Re: [RFC 0/4] perf record: Implement off-cpu profiling with BPF (v1)

[Jiri Olsa]

On Thu, Apr 21, 2022 at 10:33:57PM -0700, Namhyung Kim wrote:

SNIP

> The perf bench sched messaging created 400 processes to send/receive
> messages through unix sockets.  It spent a large portion of cpu cycles
> for audit filter and read/copy the messages while most of the
> offcpu-time was in read and write calls.
> 
> You can get the code from 'perf/offcpu-v1' branch in my tree at
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
> 
> Enjoy! :)

  CC      builtin-record.o
builtin-record.c:52:10: fatal error: util/off_cpu.h: No such file or directory
   52 | #include "util/off_cpu.h"

forgot to add util/off_cpu.h ?

jirka

> 
> Thanks,
> Namhyung
> 
> 
> Namhyung Kim (4):
>   perf report: Do not extend sample type of bpf-output event
>   perf record: Enable off-cpu analysis with BPF
>   perf record: Implement basic filtering for off-cpu
>   perf record: Handle argument change in sched_switch
> 
>  tools/perf/Makefile.perf               |   1 +
>  tools/perf/builtin-record.c            |  21 ++
>  tools/perf/util/Build                  |   1 +
>  tools/perf/util/bpf_off_cpu.c          | 301 +++++++++++++++++++++++++
>  tools/perf/util/bpf_skel/off_cpu.bpf.c | 214 ++++++++++++++++++
>  tools/perf/util/evsel.c                |   4 +-
>  6 files changed, 540 insertions(+), 2 deletions(-)
>  create mode 100644 tools/perf/util/bpf_off_cpu.c
>  create mode 100644 tools/perf/util/bpf_skel/off_cpu.bpf.c
> 
> 
> base-commit: 41204da4c16071be9090940b18f566832d46becc
> -- 
> 2.36.0.rc2.479.g8af0fa9b8e-goog
>