include/linux/bitops.h, that builds in all the systems I have build containers for. These differences will be resolved at some point, so keep the warning in check-headers.sh as a reminder. Signed-off-by: Ian Rogers <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Cong Wang <[email protected]> Cc: Daniel Borkmann <[email protected]> Cc: Jin Yao <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: John Fastabend <[email protected]> Cc: John Garry <[email protected]> Cc: Kajol Jain <[email protected]> Cc: Kan Liang <[email protected]> Cc: Kim Phillips <[email protected]> Cc: Leo Yan <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Martin KaFai Lau <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Song Liu <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Yonghong Song <[email protected]> Cc: [email protected] Cc: kp singh <[email protected]> Cc: [email protected] Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Arnaldo Carvalho de Melo
|
9a39994467 |
perf evlist: Move the sideband thread routines to separate object
To avoid dragging more stuff into the perf python binding in the following csets. Reported-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Namhyung Kim <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Arnaldo Carvalho de Melo
|
40c7d2460e |
perf tools: Move routines that probe for perf API features to separate file
Trying to disentangle this a bit further, unfortunately it uses parse_events(), its interesting to have it separated anyway, so do it. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Jiri Olsa
|
26226a9772 |
perf expr: Move expr lexer to flex
Adding expr flex code instead of the manual parser code. So it's easily extensible in upcoming changes. The new flex code is in flex.l object and gets compiled like all the other flexers we use. It's defined as flex reentrant parser. It's used by both expr__parse and expr__find_other interfaces by separating the starting point. There's no intended change of functionality ;-) the test expr is passing. Signed-off-by: Jiri Olsa <[email protected]> Reviewed-by: Andi Kleen <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: John Garry <[email protected]> Cc: Kajol Jain <[email protected]> Cc: Michael Petlan <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ravi Bangoria <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Jiri Olsa
|
576a65b697 |
perf expr: Add expr.c object
Add generic expr code into new expr.c object. The expr.c object will be mainly used in following change that will get rid of the manual flex code, Signed-off-by: Jiri Olsa <[email protected]> Reviewed-by: Andi Kleen <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: John Garry <[email protected]> Cc: Kajol Jain <[email protected]> Cc: Michael Petlan <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ravi Bangoria <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Andi Kleen
|
267ed5d859 |
perf affinity: Add infrastructure to save/restore affinity
The kernel perf subsystem has to IPI to the target CPU for many operations. On systems with many CPUs and when managing many events the overhead can be dominated by lots of IPIs. An alternative is to set up CPU affinity in the perf tool, then set up all the events for that CPU, and then move on to the next CPU. Add some affinity management infrastructure to enable such a model. Used in followon patches. Committer notes: Use zfree() in some places, add missing stdbool.h header, some minor coding style changes. Signed-off-by: Andi Kleen <[email protected]> Acked-by: Jiri Olsa <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Andi Kleen
|
d96645821e |
perf pmu: Use file system cache to optimize sysfs access
pmu.c does a lot of redundant /sys accesses while parsing aliases
and probing for PMUs. On large systems with a lot of PMUs this
can get expensive (>2s):
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
27.25 1.227847 8 160888 16976 openat
26.42 1.190481 7 164224 164077 stat
Add a cache to remember if specific file names exist or don't
exist, which eliminates most of this overhead.
Also optimize some stat() calls to be slightly cheaper access()
Resulting in:
0.18 0.004166 2 1851 305 open
0.08 0.001970 2 829 622 access
Signed-off-by: Andi Kleen <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Jin Yao
|
6041441870 |
perf block: Cleanup and refactor block info functions
We have already implemented some block-info related functions.
Now it's time to do some cleanup, refactoring and move the
functions and structures to new block-info.h/block-info.c.
v4:
---
Move code for skipping column length calculation to patch:
'perf diff: Don't use hack to skip column length calculation'
v3:
---
1. Rename the patch title
2. Rename from block.h/block.c to block-info.h/block-info.c
3. Move more common part to block-info, such as
block_info__process_sym.
4. Remove the nasty hack for skipping calculation of column
length
Signed-off-by: Jin Yao <[email protected]>
Reviewed-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jin Yao <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
|
||
|
Jin Yao
|
cebf7d51a6 |
perf diff: Report noisy for cycles diff
This patch prints the stddev and hist for the cycles diff of program block. It can help us to understand if the cycles is noisy or not. This patch is inspired by Andi Kleen's patch: https://lwn.net/Articles/600471/ We create new option '--cycles-hist'. Example: perf record -b ./div perf record -b ./div perf diff -c cycles # Baseline [Program Block Range] Cycles Diff Shared Object Symbol # ........ .......................................................... .... ................. ............................ # 46.72% [div.c:40 -> div.c:40] 0 div [.] main 46.72% [div.c:42 -> div.c:44] 0 div [.] main 46.72% [div.c:42 -> div.c:39] 0 div [.] main 20.54% [random_r.c:357 -> random_r.c:394] 1 libc-2.27.so [.] __random_r 20.54% [random_r.c:357 -> random_r.c:380] 0 libc-2.27.so [.] __random_r 20.54% [random_r.c:388 -> random_r.c:388] 0 libc-2.27.so [.] __random_r 20.54% [random_r.c:388 -> random_r.c:391] 0 libc-2.27.so [.] __random_r 17.04% [random.c:288 -> random.c:291] 0 libc-2.27.so [.] __random 17.04% [random.c:291 -> random.c:291] 0 libc-2.27.so [.] __random 17.04% [random.c:293 -> random.c:293] 0 libc-2.27.so [.] __random 17.04% [random.c:295 -> random.c:295] 0 libc-2.27.so [.] __random 17.04% [random.c:295 -> random.c:295] 0 libc-2.27.so [.] __random 17.04% [random.c:298 -> random.c:298] 0 libc-2.27.so [.] __random 8.40% [div.c:22 -> div.c:25] 0 div [.] compute_flag 8.40% [div.c:27 -> div.c:28] 0 div [.] compute_flag 5.14% [rand.c:26 -> rand.c:27] 0 libc-2.27.so [.] rand 5.14% [rand.c:28 -> rand.c:28] 0 libc-2.27.so [.] rand 2.15% [rand@plt+0 -> rand@plt+0] 0 div [.] rand@plt 0.00% [kernel.kallsyms] [k] __x86_indirect_thunk_rax 0.00% [do_mmap+714 -> do_mmap+732] -10 [kernel.kallsyms] [k] do_mmap 0.00% [do_mmap+737 -> do_mmap+765] 1 [kernel.kallsyms] [k] do_mmap 0.00% [do_mmap+262 -> do_mmap+299] 0 [kernel.kallsyms] [k] do_mmap 0.00% [__x86_indirect_thunk_r15+0 -> __x86_indirect_thunk_r15+0] 7 [kernel.kallsyms] [k] __x86_indirect_thunk_r15 0.00% [native_sched_clock+0 -> native_sched_clock+119] -1 [kernel.kallsyms] [k] native_sched_clock 0.00% [native_write_msr+0 -> native_write_msr+16] -13 [kernel.kallsyms] [k] native_write_msr When we enable the option '--cycles-hist', the output is perf diff -c cycles --cycles-hist # Baseline [Program Block Range] Cycles Diff stddev/Hist Shared Object Symbol # ........ .......................................................... .... ................. ................. ............................ # 46.72% [div.c:40 -> div.c:40] 0 ± 37.8% ▁█▁▁██▁█ div [.] main 46.72% [div.c:42 -> div.c:44] 0 ± 49.4% ▁▁▂█▂▂▂▂ div [.] main 46.72% [div.c:42 -> div.c:39] 0 ± 24.1% ▃█▂▄▁▃▂▁ div [.] main 20.54% [random_r.c:357 -> random_r.c:394] 1 ± 33.5% ▅▂▁█▃▁▂▁ libc-2.27.so [.] __random_r 20.54% [random_r.c:357 -> random_r.c:380] 0 ± 39.4% ▁▁█▁██▅▁ libc-2.27.so [.] __random_r 20.54% [random_r.c:388 -> random_r.c:388] 0 libc-2.27.so [.] __random_r 20.54% [random_r.c:388 -> random_r.c:391] 0 ± 41.2% ▁▃▁▂█▄▃▁ libc-2.27.so [.] __random_r 17.04% [random.c:288 -> random.c:291] 0 ± 48.8% ▁▁▁▁███▁ libc-2.27.so [.] __random 17.04% [random.c:291 -> random.c:291] 0 ±100.0% ▁█▁▁▁▁▁▁ libc-2.27.so [.] __random 17.04% [random.c:293 -> random.c:293] 0 ±100.0% ▁█▁▁▁▁▁▁ libc-2.27.so [.] __random 17.04% [random.c:295 -> random.c:295] 0 ±100.0% ▁█▁▁▁▁▁▁ libc-2.27.so [.] __random 17.04% [random.c:295 -> random.c:295] 0 libc-2.27.so [.] __random 17.04% [random.c:298 -> random.c:298] 0 ± 75.6% ▃█▁▁▁▁▁▁ libc-2.27.so [.] __random 8.40% [div.c:22 -> div.c:25] 0 ± 42.1% ▁▃▁▁███▁ div [.] compute_flag 8.40% [div.c:27 -> div.c:28] 0 ± 41.8% ██▁▁▄▁▁▄ div [.] compute_flag 5.14% [rand.c:26 -> rand.c:27] 0 ± 37.8% ▁▁▁████▁ libc-2.27.so [.] rand 5.14% [rand.c:28 -> rand.c:28] 0 libc-2.27.so [.] rand 2.15% [rand@plt+0 -> rand@plt+0] 0 div [.] rand@plt 0.00% [kernel.kallsyms] [k] __x86_indirect_thunk_rax 0.00% [do_mmap+714 -> do_mmap+732] -10 [kernel.kallsyms] [k] do_mmap 0.00% [do_mmap+737 -> do_mmap+765] 1 [kernel.kallsyms] [k] do_mmap 0.00% [do_mmap+262 -> do_mmap+299] 0 [kernel.kallsyms] [k] do_mmap 0.00% [__x86_indirect_thunk_r15+0 -> __x86_indirect_thunk_r15+0] 7 [kernel.kallsyms] [k] __x86_indirect_thunk_r15 0.00% [native_sched_clock+0 -> native_sched_clock+119] -1 ± 38.5% ▄█▁ [kernel.kallsyms] [k] native_sched_clock 0.00% [native_write_msr+0 -> native_write_msr+16] -13 ± 47.1% ▁█▇▃▁▁ [kernel.kallsyms] [k] native_write_msr v8: --- Rebase to perf/core branch v7: --- 1. v6 got Jiri's ACK. 2. Rebase to latest perf/core branch. v6: --- 1. Jiri provides better code for using data__hpp_register() in ui_init(). Use this code in v6. v5: --- 1. Refine the use of data__hpp_register() in ui_init() according to Jiri's suggestion. v4: --- 1. Rename the new option from '--noisy' to '--cycles-hist' 2. Remove the option '-n'. 3. Only update the spark value and stats when '--cycles-hist' is enabled. 4. Remove the code of printing '..'. v3: --- 1. Move the histogram to a separate column 2. Move the svals[] out of struct stats v2: --- Jiri got a compile error, CC builtin-diff.o builtin-diff.c: In function ‘compute_cycles_diff’: builtin-diff.c:712:10: error: taking the absolute value of unsigned type ‘u64’ {aka ‘long unsigned int’} has no effect [-Werror=absolute-value] 712 | labs(pair->block_info->cycles_spark[i] - | ^~~~ Because the result of u64 - u64 is still u64. Now we change the type of cycles_spark[] to s64. Signed-off-by: Jin Yao <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Kan Liang <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Arnaldo Carvalho de Melo
|
ca1252779f |
perf evsel: Introduce evsel_fprintf.h
We already had evsel_fprintf.c, add its counterpart, so that we can reduce evsel.h a bit more. We needed a new perf_event_attr_fprintf.c file so as to have a separate object to link with the python binding in tools/perf/util/python-ext-sources and not drag symbol_conf, etc into the python binding. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Arnaldo Carvalho de Melo
|
32ff3fec07 |
perf copyfile: Move copyfile routines to separate files
Further reducing the util.c hodgepodge files. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Arnaldo Carvalho de Melo
|
055c67ed39 |
perf tools: Move event synthesizing routines to separate .c file
For better grouping, in time we may end up making most of these static, i.e. generalizing the 'perf record' synthesizing code so that based on the target it can do the right thing and call the needed synthesizers. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Arnaldo Carvalho de Melo
|
4a3cec8494 |
perf dsos: Move the dsos struct and its methods to separate source files
So that we can reduce the header dependency tree further, in the process noticed that lots of places were getting even things like build-id routines and 'struct perf_tool' definition indirectly, so fix all those too. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |
||
|
Arnaldo Carvalho de Melo
|
125009026b |
perf cacheline: Move cacheline related routines to separate files
To disentangle util/sort.h a bit more. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> |