From: Steven Rostedt <rostedt@goodmis.org>
To: Jorge Merlino <jorge.merlino@canonical.com>
Cc: linux-trace-users@vger.kernel.org
Subject: Re: Kernelshark latency field
Date: Fri, 31 Oct 2025 11:45:32 -0400 [thread overview]
Message-ID: <20251031114532.37f30c8a@gandalf.local.home> (raw)
In-Reply-To: <fe35c5eb-7132-4203-9d6f-0a8272b114fa@canonical.com>
On Fri, 31 Oct 2025 11:52:59 -0300
Jorge Merlino <jorge.merlino@canonical.com> wrote:
> Hi folks,
>
> I've been using kernelshark 2.2.1 and have noticed that the latency
> field on the grid has five chars in it. The documentation [1] only
> mention 4 fields. Anyone knows what the fifth is for?
Ah thanks for letting us know. I should update the documentation.
The fifth field is "migration disabled counter". It still allows the task
to be preempted by another task, but it will temporarily pin that task to
the CPU. It's a new feature to the Linux kernel and was introduced in 5.11.
-- Steve
prev parent reply other threads:[~2025-10-31 15:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-31 14:52 Kernelshark latency field Jorge Merlino
2025-10-31 15:45 ` Steven Rostedt [this message]
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