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Merge pull request #135464 from MikeSpreitzer/better-concurrency-test-margin

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Relax the noise margin threshold in TestConcurrencyIsolation
This commit is contained in:
Kubernetes Prow Robot
2026-02-10 10:30:04 +05:30
committed by GitHub
parent 1955210d81 981b46e3ec
commit 0bb75334dd
1 changed files with 3 additions and 4 deletions
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7
test/integration/apiserver/flowcontrol/concurrency_util_test.go
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@@ -279,10 +279,9 @@ func TestConcurrencyIsolation(t *testing.T) {
// There are uncontrolled overheads that introduce noise into the system. The coefficient of variation (CV), that is,
// standard deviation divided by mean, for a class of traffic is a characterization of all the noise that applied to
// that class. We found that noxu1 generally had a much bigger CV than noxu2. This makes sense, because noxu1 probes
// more behavior --- the waiting in queues. So we take the minimum of the two as an indicator of the relative amount
// of noise that comes from all the other behavior. Currently, we use 3 times the experienced coefficient of variation
// as the margin of error.
margin := 3 * math.Min(noxu1LatStats.cv, noxu2LatStats.cv)
// more behavior --- the waiting in queues. Both are relevant, so we mix them to get the
// threshold to apply in this test.
margin := noxu1LatStats.cv + 2*noxu2LatStats.cv
t.Logf("Error margin is %v", margin)
isConcurrencyExpected := func(name string, observed float64, expected float64) bool {