linux-kernel - Re: [PATCHSET v3 0/5] perf inject: Fix broken data with mixed input/output

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Date:   Mon, 2 Aug 2021 10:16:28 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...hat.com>
Cc:     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>,
        Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCHSET v3 0/5] perf inject: Fix broken data with mixed
 input/output

Em Tue, Jul 20, 2021 at 11:01:43AM +0200, Jiri Olsa escreveu:
> On Mon, Jul 19, 2021 at 03:31:48PM -0700, Namhyung Kim wrote:
> > The perf inject processes the input data and produces an output with
> > injected data according to the given options.  During the work, it
> > assumes the input and output files have the same format - either a
> > regular file or a pipe.  This works for the obvious cases, but
> > sometimes makes a trouble when input and output have different
> > formats (like for debugging).

> >  * changes in v3
> >   - use task-clock:u in the pipe-test.sh
 
> Acked-by: Jiri Olsa <jolsa@...hat.com>

Thanks, applied.

Had to do some adjustments due to minor conflicts, can you please check
tmp.perf/core?

- Arnaldo
 
> thanks,
> jirka
> 
> > 
> >  * changes in v2
> >   - factor out perf_event__synthesize_for_pipe
> >   - add a shell test for pipe operations
> > 
> > 
> > For example, this patchset fixed the following cases
> > 
> >  1. input: pipe, output: file
> > 
> >   # perf record -a -o - sleep 1 | perf inject -b -o perf-pipe.data
> >   # perf report -i perf-pipe.data
> > 
> >  2. input: file, output: pipe
> > 
> >   # perf record -a -B sleep 1
> >   # perf inject -b -i perf.data | perf report -i -
> > 
> > 
> > Thanks,
> > Namhyung
> > 
> > 
> > Namhyung Kim (5):
> >   perf tools: Remove repipe argument from perf_session__new()
> >   perf tools: Pass a fd to perf_file_header__read_pipe()
> >   perf inject: Fix output from a pipe to a file
> >   perf inject: Fix output from a file to a pipe
> >   perf tools: Add pipe_test.sh to verify pipe operations
> > 
> >  tools/perf/bench/synthesize.c       |  4 +-
> >  tools/perf/builtin-annotate.c       |  2 +-
> >  tools/perf/builtin-buildid-cache.c  |  2 +-
> >  tools/perf/builtin-buildid-list.c   |  2 +-
> >  tools/perf/builtin-c2c.c            |  2 +-
> >  tools/perf/builtin-diff.c           |  4 +-
> >  tools/perf/builtin-evlist.c         |  2 +-
> >  tools/perf/builtin-inject.c         | 38 ++++++++++++++--
> >  tools/perf/builtin-kmem.c           |  2 +-
> >  tools/perf/builtin-kvm.c            |  4 +-
> >  tools/perf/builtin-lock.c           |  2 +-
> >  tools/perf/builtin-mem.c            |  3 +-
> >  tools/perf/builtin-record.c         | 40 +++--------------
> >  tools/perf/builtin-report.c         |  2 +-
> >  tools/perf/builtin-sched.c          |  4 +-
> >  tools/perf/builtin-script.c         |  4 +-
> >  tools/perf/builtin-stat.c           |  4 +-
> >  tools/perf/builtin-timechart.c      |  3 +-
> >  tools/perf/builtin-top.c            |  2 +-
> >  tools/perf/builtin-trace.c          |  2 +-
> >  tools/perf/tests/shell/pipe_test.sh | 69 +++++++++++++++++++++++++++++
> >  tools/perf/tests/topology.c         |  4 +-
> >  tools/perf/util/data-convert-bt.c   |  2 +-
> >  tools/perf/util/data-convert-json.c |  2 +-
> >  tools/perf/util/header.c            | 12 ++---
> >  tools/perf/util/header.h            |  2 +-
> >  tools/perf/util/session.c           | 11 ++---
> >  tools/perf/util/session.h           | 12 ++++-
> >  tools/perf/util/synthetic-events.c  | 53 +++++++++++++++++++++-
> >  tools/perf/util/synthetic-events.h  |  6 +++
> >  30 files changed, 217 insertions(+), 84 deletions(-)
> >  create mode 100755 tools/perf/tests/shell/pipe_test.sh
> > 
> > -- 
> > 2.32.0.402.g57bb445576-goog
> > 
> 

-- 

- Arnaldo