From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: "marc.straemke" <marc.straemke@eltropuls.de>
Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org
Subject: Re: Latency spikes on V6.15.1 Preempt RT and maybe related to intel? IGB
Date: Fri, 13 Jun 2025 21:58:38 +0200 [thread overview]
Message-ID: <20250613195838.0-gZ6bqS@linutronix.de> (raw)
In-Reply-To: <E1uQ6I0-000000003aa-37uJ@smtprelay05.ispgateway.de>
On 2025-06-13 17:26:15 [+0200], marc.straemke wrote:
> Thanks Sebastian, I will do that tomorrow.To confirm: Just pure event
> tracing without the function tracer? (After enabling the sched
> events)Regards,Marc
The event tracing should narrow down which of the tasks cause the spike.
So if you say it is the ip comment then you should see ip.
Step two would be the function tracer to narrow it down further. You
could start right away with the function tracer to see where the big gap
is.
rtla could speed up the whole process (via the timerlat auto analysis).
Sebastian
next prev parent reply other threads:[~2025-06-13 19:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-10 11:23 Latency spikes on V6.15.1 Preempt RT and maybe related to intel IGB Marc Strämke
2025-06-13 14:54 ` Sebastian Andrzej Siewior
[not found] ` <E1uQ6I0-000000003aa-37uJ@smtprelay05.ispgateway.de>
2025-06-13 19:58 ` Sebastian Andrzej Siewior [this message]
2025-06-14 8:52 ` Latency spikes on V6.15.1 Preempt RT and maybe related to intel? IGB Marc Strämke
2025-06-16 15:10 ` Marc Strämke
2025-06-17 9:16 ` Sebastian Andrzej Siewior
2025-06-17 9:08 ` Sebastian Andrzej Siewior
2025-06-17 9:28 ` Sebastian Andrzej Siewior
2025-06-17 9:45 ` Marc Strämke
2025-06-17 10:00 ` Sebastian Andrzej Siewior
2025-06-17 10:03 ` Marc Strämke
2025-06-17 10:15 ` Sebastian Andrzej Siewior
2025-06-17 10:54 ` Kurt Kanzenbach
[not found] ` <19a46896-3d26-415b-9820-730a42b0702e@eltropuls.de>
2025-06-17 13:35 ` Kurt Kanzenbach
[not found] ` <522704b0-5a35-42c3-9bcc-627b487b740c@eltropuls.de>
2025-06-14 18:13 ` Latency spikes on V6.15.1 Preempt RT and maybe related to intel IGB Sebastian Andrzej Siewior
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