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*: stable TestGlobalMemoryTuner (#43037)

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close pingcap/tidb#43036
This commit is contained in:
Weizhen Wang
2023-04-13 19:03:10 +08:00
committed by GitHub
parent 49748c4e92
commit 374684f1fa
1 changed files with 15 additions and 11 deletions
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26
util/gctuner/memory_limit_tuner_test.go
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@ -93,29 +93,33 @@ func TestGlobalMemoryTuner(t *testing.T) {
gcNum := getNowGCNum()
memory210mb := allocator.alloc(210 << 20)
time.Sleep(100 * time.Millisecond)
require.True(t, GlobalMemoryLimitTuner.waitingReset.Load())
require.True(t, gcNum < getNowGCNum())
require.Eventually(t, func() bool {
return GlobalMemoryLimitTuner.waitingReset.Load() && gcNum < getNowGCNum()
}, 5*time.Second, 100*time.Millisecond)
// Test waiting for reset
time.Sleep(500 * time.Millisecond)
require.Equal(t, GlobalMemoryLimitTuner.calcMemoryLimit(fallbackPercentage), debug.SetMemoryLimit(-1))
require.Eventually(t, func() bool {
return GlobalMemoryLimitTuner.calcMemoryLimit(fallbackPercentage) == debug.SetMemoryLimit(-1)
}, 5*time.Second, 100*time.Millisecond)
gcNum = getNowGCNum()
memory100mb := allocator.alloc(100 << 20)
time.Sleep(100 * time.Millisecond)
require.Equal(t, gcNum, getNowGCNum()) // No GC
require.Eventually(t, func() bool {
return gcNum == getNowGCNum()
}, 5*time.Second, 100*time.Millisecond) // No GC
allocator.free(memory210mb)
allocator.free(memory100mb)
runtime.GC()
// Trigger GC in 80% again
time.Sleep(500 * time.Millisecond)
require.Equal(t, GlobalMemoryLimitTuner.calcMemoryLimit(GlobalMemoryLimitTuner.GetPercentage()), debug.SetMemoryLimit(-1))
require.Eventually(t, func() bool {
return GlobalMemoryLimitTuner.calcMemoryLimit(GlobalMemoryLimitTuner.GetPercentage()) == debug.SetMemoryLimit(-1)
}, 5*time.Second, 100*time.Millisecond)
time.Sleep(100 * time.Millisecond)
gcNum = getNowGCNum()
checkNextGCEqualMemoryLimit()
memory210mb = allocator.alloc(210 << 20)
time.Sleep(100 * time.Millisecond)
require.True(t, gcNum < getNowGCNum())
require.Eventually(t, func() bool {
return gcNum < getNowGCNum()
}, 5*time.Second, 100*time.Millisecond)
allocator.free(memory210mb)
allocator.free(memory600mb)
}