Added in-memory CPU manager state.

pkg/kubelet/cm/cpumanager/state/state_mem.go

@@ -0,0 +1,90 @@
+/*
+Copyright 2017 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"
+
+	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/kubelet/cm/cpuset"
+)
+
+type stateMemory struct {
+	sync.RWMutex
+	assignments   map[string]cpuset.CPUSet
+	defaultCPUSet cpuset.CPUSet
+}
+
+var _ State = &stateMemory{}
+
+// NewMemoryState creates new State for keeping track of cpu/pod assignment
+func NewMemoryState() State {
+	glog.Infof("[cpumanager] initializing new in-memory state store")
+	return &stateMemory{
+		assignments:   map[string]cpuset.CPUSet{},
+		defaultCPUSet: cpuset.NewCPUSet(),
+	}
+}
+
+func (s *stateMemory) GetCPUSet(containerID string) (cpuset.CPUSet, bool) {
+	s.RLock()
+	defer s.RUnlock()
+
+	res, ok := s.assignments[containerID]
+	return res.Clone(), ok
+}
+
+func (s *stateMemory) GetDefaultCPUSet() cpuset.CPUSet {
+	s.RLock()
+	defer s.RUnlock()
+
+	return s.defaultCPUSet.Clone()
+}
+
+func (s *stateMemory) GetCPUSetOrDefault(containerID string) cpuset.CPUSet {
+	s.RLock()
+	defer s.RUnlock()
+
+	if res, ok := s.GetCPUSet(containerID); ok {
+		return res
+	}
+	return s.GetDefaultCPUSet()
+}
+
+func (s *stateMemory) SetCPUSet(containerID string, cset cpuset.CPUSet) {
+	s.Lock()
+	defer s.Unlock()
+
+	s.assignments[containerID] = cset
+	glog.Infof("[cpumanager] updated desired cpuset (container id: %s, cpuset: \"%s\")", containerID, cset)
+}
+
+func (s *stateMemory) SetDefaultCPUSet(cset cpuset.CPUSet) {
+	s.Lock()
+	defer s.Unlock()
+
+	s.defaultCPUSet = cset
+	glog.Infof("[cpumanager] updated default cpuset: \"%s\"", cset)
+}
+
+func (s *stateMemory) Delete(containerID string) {
+	s.Lock()
+	defer s.Unlock()
+
+	delete(s.assignments, containerID)
+	glog.V(2).Infof("[cpumanager] deleted cpuset assignment (container id: %s)", containerID)
+}