linux-kernel - Re: [RFC 06/13] perf kwork: Implement perf kwork report

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Date:   Tue, 14 Jun 2022 14:49:56 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Yang Jihong <yangjihong1@...wei.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-perf-users <linux-perf-users@...r.kernel.org>
Subject: Re: [RFC 06/13] perf kwork: Implement perf kwork report

On Mon, Jun 13, 2022 at 2:48 AM Yang Jihong <yangjihong1@...wei.com> wrote:
>
> Implements framework of perf kwork report, which is used to report time
> properties such as run time and frequency:
>
> test case:
>
>   Kwork Name                | Cpu  | Avg delay     | Frequency | Max delay     | Max delay start     | Max delay end       |
>  ---------------------------------------------------------------------------------------------------------------------------
>  ---------------------------------------------------------------------------------------------------------------------------
>
> Since there are no report supported events, the output is empty.
>
> Briefly describe the data structure:
> 1. "class" indicates event type. For example, irq and softiq correspond
> to different types.
> 2. "cluster" refers to a specific event corresponding to a type. For
> example, RCU and TIMER in softirq correspond to different clusters,
> which contains three types of events: raise, entry, and exit.

I'm not good at naming but how about calling it "work" instead?
It's all about kernel works anyway..

Thanks,
Namhyung


> 3. "atom" includes time of each sample and sample of the previous phase.
> (For example, exit corresponds to entry, which is used for timehist.)
>
> Signed-off-by: Yang Jihong <yangjihong1@...wei.com>