forked from kubewharf/katalyst-core
/
pressure_load_metric.go
114 lines (91 loc) · 2.62 KB
/
pressure_load_metric.go
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/*
Copyright 2022 The Katalyst 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 strategy
import (
"sync"
advisorapi "github.com/kubewharf/katalyst-core/pkg/agent/qrm-plugins/cpu/dynamicpolicy/cpuadvisor"
"github.com/kubewharf/katalyst-core/pkg/config/agent/dynamic"
)
type MetricInfo struct {
Name string
Value float64
UpperBound float64
LowerBound float64
}
type MetricSnapshot struct {
Info MetricInfo
Time int64
}
type MetricRing struct {
MaxLen int
Queue []*MetricSnapshot
CurrentIndex int
sync.RWMutex
}
// SubEntries is keyed by container name or empty string (for pool)
type SubEntries map[string]*MetricRing
func (se SubEntries) IsPoolEntry() bool {
return len(se) == 1 && se[advisorapi.FakedContainerName] != nil
}
// Entries are keyed by pod UID or pool name
type Entries map[string]SubEntries
type PoolMetricCollectHandler func(dynamicConfig *dynamic.Configuration, poolsUnderPressure bool,
metricName string, metricValue float64, poolName string, poolSize int, collectTime int64)
func (ring *MetricRing) Sum() float64 {
ring.RLock()
defer ring.RUnlock()
sum := 0.0
for _, snapshot := range ring.Queue {
if snapshot != nil {
sum += snapshot.Info.Value
}
}
return sum
}
func (ring *MetricRing) Push(snapShot *MetricSnapshot) {
ring.Lock()
defer ring.Unlock()
if ring.CurrentIndex != -1 && snapShot != nil {
latestSnapShot := ring.Queue[ring.CurrentIndex]
if latestSnapShot != nil && latestSnapShot.Time == snapShot.Time {
return
}
}
ring.CurrentIndex = (ring.CurrentIndex + 1) % ring.MaxLen
ring.Queue[ring.CurrentIndex] = snapShot
}
func (ring *MetricRing) Count() (softOverCount, hardOverCount int) {
ring.RLock()
defer ring.RUnlock()
for _, snapshot := range ring.Queue {
if snapshot == nil {
continue
}
if snapshot.Info.LowerBound > 0 {
if snapshot.Info.Value > snapshot.Info.LowerBound {
softOverCount++
}
if snapshot.Info.Value > snapshot.Info.UpperBound {
hardOverCount++
}
}
}
return
}
func CreateMetricRing(size int) *MetricRing {
return &MetricRing{
MaxLen: size,
Queue: make([]*MetricSnapshot, size),
CurrentIndex: -1,
}
}