7b1f8b62be
The CPU profiler adds goroutine labels to its samples based on getg().m.curg. That allows the profile to correctly attribute work that the runtime does on behalf of that goroutine on the M's g0 stack via systemstack calls, such as using runtime.Callers to record the call stack. Those labels also cover work on the g0 stack via mcall. When the active goroutine calls runtime.Gosched, it will receive attribution of its share of the scheduler work necessary to find the next runnable goroutine. The execution tracer's attribution of CPU samples to specific goroutines should match. When curg is set, attribute the CPU samples to that goroutine's ID. Fixes #52693 Change-Id: Ic9af92e153abd8477559e48bc8ebaf3739527b94 Reviewed-on: https://go-review.googlesource.com/c/go/+/404055 Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Bryan Mills <bcmills@google.com> Run-TryBot: Rhys Hiltner <rhys@justin.tv> TryBot-Result: Gopher Robot <gobot@golang.org> |
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