perf trace: Handle task exit in BPF syscall summary

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Some system calls never return because it'd terminate the calling
thread.  Let's hook the task exit path and update the duration of the
last syscall.

Before:
  $ sudo perf trace -as --bpf-summary -- true |& grep exit
  (nothing)

After:
  $ sudo perf trace -as --bpf-summary -- true |& grep exit
     exit_group             1      0     0.004     0.004     0.004     0.004      0.00%

Reviewed-by: Ian Rogers <irogers@google.com>
Acked-by: Howard Chu <howardchu95@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

...

This commit is contained in:

Namhyung Kim 2026-02-25 17:49:55 -08:00

parent 96f202eab8

commit af894feb32

1 changed files with 15 additions and 3 deletions

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tools/perf/util/bpf_skel/syscall_summary.bpf.c

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