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

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Date:   Thu, 16 Jun 2022 09:31:47 +0800
From:   Yang Jihong <yangjihong1@...wei.com>
To:     Namhyung Kim <namhyung@...nel.org>
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

Hello,

On 2022/6/16 6:01, Namhyung Kim wrote:
> On Tue, Jun 14, 2022 at 8:12 PM Yang Jihong <yangjihong1@...wei.com> wrote:
>>
>> Hello,
>>
>> On 2022/6/15 5:49, Namhyung Kim wrote:
>>> 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..
>>>
>> How about calling it "work_atoms" ?
>> Otherwise, "work" feels a little similar to kwork_class in the first step.
> 
> Didn't you already have "atom"?  I think we can have a hierarchy like
> class (IRQ) - work (eth0) - atom.
OK, I'll modify it in next version according to this hierarchy.

Thanks,
Jihong
.