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Add regression test for CPUManager distribute NUMA algorithm

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We witnessed this exact allocation attempt in a live cluster and witnessed the
algorithm fail with an accounting error. This test was added to verify that
this case is now handled by the updates to the algorithm and that we don't
regress from it in the future.

"test" description="ensure previous failure encountered on live machine has been fixed (1/1)"
"combo remainderSet balance" combo=[2 4 6] remainderSet=[2 4 6] distribution=9 remainder=1 available=[14 2 4 4 0 3 4 1] balance=4.031
"combo remainderSet balance" combo=[2 4 6] remainderSet=[2 4] distribution=9 remainder=1 available=[0 3 4 1 14 2 4 4] balance=4.031
"combo remainderSet balance" combo=[2 4 6] remainderSet=[2 6] distribution=9 remainder=1 available=[1 14 2 4 4 0 3 4] balance=4.031
"combo remainderSet balance" combo=[2 4 6] remainderSet=[4 6] distribution=9 remainder=1 available=[1 3 4 0 14 2 4 4] balance=4.031
"combo remainderSet balance" combo=[2 4 6] remainderSet=[2] distribution=9 remainder=1 available=[4 0 3 4 1 14 2 4] balance=4.031
"combo remainderSet balance" combo=[2 4 6] remainderSet=[4] distribution=9 remainder=1 available=[3 4 0 14 2 4 4 1] balance=4.031
"combo remainderSet balance" combo=[2 4 6] remainderSet=[6] distribution=9 remainder=1 available=[1 13 2 4 4 1 3 4] balance=3.606
"bestCombo found" distribution=9 bestCombo=[2 4 6] bestRemainder=[6]

Signed-off-by: Kevin Klues <kklues@nvidia.com>
This commit is contained in:
Kevin Klues
2021-11-24 20:45:53 +00:00
parent e284c74d93
commit f8511877e2
2 changed files with 291 additions and 0 deletions
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9
pkg/kubelet/cm/cpumanager/cpu_assignment_test.go
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@@ -845,6 +845,15 @@ func TestTakeByTopologyNUMADistributed(t *testing.T) {
"",
mustParseCPUSet(t, "0-3,10-13,20-23,30-34,40-43,50-53,60-63,70-74"),
},
{
"ensure previous failure encountered on live machine has been fixed (1/1)",
topoDualSocketMultiNumaPerSocketHTLarge,
mustParseCPUSet(t, "0,128,30,31,158,159,43-47,171-175,62,63,190,191,75-79,203-207,94,96,222,223,101-111,229-239,126,127,254,255"),
28,
1,
"",
mustParseCPUSet(t, "43-47,75-79,96,101-105,171-174,203-206,229-232"),
},
}...)
for _, tc := range testCases {