From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: "Jin, Yao" <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>,
jolsa@kernel.org, peterz@infradead.org, mingo@redhat.com,
alexander.shishkin@linux.intel.com, Linux-kernel@vger.kernel.org,
ak@linux.intel.com, kan.liang@intel.com, yao.jin@intel.com
Subject: Re: [PATCH v5 2/6] perf record: Get the first sample time and last sample time
Date: Mon, 23 Oct 2017 16:05:50 -0300 [thread overview]
Message-ID: <20171023190550.GA7045@kernel.org> (raw)
In-Reply-To: <6652168b-70e0-d643-d0a1-64fb310e57b1@linux.intel.com>
Em Tue, Oct 24, 2017 at 01:38:26AM +0800, Jin, Yao escreveu:
>
>
> On 10/23/2017 11:04 PM, Jiri Olsa wrote:
> > On Sat, Oct 21, 2017 at 07:27:50AM +0800, Jin Yao wrote:
> > > In perf record, it's walked on all samples yet. So it's very easy to get
> > > the first/last samples and save the time to perf file header via the
> > > function write_sample_time().
> > >
> > > In later, perf report/script will fetch the time from perf file header.
> > >
> > > Change log:
> > > -----------
> > > v5: There is an issue that the sample walking can only work when
> > > '--buildid-all' is not enabled. So we need to let the walking
> > > be able to work even if '--buildid-all' is enabled and let the
> > > processing skips the dso hit marking for this case.
> > >
> > > At first, I want to provide a new option "--record-time-boundaries".
> > > While after consideration, I think a new option is not very
> > > necessary.
> > >
> > > v3: Remove the definitions of first_sample_time and last_sample_time
> > > from struct record and directly save them in perf_evlist.
> > >
> > > Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
> > > ---
> > > tools/perf/builtin-record.c | 20 ++++++++++++--------
> > > 1 file changed, 12 insertions(+), 8 deletions(-)
> > >
> > > diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> > > index a6cbf16..bd711e8 100644
> > > --- a/tools/perf/builtin-record.c
> > > +++ b/tools/perf/builtin-record.c
> > > @@ -391,8 +391,19 @@ static int process_sample_event(struct perf_tool *tool,
> > > {
> > > struct record *rec = container_of(tool, struct record, tool);
> > > - rec->samples++;
> > > + if (rec->evlist->first_sample_time == 0)
> > > + rec->evlist->first_sample_time = sample->time;
> > > +
> > > + rec->evlist->last_sample_time = sample->time;
> > > +
> > > + /*
> > > + * If --buildid-all is given, it marks all DSO regardless of hits,
> > > + * so no need to process this sample.
> > > + */
> > > + if (rec->buildid_all)
> > > + return 0;
> > > + rec->samples++;
> > > return build_id__mark_dso_hit(tool, event, sample, evsel, machine);
> > > }
> > > @@ -415,13 +426,6 @@ static int process_buildids(struct record *rec)
> > > */
> > > symbol_conf.ignore_vmlinux_buildid = true;
> > > - /*
> > > - * If --buildid-all is given, it marks all DSO regardless of hits,
> > > - * so no need to process samples.
> > > - */
> > > - if (rec->buildid_all)
> > > - rec->tool.sample = NULL;
> >
> > hum, could you still unset the sample if there's no time given?
> > and keep the speed in this case..
> >
> > jirka
> >
>
> Oh, yes, I should do that. Thanks Jiri!
>
> Hi Arnaldo, do you have any comment for v5?
I'll try to look at it, but don't that hold v6, I'd say :-\
- Arnaldo
> I will prepare v6 for adding fixes according to all comments.
>
> Thanks
> Jin Yao
next prev parent reply other threads:[~2017-10-23 19:05 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-20 23:27 [PATCH v5 0/6] perf report/script: Support percent and multiple range in --time option Jin Yao
2017-10-20 23:27 ` [PATCH v5 1/6] perf header: Record first sample time and last sample time in perf file header Jin Yao
2017-10-20 23:27 ` [PATCH v5 2/6] perf record: Get the first sample time and last sample time Jin Yao
2017-10-23 15:04 ` Jiri Olsa
2017-10-23 17:38 ` Jin, Yao
2017-10-23 19:05 ` Arnaldo Carvalho de Melo [this message]
2017-10-24 2:03 ` Jin, Yao
2017-10-24 7:16 ` Jiri Olsa
2017-10-24 7:29 ` Jin, Yao
2017-11-03 13:00 ` Jin, Yao
2017-11-03 16:29 ` Arnaldo Carvalho de Melo
2017-11-03 21:33 ` Jin, Yao
2017-11-04 10:24 ` Jiri Olsa
2017-11-06 0:28 ` Jin, Yao
2017-10-20 23:27 ` [PATCH v5 3/6] perf util: Create function to parse time percent Jin Yao
2017-10-20 23:27 ` [PATCH v5 4/6] perf util: Create function to perform multiple time range checking Jin Yao
2017-10-20 23:27 ` [PATCH v5 5/6] perf report: support time percent and multiple time ranges Jin Yao
2017-10-20 23:27 ` [PATCH v5 6/6] perf script: " Jin Yao
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