Re: [PATCH v2 4/6] perf sched timehist: Add option to specify time window of interest

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Em Tue, Nov 29, 2016 at 11:58:03AM -0700, David Ahern escreveu:
> On 11/29/16 11:56 AM, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Nov 29, 2016 at 10:15:44AM -0700, David Ahern escreveu:
> >> Add option to allow user to control analysis window. e.g., collect data
> >> for time window and analyze a segment of interest within that window.
> > Trying to test this I got:
> > 
> > [root@jouet ~]# perf sched timehist
> > No trace sample to read. Did you call 'perf record -R'?
> > [root@jouet ~]#
> > 
> > Could you please provide a better error message?
> 
> sure, but that error is unrelated to this patch set.

I haven't said it was... 8-) This patchset is processed and pushed out,
just doing a 'make -C tools/perf build-test' + perf test + build on lots
of containers pass before sending a pull req to Ingo,

- Arnaldo
 
> > 
> > The perf.data file had this:
> > 
> > [root@jouet ~]# perf evlist -v
> > cycles:ppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1
> > [root@jouet ~]#