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runtime/pprof: TestCPUProfileMultithreadMagnitude failures #55346

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gopherbot opened this issue Sep 22, 2022 · 1 comment
Open

runtime/pprof: TestCPUProfileMultithreadMagnitude failures #55346

gopherbot opened this issue Sep 22, 2022 · 1 comment
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compiler/runtime Issues related to the Go compiler and/or runtime. NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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@gopherbot
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gopherbot commented Sep 22, 2022

#!watchflakes
post <- pkg == "runtime/pprof" && test == "TestCPUProfileMultithreadMagnitude"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestCPUProfileMultithreadMagnitude (1.02s)
    pprof_test.go:123: Running on Linux 4.18.0
    --- FAIL: TestCPUProfileMultithreadMagnitude/serial (0.54s)
        pprof_test.go:189: Running with 1 workers
        pprof_test.go:524: total 19 CPU profile samples collected:
            7: 0x1758ec (runtime/pprof.cpuHog0:61 runtime/pprof.cpuHog1:55) 0x175839 (runtime/pprof.cpuHogger:41) 0x176b1b (runtime/pprof.TestCPUProfileMultithreadMagnitude.func3.1.1.1:202) labels: map[]

            6: 0x85b40 (runtime.asyncPreempt:7) 0x1758eb (runtime/pprof.cpuHog0:60 runtime/pprof.cpuHog1:55) 0x175839 (runtime/pprof.cpuHogger:41) 0x176b1b (runtime/pprof.TestCPUProfileMultithreadMagnitude.func3.1.1.1:202) labels: map[]

            3: 0x85b40 (runtime.asyncPreempt:7) 0x1758f9 (runtime/pprof.cpuHog0:62 runtime/pprof.cpuHog1:55) 0x175839 (runtime/pprof.cpuHogger:41) 0x176b1b (runtime/pprof.TestCPUProfileMultithreadMagnitude.func3.1.1.1:202) labels: map[]

            3: 0x1758fa (runtime/pprof.cpuHog0:64 runtime/pprof.cpuHog1:55) 0x175839 (runtime/pprof.cpuHogger:41) 0x176b1b (runtime/pprof.TestCPUProfileMultithreadMagnitude.func3.1.1.1:202) labels: map[]

        pprof_test.go:595: runtime/pprof.cpuHog1: 19
        pprof_test.go:226: compare 90.268ms vs 190ms
        pprof_test.go:228: compare got CPU usage reports are too different (limit -40.0%, got -52.5%) want nil
    pprof_test.go:126: Failure of this test may indicate that your system suffers from a known Linux kernel bug fixed on newer kernels. See https://golang.org/issue/49065.

watchflakes

@gopherbot gopherbot added NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. compiler/runtime Issues related to the Go compiler and/or runtime. labels Sep 22, 2022
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gopherbot commented Sep 22, 2022

Found new dashboard test flakes for:

#!watchflakes
post <- pkg == "runtime/pprof" && test == "TestCPUProfileMultithreadMagnitude"
2022-09-21 20:24 linux-s390x-ibm go@e0a364b0 runtime/pprof.TestCPUProfileMultithreadMagnitude (log)
--- FAIL: TestCPUProfileMultithreadMagnitude (1.02s)
    pprof_test.go:123: Running on Linux 4.18.0
    --- FAIL: TestCPUProfileMultithreadMagnitude/serial (0.54s)
        pprof_test.go:189: Running with 1 workers
        pprof_test.go:524: total 19 CPU profile samples collected:
            7: 0x1758ec (runtime/pprof.cpuHog0:61 runtime/pprof.cpuHog1:55) 0x175839 (runtime/pprof.cpuHogger:41) 0x176b1b (runtime/pprof.TestCPUProfileMultithreadMagnitude.func3.1.1.1:202) labels: map[]

            6: 0x85b40 (runtime.asyncPreempt:7) 0x1758eb (runtime/pprof.cpuHog0:60 runtime/pprof.cpuHog1:55) 0x175839 (runtime/pprof.cpuHogger:41) 0x176b1b (runtime/pprof.TestCPUProfileMultithreadMagnitude.func3.1.1.1:202) labels: map[]

            3: 0x85b40 (runtime.asyncPreempt:7) 0x1758f9 (runtime/pprof.cpuHog0:62 runtime/pprof.cpuHog1:55) 0x175839 (runtime/pprof.cpuHogger:41) 0x176b1b (runtime/pprof.TestCPUProfileMultithreadMagnitude.func3.1.1.1:202) labels: map[]

            3: 0x1758fa (runtime/pprof.cpuHog0:64 runtime/pprof.cpuHog1:55) 0x175839 (runtime/pprof.cpuHogger:41) 0x176b1b (runtime/pprof.TestCPUProfileMultithreadMagnitude.func3.1.1.1:202) labels: map[]

        pprof_test.go:595: runtime/pprof.cpuHog1: 19
        pprof_test.go:226: compare 90.268ms vs 190ms
        pprof_test.go:228: compare got CPU usage reports are too different (limit -40.0%, got -52.5%) want nil
    pprof_test.go:126: Failure of this test may indicate that your system suffers from a known Linux kernel bug fixed on newer kernels. See https://golang.org/issue/49065.

watchflakes

@prattmic prattmic self-assigned this Oct 5, 2022
@seankhliao seankhliao added this to the Unplanned milestone Nov 19, 2022
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Labels
compiler/runtime Issues related to the Go compiler and/or runtime. NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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