lkml.org 
[lkml]   [2022]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] perf data: Prefer sampled CPU when exporting JSON
Em Wed, Jun 22, 2022 at 10:42:43AM -0400, Shawn M. Chapla escreveu:
> On Thu, May 26, 2022 at 04:14:47PM -0400, Shawn M. Chapla wrote:
> > When CPU has been explicitly sampled (via --sample-cpu), prefer this
> > sampled value over the thread CPU value when exporting to JSON.

> > Signed-off-by: Shawn M. Chapla <schapla@codeweavers.com>
> > ---
> > tools/perf/util/data-convert-json.c | 5 ++++-
> > 1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/perf/util/data-convert-json.c b/tools/perf/util/data-convert-json.c
> > index f1ab6edba446..613d6ae82663 100644
> > --- a/tools/perf/util/data-convert-json.c
> > +++ b/tools/perf/util/data-convert-json.c
> > @@ -149,6 +149,7 @@ static int process_sample_event(struct perf_tool *tool,
> > struct convert_json *c = container_of(tool, struct convert_json, tool);
> > FILE *out = c->out;
> > struct addr_location al, tal;
> > + u64 sample_type = __evlist__combined_sample_type(evsel->evlist);
> > u8 cpumode = PERF_RECORD_MISC_USER;
> >
> > if (machine__resolve(machine, &al, sample) < 0) {
> > @@ -168,7 +169,9 @@ static int process_sample_event(struct perf_tool *tool,
> > output_json_key_format(out, true, 3, "pid", "%i", al.thread->pid_);
> > output_json_key_format(out, true, 3, "tid", "%i", al.thread->tid);
> >
> > - if (al.thread->cpu >= 0)
> > + if ((sample_type & PERF_SAMPLE_CPU))
> > + output_json_key_format(out, true, 3, "cpu", "%i", sample->cpu);
> > + else if (al.thread->cpu >= 0)
> > output_json_key_format(out, true, 3, "cpu", "%i", al.thread->cpu);
> >
> > output_json_key_string(out, true, 3, "comm", thread__comm_str(al.thread));
> > --
> > 2.36.1
> >
>
> Just checking in to see if anyone has had a chance to take a look at
> this yet.

Seems sensible, applying to perf/core for 5.20.

- Arnaldo

\
 
 \ /
  Last update: 2022-06-22 18:31    [W:0.040 / U:0.056 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site