Hello, Sorry for pinging again. Is there any other suggestion with this patch set? If there is, please let me know. Thanks, Tengda On 2024/9/16 9:43, Tengda Wu wrote: > Hi, > > Here is the 3th version of the series to support inherit events for bperf. > This version add pid or tgid selection based on filter type in new_task > prog to avoid memory waste and potential count loss. > > > 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: > --------- > v3: (Address comments from Namhyung, thanks) > * 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/tests/shell/stat_bpf_counters.sh | 2 +- > tools/perf/util/bpf_counter.c | 32 +++++-- > tools/perf/util/bpf_skel/bperf_follower.bpf.c | 87 +++++++++++++++++-- > tools/perf/util/bpf_skel/bperf_u.h | 5 ++ > 4 files changed, 112 insertions(+), 14 deletions(-) >
