* stopping ftrace on event
@ 2022-07-06 8:50 Benjamin Steinke
2022-07-06 11:31 ` Daniel Bristot de Oliveira
0 siblings, 1 reply; 3+ messages in thread
From: Benjamin Steinke @ 2022-07-06 8:50 UTC (permalink / raw)
To: linux-rt-users
Hi all,
I'm hunting sporadic high irq-handler latencies in a pcie driver by using
ftrace. I'm currently using trace-cmd record but get way to large files due to
the event being so infrequent.
Is there a way to stop tracing or dump the current trace buffer when a specific
event occurs?
Thanks for your help,
Benjamin
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: stopping ftrace on event
2022-07-06 8:50 stopping ftrace on event Benjamin Steinke
@ 2022-07-06 11:31 ` Daniel Bristot de Oliveira
2022-07-06 11:51 ` Benjamin Steinke
0 siblings, 1 reply; 3+ messages in thread
From: Daniel Bristot de Oliveira @ 2022-07-06 11:31 UTC (permalink / raw)
To: Benjamin Steinke; +Cc: linux-rt-users, linux-trace-devel@vger.kernel.org
On 7/6/22 10:50, Benjamin Steinke wrote:
> Hi all,
>
> I'm hunting sporadic high irq-handler latencies in a pcie driver by using
> ftrace. I'm currently using trace-cmd record but get way to large files due to
> the event being so infrequent.
>
> Is there a way to stop tracing or dump the current trace buffer when a specific
> event occurs?
https://www.kernel.org/doc/html/latest/trace/events.html#event-triggers ?
-- Daniel
> Thanks for your help,
> Benjamin
>
>
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: stopping ftrace on event
2022-07-06 11:31 ` Daniel Bristot de Oliveira
@ 2022-07-06 11:51 ` Benjamin Steinke
0 siblings, 0 replies; 3+ messages in thread
From: Benjamin Steinke @ 2022-07-06 11:51 UTC (permalink / raw)
To: Daniel Bristot de Oliveira
Cc: linux-rt-users, linux-trace-devel@vger.kernel.org
Am Mittwoch, 6. Juli 2022, 13:31:00 CEST schrieb Daniel Bristot de Oliveira:
> On 7/6/22 10:50, Benjamin Steinke wrote:
> > Hi all,
> >
> > I'm hunting sporadic high irq-handler latencies in a pcie driver by using
> > ftrace. I'm currently using trace-cmd record but get way to large files
> > due to the event being so infrequent.
> >
> > Is there a way to stop tracing or dump the current trace buffer when a
> > specific event occurs?
>
> https://www.kernel.org/doc/html/latest/trace/events.html#event-triggers ?
Oh, didn't see the forest for the trees. I probably scrolled a number of times
over this section. Thanks a lot.
>
> -- Daniel
>
> > Thanks for your help,
> > Benjamin
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-07-06 8:50 stopping ftrace on event Benjamin Steinke
2022-07-06 11:31 ` Daniel Bristot de Oliveira
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