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

From: Zvi Vered via lttng-dev <lttng-dev@lists.lttng.org>
To: Kienan Stewart <kstewart@efficios.com>
Cc: lttng-dev@lists.lttng.org
Subject: Re: [lttng-dev] Monitor user space threads without user events
Date: Mon, 15 Apr 2024 21:42:45 +0300	[thread overview]
Message-ID: <CABRndgwjUxyj0Qzxynd=c8KET1zS744F678er8m7qY_LE1DJVA@mail.gmail.com> (raw)
In-Reply-To: <6e1feec7-7b25-4654-af4b-7ed942e4accb@efficios.com>

[-- Attachment #1.1: Type: text/plain, Size: 1286 bytes --]

Hi Kienan,

Thank you very much !
Zvika

On Mon, Apr 15, 2024 at 9:25 PM Kienan Stewart via lttng-dev <
lttng-dev@lists.lttng.org> 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
> >
> > _______________________________________________
> > lttng-dev mailing list
> > lttng-dev@lists.lttng.org
> > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>

[-- Attachment #1.2: Type: text/html, Size: 2094 bytes --]

[-- Attachment #2: Type: text/plain, Size: 156 bytes --]

_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev