* Kernelshark latency field
@ 2025-10-31 14:52 Jorge Merlino
2025-10-31 15:45 ` Steven Rostedt
0 siblings, 1 reply; 2+ messages in thread
From: Jorge Merlino @ 2025-10-31 14:52 UTC (permalink / raw)
To: linux-trace-users
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?
Thanks
Jorge
[1] https://www.kernelshark.org/Documentation.html
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Kernelshark latency field
2025-10-31 14:52 Kernelshark latency field Jorge Merlino
@ 2025-10-31 15:45 ` Steven Rostedt
0 siblings, 0 replies; 2+ messages in thread
From: Steven Rostedt @ 2025-10-31 15:45 UTC (permalink / raw)
To: Jorge Merlino; +Cc: linux-trace-users
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
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2025-10-31 15:45 ` Steven Rostedt
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