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

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Date:   Fri, 22 Apr 2022 07:53:22 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Jiri Olsa <olsajiri@...il.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        Song Liu <songliubraving@...com>, Hao Luo <haoluo@...gle.com>,
        bpf <bpf@...r.kernel.org>,
        linux-perf-users <linux-perf-users@...r.kernel.org>,
        Blake Jones <blakejones@...gle.com>
Subject: Re: [RFC 0/4] perf record: Implement off-cpu profiling with BPF (v1)

Hi Jiri,

On Fri, Apr 22, 2022 at 3:11 AM Jiri Olsa <olsajiri@...il.com> wrote:
>
> 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 ?

Oops, you're right.  Will resend soon.

Thanks,
Namhyung