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References: <20220422053401.208207-1-namhyung@kernel.org> <YmJ/VAt2yblZC9HN@krava>
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From:   Namhyung Kim <namhyung@kernel.org>
Date:   Fri, 22 Apr 2022 07:53:22 -0700
Message-ID: <CAM9d7cjGuTyOmKQsoA9kJPg-_VAuP+jWzwd=g8Z_WpMUZkypUQ@mail.gmail.com>
Subject: Re: [RFC 0/4] perf record: Implement off-cpu profiling with BPF (v1)
To:     Jiri Olsa <olsajiri@gmail.com>
Cc:     Arnaldo Carvalho de Melo <acme@kernel.org>,
        Jiri Olsa <jolsa@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Andi Kleen <ak@linux.intel.com>,
        Ian Rogers <irogers@google.com>,
        Song Liu <songliubraving@fb.com>, Hao Luo <haoluo@google.com>,
        bpf <bpf@vger.kernel.org>,
        linux-perf-users <linux-perf-users@vger.kernel.org>,
        Blake Jones <blakejones@google.com>
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Hi Jiri,

On Fri, Apr 22, 2022 at 3:11 AM Jiri Olsa <olsajiri@gmail.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