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SubjectRe: [PATCH v5 2/6] perf record: Get the first sample time and last sample time
On Tue, Oct 24, 2017 at 10:03:05AM +0800, Jin, Yao wrote:


> > hum, could you still unset the sample if there's no time given?
> > and keep the speed in this case..
> >
> > jirka
> >
> Hi Jiri,
> I check this question again. The '--time' option is for perf report but not
> for perf record.
> For perf record, we have to always walk on all samples to get the time of
> first sample and the time of last sample whatever buildid_all is enabled or
> not enabled. So 'rec->tool.sample = NULL' is removed.
> Sorry, the previous mail was replied at midnight, I was drowsy. :(
> If my answer is correct, I will not send v6. If my understanding is still
> not correct, please let me know.

right, I did not realize we store this unconditionaly.. then yes, it's ok

I think I've already acked this, anyway for the patchset:

Acked-by: Jiri Olsa <>


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