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

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