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

[Kienan Stewart]

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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