On Fri, 2014-09-26 at 20:25 +0100, David Ahern wrote:
> On 9/26/14, 9:05 AM, Pawel Moll wrote:
> > To do the correlation you need both timestamps to be "taken"
> > simultaneously:
> >
> > perf event user event
> > -O--+-O--> t_mono
> >
On 9/26/14, 9:05 AM, Pawel Moll wrote:
To do the correlation you need both timestamps to be "taken"
simultaneously:
perf event user event
-O--+-O--> t_mono
: | :
: V :
On Fri, 2014-09-26 at 15:38 +0100, Namhyung Kim wrote:
> > Then I have loads of normal normal samples, timestamped with sched clock
> > only, and every now and then one with both timestamps which then I can
> > use for time correlation. The whole point is that the frequency of such
> > "synchronisa
2014-09-26 (금), 11:58 +0100, Pawel Moll:
> On Fri, 2014-09-26 at 07:16 +0100, Namhyung Kim wrote:
> > > It would be doable, I guess, but what
> > > if someone *wants* to have sched clock as the timestamps source (because
> > > it's cheap) but still be able to correlate them with userspace? In this
On Fri, 2014-09-26 at 07:16 +0100, Namhyung Kim wrote:
> > It would be doable, I guess, but what
> > if someone *wants* to have sched clock as the timestamps source (because
> > it's cheap) but still be able to correlate them with userspace? In this
> > case two separate timestamps are required to
Hi Pawel,
On Thu, 25 Sep 2014 11:49:58 +0100, Pawel Moll wrote:
> On Wed, 2014-09-24 at 06:41 +0100, Namhyung Kim wrote:
>> Hi Pawel,
>>
>> On Tue, 23 Sep 2014 18:03:06 +0100, Pawel Moll wrote:
>> > This patch adds an option to sample raw monotonic clock
>> > value with any perf event, with the
On Wed, 2014-09-24 at 06:41 +0100, Namhyung Kim wrote:
> Hi Pawel,
>
> On Tue, 23 Sep 2014 18:03:06 +0100, Pawel Moll wrote:
> > This patch adds an option to sample raw monotonic clock
> > value with any perf event, with the the aim of allowing
> > time correlation between data coming from perf an
Hi Pawel,
On Tue, 23 Sep 2014 18:03:06 +0100, Pawel Moll wrote:
> This patch adds an option to sample raw monotonic clock
> value with any perf event, with the the aim of allowing
> time correlation between data coming from perf and
> additional performance-related information generated in
> users
This patch adds an option to sample raw monotonic clock
value with any perf event, with the the aim of allowing
time correlation between data coming from perf and
additional performance-related information generated in
userspace.
In order to correlate timestamps in perf data stream
with events hap
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