6e0e492e12
Currently for every CPU profile sample, we apply its weight to all call edges of the entire call stack. Frames higher up the stack are unlikely to be repeated calls (e.g. runtime.main calling main.main). So adding weights to call edges higher up the stack may be not reflecting the actual call edge weights in the program. This CL changes it to add weights to only the edge between the last two frames. Without a branch profile (e.g. LBR records) this is not perfect, but seems more reasonable. Change-Id: I0aee75cc608a152adad41c51120b661a6c542283 Reviewed-on: https://go-review.googlesource.com/c/go/+/450915 Run-TryBot: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Austin Clements <austin@google.com> |
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