/* Copyright 2020 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package state import ( "sync" "k8s.io/klog/v2" ) type stateMemory struct { sync.RWMutex assignments ContainerMemoryAssignments machineState NUMANodeMap } var _ State = &stateMemory{} // NewMemoryState creates new State for keeping track of cpu/pod assignment func NewMemoryState() State { klog.InfoS("Initializing new in-memory state store") return &stateMemory{ assignments: ContainerMemoryAssignments{}, machineState: NUMANodeMap{}, } } // GetMemoryState returns Memory Map stored in the State func (s *stateMemory) GetMachineState() NUMANodeMap { s.RLock() defer s.RUnlock() return s.machineState.Clone() } // GetMemoryBlocks returns memory assignments of a container func (s *stateMemory) GetMemoryBlocks(podUID string, containerName string) []Block { s.RLock() defer s.RUnlock() if res, ok := s.assignments[podUID][containerName]; ok { return append([]Block{}, res...) } return nil } // GetMemoryAssignments returns ContainerMemoryAssignments func (s *stateMemory) GetMemoryAssignments() ContainerMemoryAssignments { s.RLock() defer s.RUnlock() return s.assignments.Clone() } // SetMachineState stores NUMANodeMap in State func (s *stateMemory) SetMachineState(nodeMap NUMANodeMap) { s.Lock() defer s.Unlock() s.machineState = nodeMap.Clone() klog.InfoS("Updated machine memory state") } // SetMemoryBlocks stores memory assignments of container func (s *stateMemory) SetMemoryBlocks(podUID string, containerName string, blocks []Block) { s.Lock() defer s.Unlock() if _, ok := s.assignments[podUID]; !ok { s.assignments[podUID] = map[string][]Block{} } s.assignments[podUID][containerName] = append([]Block{}, blocks...) klog.InfoS("Updated memory state", "podUID", podUID, "containerName", containerName) } // SetMemoryAssignments sets ContainerMemoryAssignments by using the passed parameter func (s *stateMemory) SetMemoryAssignments(assignments ContainerMemoryAssignments) { s.Lock() defer s.Unlock() s.assignments = assignments.Clone() } // Delete deletes corresponding Blocks from ContainerMemoryAssignments func (s *stateMemory) Delete(podUID string, containerName string) { s.Lock() defer s.Unlock() if _, ok := s.assignments[podUID]; !ok { return } delete(s.assignments[podUID], containerName) if len(s.assignments[podUID]) == 0 { delete(s.assignments, podUID) } klog.V(2).InfoS("Deleted memory assignment", "podUID", podUID, "containerName", containerName) } // ClearState clears machineState and ContainerMemoryAssignments func (s *stateMemory) ClearState() { s.Lock() defer s.Unlock() s.machineState = NUMANodeMap{} s.assignments = make(ContainerMemoryAssignments) klog.V(2).InfoS("Cleared state") }