runtime: TestPingPongHog failures

[gopherbot]

#!watchflakes
post <- pkg == "runtime" && test == "TestPingPongHog"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestPingPongHog
    proc_test.go:490: want hogCount/lightCount in [0.05, 20]; got 8000000/174000 = 45.97701149425287
--- FAIL: TestPingPongHog (0.19s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime" && test == "TestPingPongHog"

2024-01-09 18:17 go1.21-darwin-amd64-longtest release-branch.go1.21@cc85462b runtime.TestPingPongHog (log)

=== RUN   TestPingPongHog
    proc_test.go:490: want hogCount/lightCount in [0.05, 20]; got 8000000/174000 = 45.97701149425287
--- FAIL: TestPingPongHog (0.19s)

— watchflakes

[bcmills]

See previously:

• runtime: TestPingPongHog fails randomly #52421
• runtime: TestPingPongHog failures with ratios out of range #52207
• runtime: TestPingPongHog fails in race mode #38266
• runtime: TestPingPongHog fail randomly on linux/arm64 #20494

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime" && test == "TestPingPongHog"

2024-02-02 16:26 go1.21-darwin-amd64-longtest release-branch.go1.21@2fdad8af runtime.TestPingPongHog (log)

=== RUN   TestPingPongHog
    proc_test.go:490: want hogCount/lightCount in [0.05, 20]; got 29000000/44000 = 659.0909090909091
--- FAIL: TestPingPongHog (0.12s)

— watchflakes

[mknyszek]

@prattmic Since this only happened twice on Darwin LUCI machines, do you think there's a chance this is related to some of the recent machine instability on LUCI? Thanks.

[prattmic]

Maybe? It's hard to say. FWIW, both of the failures above were on the same (non-MacService) machine.

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime" && test == "TestPingPongHog"

2024-02-24 19:36 gotip-darwin-amd64-longtest go@e0fc269f runtime.TestPingPongHog (log)

=== RUN   TestPingPongHog
    proc_test.go:490: want hogCount/lightCount in [0.05, 20]; got 24000000/1000 = 24000
--- FAIL: TestPingPongHog (0.11s)

2024-02-26 20:46 gotip-darwin-amd64-longtest go@4760b333 runtime.TestPingPongHog (log)

=== RUN   TestPingPongHog
    proc_test.go:490: want hogCount/lightCount in [0.05, 20]; got 60000000/2511000 = 23.894862604540023
--- FAIL: TestPingPongHog (0.12s)

2024-02-27 02:20 gotip-darwin-amd64-longtest go@ccbc725f runtime.TestPingPongHog (log)

=== RUN   TestPingPongHog
    proc_test.go:490: want hogCount/lightCount in [0.05, 20]; got 69000000/1135000 = 60.79295154185022
--- FAIL: TestPingPongHog (0.10s)

2024-02-27 16:21 gotip-darwin-amd64-longtest go@f326b3e2 runtime.TestPingPongHog (log)

=== RUN   TestPingPongHog
    proc_test.go:490: want hogCount/lightCount in [0.05, 20]; got 27000000/1000 = 27000
--- FAIL: TestPingPongHog (0.12s)

— watchflakes

[bcmills]

Another one of these on a gotip-darwin-amd64-longtest LUCI TryBot (on https://go.dev/cl/559075):
https://ci.chromium.org/ui/p/golang/builders/try/gotip-darwin-amd64-longtest/b8755355334872724865/test-results?q=ExactID%3Aruntime.TestPingPongHog+VHash%3Ae944b7c7cf3f4f4b&clean=&sortby=&groupby=