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
