From: "Jin, Yao" <yao.jin@linux.intel.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: jolsa@kernel.org, peterz@infradead.org, mingo@redhat.com,
alexander.shishkin@linux.intel.com, Linux-kernel@vger.kernel.org,
ak@linux.intel.com, kan.liang@intel.com, yao.jin@intel.com
Subject: Re: [PATCH v6 7/7] perf diff: Support hot streams comparison
Date: Sat, 19 Sep 2020 12:41:35 +0800 [thread overview]
Message-ID: <a0eabcde-d498-2ec5-af4f-998380951782@linux.intel.com> (raw)
In-Reply-To: <20200917202608.GF1431236@kernel.org>
Hi Arnaldo,
On 9/18/2020 4:26 AM, Arnaldo Carvalho de Melo wrote:
> Em Fri, Sep 11, 2020 at 04:03:53PM +0800, Jin Yao escreveu:
>> This patch enables perf-diff with "--stream" option.
>>
>> "--stream": Enable hot streams comparison
>>
>> Now let's see examples.
>>
>> perf record -b ... Generate perf.data.old with branch data
>> perf record -b ... Generate perf.data with branch data
>> perf diff --stream
>>
>> [ Matched hot streams ]
>>
>> hot chain pair 1:
>> cycles: 1, hits: 27.77% cycles: 1, hits: 9.24%
>> --------------------------- --------------------------
>> main div.c:39 main div.c:39
>> main div.c:44 main div.c:44
>>
>> hot chain pair 2:
>> cycles: 34, hits: 20.06% cycles: 27, hits: 16.98%
>> --------------------------- --------------------------
>> __random_r random_r.c:360 __random_r random_r.c:360
>
> Would it be interesting to get the associated source code and show right below
> these file:number lines?
>
> - Arnaldo
>
I'm thinking we can implement this function in callchain_list__sym_name(), and then all callchain
functionality will benefit from it. While that looks to be another patchset. :)
Thanks
Jin Yao
next prev parent reply other threads:[~2020-09-19 4:42 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-11 8:03 [PATCH v6 0/7] perf: Stream comparison Jin Yao
2020-09-11 8:03 ` [PATCH v6 1/7] perf util: Create streams Jin Yao
2020-09-17 20:20 ` Arnaldo Carvalho de Melo
2020-09-11 8:03 ` [PATCH v6 2/7] perf util: Get the evsel_streams by evsel_idx Jin Yao
2020-09-17 20:23 ` Arnaldo Carvalho de Melo
2020-09-11 8:03 ` [PATCH v6 3/7] perf util: Compare two streams Jin Yao
2020-09-11 8:03 ` [PATCH v6 4/7] perf util: Link stream pair Jin Yao
2020-09-17 20:23 ` Arnaldo Carvalho de Melo
2020-09-11 8:03 ` [PATCH v6 5/7] perf util: Calculate the sum of total streams hits Jin Yao
2020-09-11 8:03 ` [PATCH v6 6/7] perf util: Report hot streams Jin Yao
2020-09-11 8:03 ` [PATCH v6 7/7] perf diff: Support hot streams comparison Jin Yao
2020-09-17 20:26 ` Arnaldo Carvalho de Melo
2020-09-18 6:58 ` Jin, Yao
2020-09-19 4:41 ` Jin, Yao [this message]
2020-09-21 12:17 ` Arnaldo Carvalho de Melo
2020-09-17 13:05 ` [PATCH v6 0/7] perf: Stream comparison Jiri Olsa
2020-09-17 20:13 ` Arnaldo Carvalho de Melo
2020-09-18 6:54 ` Jin, Yao
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