policy_restricted.go

Documentation: k8s.io/kubernetes/pkg/kubelet/cm/topologymanager

     1  /*
     2  Copyright 2019 The Kubernetes 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 topologymanager
    18  
    19  type restrictedPolicy struct {
    20  	bestEffortPolicy
    21  }
    22  
    23  var _ Policy = &restrictedPolicy{}
    24  
    25  // PolicyRestricted policy name.
    26  const PolicyRestricted string = "restricted"
    27  
    28  // NewRestrictedPolicy returns restricted policy.
    29  func NewRestrictedPolicy(numaInfo *NUMAInfo, opts PolicyOptions) Policy {
    30  	return &restrictedPolicy{bestEffortPolicy{numaInfo: numaInfo, opts: opts}}
    31  }
    32  
    33  func (p *restrictedPolicy) Name() string {
    34  	return PolicyRestricted
    35  }
    36  
    37  func (p *restrictedPolicy) canAdmitPodResult(hint *TopologyHint) bool {
    38  	return hint.Preferred
    39  }
    40  
    41  func (p *restrictedPolicy) Merge(providersHints []map[string][]TopologyHint) (TopologyHint, bool) {
    42  	filteredHints := filterProvidersHints(providersHints)
    43  	merger := NewHintMerger(p.numaInfo, filteredHints, p.Name(), p.opts)
    44  	bestHint := merger.Merge()
    45  	admit := p.canAdmitPodResult(&bestHint)
    46  	return bestHint, admit
    47  }
    48
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