Hello, Here is the 5th version of the series to support inherit events for bperf. This version added the `inherit` flag for struct `target` instead of `bpf_stat_opts`, and also fixed the logic when TGID w/o inherit. bperf (perf-stat --bpf-counter) has not supported inherit events during fork() since it was first introduced. This patch series tries to add this support by: 1) adding two new bpf programs to monitor task lifecycle; 2) recording new tasks in the filter map dynamically; 3) reusing `accum_key` of parent task for new tasks. Thanks, Tengda Changelog: --------- v5: (Address comments from Namhyung, thanks) * Add the `inherit` flag for struct `target` instead of `bpf_stat_opts` * Fix the logic when TGID w/o inherit v4: https://lore.kernel.org/all/20241012023225.151084-1-wutengda@xxxxxxxxxxxxxxx/ * Add an `inherit` flag to bperf to control inherit behavior v3: https://lore.kernel.org/all/20240916014318.267709-1-wutengda@xxxxxxxxxxxxxxx/ * Use pid or tgid based on filter type in new_task prog * Add comments to explain pid usage for TGID type in exit_task prog v2: https://lore.kernel.org/all/20240905115918.772234-1-wutengda@xxxxxxxxxxxxxxx/ * Remove the unused init_filter_entries in follower bpf, declare a global filter_entry_count in bpf_counter instead * Attach on_newtask and on_exittask progs only if the filter type is either PID or TGID v1: https://lore.kernel.org/all/20240904123103.732507-1-wutengda@xxxxxxxxxxxxxxx/ Tengda Wu (2): perf stat: Support inherit events during fork() for bperf perf test: Use sqrtloop workload to test bperf event tools/perf/builtin-stat.c | 1 + tools/perf/tests/shell/stat_bpf_counters.sh | 2 +- tools/perf/util/bpf_counter.c | 35 +++++-- tools/perf/util/bpf_skel/bperf_follower.bpf.c | 98 +++++++++++++++++-- tools/perf/util/bpf_skel/bperf_u.h | 5 + tools/perf/util/target.h | 1 + 6 files changed, 127 insertions(+), 15 deletions(-) -- 2.34.1
