On Wed, Sep 25, 2024 at 08:43:50PM -0700, Namhyung Kim wrote: > Hello, > > On Wed, Sep 25, 2024 at 10:16:16PM +0800, Tengda Wu wrote: > > Hello, > > > > Sorry for pinging again. Is there any other suggestion with this patch set? > > If there is, please let me know. > > Sorry I was traveling last week. I think it's good now. > > Song, can I get your ack? He seems to be very busy. I'll pick this up and run some tests. Thanks, Namhyung > > > > > 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(-) > > > > >
