Re: [lttng-dev] Monitor user space threads without user events

Hi Kienan,

Thank you very much !
Zvika

On Mon, Apr 15, 2024 at 9:25 PM Kienan Stewart via lttng-dev <
[email protected]> wrote:

> Hi Zvika,
>
> with a session that has kernel events enabled, I think you could use the
> sched_switch event.
>
> thanks,
> kienan
>
> On 4/6/24 12:20 AM, Zvi Vered via lttng-dev wrote:
> > Hello,
> >
> > My user space process contains 2 threads:
> >
> > First thread is blocked upon a kernel event created by a hardware
> > interrupt handled by the kernel.
> > The  thread is sending ioctl which is blocked till this interrupt occurs.
> >
> > Second thread has just a 5msec sleep. It does something and then sleeps
> > for 5msec. Forever.
> >
> > Is it possible to see when each thread is running (and not blocked or
> > sleeps) ?
> > I know how to do it with user events. I wonder if it's possible without
> > any extra code.
> >
> > Thank you,
> > Zvika
> >
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