/
memory_guard.go
139 lines (116 loc) · 4.86 KB
/
memory_guard.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 plugin
import (
"math"
"strconv"
"go.uber.org/atomic"
"github.com/kubewharf/katalyst-core/pkg/agent/qrm-plugins/memory/dynamicpolicy/memoryadvisor"
"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/metacache"
"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/plugin/qosaware/resource/helper"
"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/types"
"github.com/kubewharf/katalyst-core/pkg/config"
"github.com/kubewharf/katalyst-core/pkg/consts"
"github.com/kubewharf/katalyst-core/pkg/metaserver"
"github.com/kubewharf/katalyst-core/pkg/metrics"
"github.com/kubewharf/katalyst-core/pkg/util/general"
)
const (
MemoryGuard = "memory-guard"
reconcileStatusSucceeded = "succeeded"
reconcileStatusFailed = "failed"
reclaimMemoryUnlimited = -1
)
type memoryGuard struct {
metaReader metacache.MetaReader
metaServer *metaserver.MetaServer
emitter metrics.MetricEmitter
reclaimRelativeRootCgroupPath string
reclaimMemoryLimit *atomic.Int64
reconcileStatus *atomic.String
minCriticalWatermark int64
conf *config.Configuration
}
func NewMemoryGuard(conf *config.Configuration, extraConfig interface{}, metaReader metacache.MetaReader, metaServer *metaserver.MetaServer, emitter metrics.MetricEmitter) MemoryAdvisorPlugin {
return &memoryGuard{
metaReader: metaReader,
metaServer: metaServer,
emitter: emitter,
reclaimRelativeRootCgroupPath: conf.ReclaimRelativeRootCgroupPath,
reclaimMemoryLimit: atomic.NewInt64(-1),
reconcileStatus: atomic.NewString(reconcileStatusFailed),
minCriticalWatermark: conf.MinCriticalWatermark,
conf: conf,
}
}
func (mg *memoryGuard) Reconcile(status *types.MemoryPressureStatus) error {
dynamicConfig := mg.conf.GetDynamicConfiguration()
if !dynamicConfig.MemoryGuardConfiguration.Enable {
mg.reclaimMemoryLimit.Store(int64(reclaimMemoryUnlimited))
mg.reconcileStatus.Store(reconcileStatusSucceeded)
general.InfoS("memory guard is disabled")
return nil
}
mg.reconcileStatus.Store(reconcileStatusFailed)
reclaimMemoryLimit := .0
availNUMAs, _, err := helper.GetAvailableNUMAsAndReclaimedCores(mg.conf, mg.metaReader, mg.metaServer)
if err != nil {
return err
}
watermarkScaleFactor, err := mg.metaServer.GetNodeMetric(consts.MetricMemScaleFactorSystem)
if err != nil {
general.ErrorS(err, "Can not get system watermark scale factor")
return err
}
for _, numaID := range availNUMAs.ToSliceInt() {
reclaimedCoresUsed, err := mg.metaServer.GetCgroupNumaMetric(mg.reclaimRelativeRootCgroupPath, numaID, consts.MetricsMemTotalPerNumaCgroup)
if err != nil {
return err
}
numaTotal, err := mg.metaServer.GetNumaMetric(numaID, consts.MetricMemTotalNuma)
if err != nil {
return err
}
numaFree, err := mg.metaServer.GetNumaMetric(numaID, consts.MetricMemFreeNuma)
if err != nil {
return err
}
criticalWatermark := math.Max(float64(mg.minCriticalWatermark), numaTotal.Value*watermarkScaleFactor.Value/float64(10000))
reclaimMemoryLimit += reclaimedCoresUsed.Value +
math.Max(numaFree.Value-criticalWatermark, 0)
general.InfoS("NUMA memory info", "numaID", numaID,
"criticalWatermark", general.FormatMemoryQuantity(criticalWatermark),
"reclaimedCoresUsed", general.FormatMemoryQuantity(reclaimedCoresUsed.Value),
"numaTotal", general.FormatMemoryQuantity(numaTotal.Value),
"numaFree", general.FormatMemoryQuantity(numaFree.Value),
"reclaimMemoryLimit", general.FormatMemoryQuantity(reclaimMemoryLimit))
}
mg.reclaimMemoryLimit.Store(int64(reclaimMemoryLimit))
mg.reconcileStatus.Store(reconcileStatusSucceeded)
return nil
}
func (mg *memoryGuard) GetAdvices() types.InternalMemoryCalculationResult {
if mg.reconcileStatus.Load() == reconcileStatusFailed {
general.Errorf("failed to get last reconcile result")
return types.InternalMemoryCalculationResult{}
}
result := types.InternalMemoryCalculationResult{
ExtraEntries: []types.ExtraMemoryAdvices{
{
CgroupPath: mg.reclaimRelativeRootCgroupPath,
Values: map[string]string{string(memoryadvisor.ControlKnobKeyMemoryLimitInBytes): strconv.FormatInt(mg.reclaimMemoryLimit.Load(), 10)},
},
},
}
return result
}