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SubjectRe: [PATCH 0/2] tracing/hist: Add percentage histogram suffixes
On Mon, 1 Aug 2022 16:58:40 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> On Mon, 1 Aug 2022 12:00:40 +0900
> "Masami Hiramatsu (Google)" <mhiramat@kernel.org> wrote:
>
> > Here are a couple of patches to add .percent and .graph histogram
> > value suffixes to show the value in percentage and in bar-graph.
> >
> > This will help us to check the trend of the histogram instantly
> > without the post processing tool.
> >
> > Here shows the example of the percentage and the bar graph of
> > the runtime of the running tasks.
> >
> > /sys/kernel/tracing # echo hist:keys=pid:vals=runtime.percent,runtime.graph:sort
> > =pid >> events/sched/sched_stat_runtime/trigger
> > /sys/kernel/tracing # sleep 10
> > /sys/kernel/tracing # cat events/sched/sched_stat_runtime/hist
> > # event histogram
> > #
> > # trigger info: hist:keys=pid:vals=hitcount,runtime.percent,runtime.graph:sort=pid:size=2048 [active]
> > #
> >
> > { pid: 8 } hitcount: 11 runtime: 4.11 runtime: #
> > { pid: 9 } hitcount: 4 runtime: 1.28 runtime:
> > { pid: 14 } hitcount: 10 runtime: 2.22 runtime:
> > { pid: 15 } hitcount: 1 runtime: 0.07 runtime:
> > { pid: 16 } hitcount: 21 runtime: 3.35 runtime: #
> > { pid: 57 } hitcount: 6 runtime: 2.41 runtime: #
> > { pid: 61 } hitcount: 42 runtime: 9.79 runtime: ####
> > { pid: 66 } hitcount: 5 runtime: 0.69 runtime:
> > { pid: 147 } hitcount: 36 runtime: 45.33 runtime: ####################
> > { pid: 8548 } hitcount: 9 runtime: 17.25 runtime: #######
> > { pid: 8549 } hitcount: 8 runtime: 13.43 runtime: #####
> >
> > Totals:
> > Hits: 153
> > Entries: 11
> > Dropped: 0
> >
>
> Hi Masami,
>
> Thanks for this as well. But as it's a new feature, and I freeze new
> features when the merge window starts, I'll add this to my queue for the
> next window.

Yeah, that's no problem. Please queue it for the next window :)

Thank you!

>
> -- Steve


--
Masami Hiramatsu (Google) <mhiramat@kernel.org>

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