k8s.io/kubernetes@v1.29.3/pkg/kubelet/cm/cpumanager/state/state_mem.go (about)

     1  /*
     2  Copyright 2017 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 state
    18  
    19  import (
    20  	"sync"
    21  
    22  	"k8s.io/klog/v2"
    23  	"k8s.io/utils/cpuset"
    24  )
    25  
    26  type stateMemory struct {
    27  	sync.RWMutex
    28  	assignments   ContainerCPUAssignments
    29  	defaultCPUSet cpuset.CPUSet
    30  }
    31  
    32  var _ State = &stateMemory{}
    33  
    34  // NewMemoryState creates new State for keeping track of cpu/pod assignment
    35  func NewMemoryState() State {
    36  	klog.InfoS("Initialized new in-memory state store")
    37  	return &stateMemory{
    38  		assignments:   ContainerCPUAssignments{},
    39  		defaultCPUSet: cpuset.New(),
    40  	}
    41  }
    42  
    43  func (s *stateMemory) GetCPUSet(podUID string, containerName string) (cpuset.CPUSet, bool) {
    44  	s.RLock()
    45  	defer s.RUnlock()
    46  
    47  	res, ok := s.assignments[podUID][containerName]
    48  	return res.Clone(), ok
    49  }
    50  
    51  func (s *stateMemory) GetDefaultCPUSet() cpuset.CPUSet {
    52  	s.RLock()
    53  	defer s.RUnlock()
    54  
    55  	return s.defaultCPUSet.Clone()
    56  }
    57  
    58  func (s *stateMemory) GetCPUSetOrDefault(podUID string, containerName string) cpuset.CPUSet {
    59  	if res, ok := s.GetCPUSet(podUID, containerName); ok {
    60  		return res
    61  	}
    62  	return s.GetDefaultCPUSet()
    63  }
    64  
    65  func (s *stateMemory) GetCPUAssignments() ContainerCPUAssignments {
    66  	s.RLock()
    67  	defer s.RUnlock()
    68  	return s.assignments.Clone()
    69  }
    70  
    71  func (s *stateMemory) SetCPUSet(podUID string, containerName string, cset cpuset.CPUSet) {
    72  	s.Lock()
    73  	defer s.Unlock()
    74  
    75  	if _, ok := s.assignments[podUID]; !ok {
    76  		s.assignments[podUID] = make(map[string]cpuset.CPUSet)
    77  	}
    78  
    79  	s.assignments[podUID][containerName] = cset
    80  	klog.InfoS("Updated desired CPUSet", "podUID", podUID, "containerName", containerName, "cpuSet", cset)
    81  }
    82  
    83  func (s *stateMemory) SetDefaultCPUSet(cset cpuset.CPUSet) {
    84  	s.Lock()
    85  	defer s.Unlock()
    86  
    87  	s.defaultCPUSet = cset
    88  	klog.InfoS("Updated default CPUSet", "cpuSet", cset)
    89  }
    90  
    91  func (s *stateMemory) SetCPUAssignments(a ContainerCPUAssignments) {
    92  	s.Lock()
    93  	defer s.Unlock()
    94  
    95  	s.assignments = a.Clone()
    96  	klog.InfoS("Updated CPUSet assignments", "assignments", a)
    97  }
    98  
    99  func (s *stateMemory) Delete(podUID string, containerName string) {
   100  	s.Lock()
   101  	defer s.Unlock()
   102  
   103  	delete(s.assignments[podUID], containerName)
   104  	if len(s.assignments[podUID]) == 0 {
   105  		delete(s.assignments, podUID)
   106  	}
   107  	klog.V(2).InfoS("Deleted CPUSet assignment", "podUID", podUID, "containerName", containerName)
   108  }
   109  
   110  func (s *stateMemory) ClearState() {
   111  	s.Lock()
   112  	defer s.Unlock()
   113  
   114  	s.defaultCPUSet = cpuset.CPUSet{}
   115  	s.assignments = make(ContainerCPUAssignments)
   116  	klog.V(2).InfoS("Cleared state")
   117  }