path: root/tools/perf/arch
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authorAndi Kleen <ak@linux.intel.com>2019-06-24 12:37:10 -0700
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-07-01 22:50:41 -0300
commit2f87f33f4226523df9c9cc28f9874ea02fcc3d3f (patch)
tree53bd617dcee59f4fa9f9c0b6bd8708468e555321 /tools/perf/arch
parentperf stat: Don't merge events in the same PMU (diff)
perf stat: Fix group lookup for metric group
The metric group code tries to find a group it added earlier in the evlist. Fix the lookup to handle groups with partially overlaps correctly. When a sub string match fails and we reset the match, we have to compare the first element again. I also renamed the find_evsel function to find_evsel_group to make its purpose clearer. With the earlier changes this fixes: Before: % perf stat -M UPI,IPC sleep 1 ... 1,032,922 uops_retired.retire_slots # 1.1 UPI 1,896,096 inst_retired.any 1,896,096 inst_retired.any 1,177,254 cpu_clk_unhalted.thread After: % perf stat -M UPI,IPC sleep 1 ... 1,013,193 uops_retired.retire_slots # 1.1 UPI 932,033 inst_retired.any 932,033 inst_retired.any # 0.9 IPC 1,091,245 cpu_clk_unhalted.thread Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Fixes: b18f3e365019 ("perf stat: Support JSON metrics in perf stat") Link: http://lkml.kernel.org/r/20190624193711.35241-4-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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