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Short-circuit CPUManager distribute NUMA algo for unusable cpuGroupSize

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Signed-off-by: Kevin Klues <kklues@nvidia.com>
This commit is contained in:
Kevin Klues 2021-11-24 14:10:50 +00:00
parent b28c1392d7
commit c8559bc43e
1 changed files with 8 additions and 0 deletions
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8
pkg/kubelet/cm/cpumanager/cpu_assignment.go
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@ -534,6 +534,14 @@ func takeByTopologyNUMAPacked(topo *topology.CPUTopology, availableCPUs cpuset.C
// important, for example, to ensure that all CPUs (i.e. all hyperthreads) from
// a single core are allocated together.
func takeByTopologyNUMADistributed(topo *topology.CPUTopology, availableCPUs cpuset.CPUSet, numCPUs int, cpuGroupSize int) (cpuset.CPUSet, error) {
// If the number of CPUs requested cannot be handed out in chunks of
// 'cpuGroupSize', then we just call out the packing algorithm since we
// can't distribute CPUs in this chunk size.
if (numCPUs % cpuGroupSize) != 0 {
return takeByTopologyNUMAPacked(topo, availableCPUs, numCPUs)
}
// Otherwise build an accumulator to start allocating CPUs from.
acc := newCPUAccumulator(topo, availableCPUs, numCPUs)
if acc.isSatisfied() {
return acc.result, nil