[PATCH v4 0/7] perf: Stream comparison

2020-08-25 Thread Jin Yao
Sometimes, a small change in a hot function reducing the cycles of this function, but the overall workload doesn't get faster. It is interesting where the cycles are moved to. What it would like is to diff before/after streams. The stream is the branch history which is aggregated by the branch

[PATCH v4 0/7] perf: Stream comparison

2020-05-26 Thread Jin Yao
Sometimes, a small change in a hot function reducing the cycles of this function, but the overall workload doesn't get faster. It is interesting where the cycles are moved to. What it would like is to diff before/after streams. The stream is the branch history which is aggregated by the branch