d1640d8652
TestCPUProfileMultithreadMagnitude compares pprof results vs OS rusage to verify that pprof is capturing all CPU usage. Presently it compares the sum of cpuHog1 samples vs rusage. However, background usage from the scheduler, GC, etc can cause additional CPU usage causing test failures if rusage is too far off from the cpuHog1 samples. That said, this test doesn't actually need to care about cpuHog1 samples. It simply cares that pprof samples match rusage, not what the breakdown of usage was. As a result, we can compare the sum of _all_ pprof samples vs rusage, which should implicitly include any background CPU usage. Fixes #50097. Change-Id: I649a18de5b3dcf58b62be5962fa508d14cd4dc79 Reviewed-on: https://go-review.googlesource.com/c/go/+/379535 Trust: Michael Pratt <mpratt@google.com> Run-TryBot: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> |
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