linux-kernel - Re: [PATCH v3 5/6] perf report: support time percent and multiple time ranges

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Message-ID: <af909961-8069-a18b-bca4-0ec28c2ea63f@linux.intel.com>
Date:   Mon, 2 Oct 2017 20:57:48 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v3 5/6] perf report: support time percent and multiple
 time ranges



On 10/2/2017 7:52 PM, Jiri Olsa wrote:
> On Thu, Sep 28, 2017 at 08:45:20PM +0800, Jin Yao wrote:
>> perf report has a --time option to limit the time range of output.
>> It only supports absolute time.
>>
>> Now this option is extended to support multiple time ranges and
>> support the percent of time.
>>
>> For example:
>>
>> 1. Select the first and second 10% time slices
>> perf report --time 10%/1,10%/2
> 
> hum, this one passes:
> 
> [jolsa@...va perf]$ ./perf script --time 10%/10x12321xsdfdasfdsafdsafdsa
>              yes 20923 218485.067881:    9263754 cycles:ppp:  ffffffffa4263cca __vfs_write ([kernel.kallsyms])
>              yes 20923 218485.070805: 6734429666984 cycles:ppp:  ffffffffa42659e3 sys_write ([kernel.kallsyms])
>              yes 20923 218485.181272:    6927427 cycles:ppp:  ffffffffa42643b3 vfs_write ([kernel.kallsyms])
>              yes 20923 218485.183446: 7696489147307 cycles:ppp:  ffffffffa442a9ee lockref_put_return ([kernel.kallsyms])
>              yes 20923 218485.292921:    9265358 cycles:ppp:      5648b27c63b0 _init (/usr/bin/yes)
>              yes 20923 218485.295866: 6734429665913 cycles:ppp:  ffffffffa42641b7 rw_verify_area ([kernel.kallsyms])
>              yes 20923 218485.406225:    6930289 cycles:ppp:  ffffffffa42ab8dd __fsnotify_parent ([kernel.kallsyms])
>              yes 20923 218485.408399: 7696489149499 cycles:ppp:  ffffffffa426418f rw_verify_area ([kernel.kallsyms])
>              yes 20923 218485.517885:    9266280 cycles:ppp:  ffffffffa42ab926 __fsnotify_parent ([kernel.kallsyms])
>              yes 20923 218485.520860: 6734429663933 cycles:ppp:      5648b27c6ccb full_write (/usr/bin/yes)
> 
> please add a test for this
> 
> jirka
>

Sorry, I will add test for checking this case.

Thanks
Jin Yao