volcano.sh/volcano@v1.9.0/pkg/scheduler/plugins/numaaware/policy/policy_single_numa_node.go (about)

     1  /*
     2  Copyright 2021 The Volcano Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package policy
    18  
    19  import "k8s.io/klog/v2"
    20  
    21  type policySingleNumaNode struct {
    22  	numaNodes []int
    23  }
    24  
    25  // NewPolicySingleNumaNode return a new policy interface
    26  func NewPolicySingleNumaNode(numaNodes []int) Policy {
    27  	return &policySingleNumaNode{numaNodes: numaNodes}
    28  }
    29  
    30  func (policy *policySingleNumaNode) canAdmitPodResult(hint *TopologyHint) bool {
    31  	return hint.Preferred
    32  }
    33  
    34  // Return hints that have valid bitmasks with exactly one bit set.
    35  func filterSingleNumaHints(allResourcesHints [][]TopologyHint) [][]TopologyHint {
    36  	var filteredResourcesHints [][]TopologyHint
    37  	for _, oneResourceHints := range allResourcesHints {
    38  		var filtered []TopologyHint
    39  		for _, hint := range oneResourceHints {
    40  			if hint.NUMANodeAffinity == nil && hint.Preferred {
    41  				filtered = append(filtered, hint)
    42  			}
    43  			if hint.NUMANodeAffinity != nil && hint.NUMANodeAffinity.Count() == 1 && hint.Preferred {
    44  				filtered = append(filtered, hint)
    45  			}
    46  		}
    47  		filteredResourcesHints = append(filteredResourcesHints, filtered)
    48  	}
    49  	return filteredResourcesHints
    50  }
    51  
    52  func (policy *policySingleNumaNode) Predicate(providersHints []map[string][]TopologyHint) (TopologyHint, bool) {
    53  	filteredHints := filterProvidersHints(providersHints)
    54  	singleNumaHints := filterSingleNumaHints(filteredHints)
    55  	bestHint := mergeFilteredHints(policy.numaNodes, singleNumaHints)
    56  	klog.V(4).Infof("bestHint: %v\n", bestHint)
    57  	admit := policy.canAdmitPodResult(&bestHint)
    58  	return bestHint, admit
    59  }