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2 commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Namhyung Kim
|
ef60b8f572 |
perf trace: Support --summary-mode=cgroup
Add a new summary mode to collect stats for each cgroup.
$ sudo ./perf trace -as --bpf-summary --summary-mode=cgroup -- sleep 1
Summary of events:
cgroup /user.slice/user-657345.slice/user@657345.service/session.slice/org.gnome.Shell@x11.service, 535 events
syscall calls errors total min avg max stddev
(msec) (msec) (msec) (msec) (%)
--------------- -------- ------ -------- --------- --------- --------- ------
ppoll 15 0 373.600 0.004 24.907 197.491 55.26%
poll 15 0 1.325 0.001 0.088 0.369 38.76%
close 66 0 0.567 0.007 0.009 0.026 3.55%
write 150 0 0.471 0.001 0.003 0.010 3.29%
recvmsg 94 83 0.290 0.000 0.003 0.037 16.39%
ioctl 26 0 0.237 0.001 0.009 0.096 50.13%
timerfd_create 66 0 0.236 0.003 0.004 0.024 8.92%
timerfd_settime 70 0 0.160 0.001 0.002 0.012 7.66%
writev 10 0 0.118 0.001 0.012 0.019 18.17%
read 9 0 0.021 0.001 0.002 0.004 14.07%
getpid 14 0 0.019 0.000 0.001 0.004 20.28%
cgroup /system.slice/polkit.service, 94 events
syscall calls errors total min avg max stddev
(msec) (msec) (msec) (msec) (%)
--------------- -------- ------ -------- --------- --------- --------- ------
ppoll 22 0 19.811 0.000 0.900 9.273 63.88%
write 30 0 0.040 0.001 0.001 0.003 12.09%
recvmsg 12 0 0.018 0.001 0.002 0.006 28.15%
read 18 0 0.013 0.000 0.001 0.003 21.99%
poll 12 0 0.006 0.000 0.001 0.001 4.48%
cgroup /user.slice/user-657345.slice/user@657345.service/app.slice/app-org.gnome.Terminal.slice/gnome-terminal-server.service, 21 events
syscall calls errors total min avg max stddev
(msec) (msec) (msec) (msec) (%)
--------------- -------- ------ -------- --------- --------- --------- ------
ppoll 4 0 17.476 0.003 4.369 13.298 69.65%
recvmsg 15 12 0.068 0.002 0.005 0.014 26.53%
writev 1 0 0.033 0.033 0.033 0.033 0.00%
poll 1 0 0.005 0.005 0.005 0.005 0.00%
...
It works only for --bpf-summary for now.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20250501225337.928470-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
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|
Namhyung Kim
|
1bec43f523 |
perf trace: Implement syscall summary in BPF
When -s/--summary option is used, it doesn't need (augmented) arguments
of syscalls. Let's skip the augmentation and load another small BPF
program to collect the statistics in the kernel instead of copying the
data to the ring-buffer to calculate the stats in userspace. This will
be much more light-weight than the existing approach and remove any lost
events.
Let's add a new option --bpf-summary to control this behavior. I cannot
make it default because there's no way to get e_machine in the BPF which
is needed for detecting different ABIs like 32-bit compat mode.
No functional changes intended except for no more LOST events. :)
$ sudo ./perf trace -as --summary-mode=total --bpf-summary sleep 1
Summary of events:
total, 6194 events
syscall calls errors total min avg max stddev
(msec) (msec) (msec) (msec) (%)
--------------- -------- ------ -------- --------- --------- --------- ------
epoll_wait 561 0 4530.843 0.000 8.076 520.941 18.75%
futex 693 45 4317.231 0.000 6.230 500.077 21.98%
poll 300 0 1040.109 0.000 3.467 120.928 17.02%
clock_nanosleep 1 0 1000.172 1000.172 1000.172 1000.172 0.00%
ppoll 360 0 872.386 0.001 2.423 253.275 41.91%
epoll_pwait 14 0 384.349 0.001 27.453 380.002 98.79%
pselect6 14 0 108.130 7.198 7.724 8.206 0.85%
nanosleep 39 0 43.378 0.069 1.112 10.084 44.23%
...
Reviewed-by: Howard Chu <howardchu95@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20250326044001.3503432-1-namhyung@kernel.org
[ Added fixup sent from Namhyung in response to my report to make it also dependent on CONFIG_TRACE ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|