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

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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