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evict.go
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/
evict.go
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/*
Copyright 2022 Huawei Cloud Computing Technologies Co., Ltd.
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 immutable
import (
"container/list"
"strconv"
"sync"
"sync/atomic"
"time"
"github.com/influxdata/influxdb/pkg/limiter"
"github.com/openGemini/openGemini/lib/cpu"
"go.uber.org/zap"
)
type memReaderEvictCtx struct {
evictList []memReaderEvictList
evictListName []string
}
type memReaderEvictList struct {
mu sync.Mutex
list list.List
}
const (
PRELOAD = iota
LOAD
)
func NewMemReaderEvictCtx() *memReaderEvictCtx {
ctx := &memReaderEvictCtx{}
ctx.evictList = make([]memReaderEvictList, CompactLevels+1)
for i := range ctx.evictList {
ctx.evictList[i].list.Init()
}
ctx.evictListName = make([]string, CompactLevels+1)
for i := range ctx.evictList {
ctx.evictListName[i] = strconv.Itoa(i)
}
return ctx
}
func (ctx *memReaderEvictCtx) evictMemReader(evictSize int64) {
for i := len(ctx.evictList) - 1; i >= 0; i-- {
l := levelEvictListLock(uint16(i))
e := l.Back()
for e != nil {
f := e.Value.(TSSPFile)
e = e.Prev()
size := f.FreeMemory(false)
if size > 0 {
evictSize -= size
}
if evictSize <= 0 {
levelEvictListUnLock(uint16(i))
return
}
}
levelEvictListUnLock(uint16(i))
}
}
func getEvictListIdx(level uint16) uint16 {
listLen := uint16(len(nodeEvictCtx.evictList))
if level >= listLen {
level = listLen - 1
}
return level
}
func levelEvictListLock(level uint16) *list.List {
idx := getEvictListIdx(level)
nodeEvictCtx.evictList[idx].mu.Lock()
return &nodeEvictCtx.evictList[idx].list
}
func levelEvictList(level uint16) *list.List {
idx := getEvictListIdx(level)
return &nodeEvictCtx.evictList[idx].list
}
func levelEvictListUnLock(level uint16) {
idx := getEvictListIdx(level)
nodeEvictCtx.evictList[idx].mu.Unlock()
}
func levelName(level uint16) string {
idx := getEvictListIdx(level)
return nodeEvictCtx.evictListName[idx]
}
func getImmTableEvictSize() int64 {
nodeSize := atomic.LoadInt64(&nodeImmTableSizeUsed)
if nodeSize > nodeImmTableSizeLimit {
return nodeSize - nodeImmTableSizeLimit
}
return 0
}
var (
fileLoadLimiter limiter.Fixed
nodeEvictCtx *memReaderEvictCtx
nodeTableStoreGC TablesGC
)
func init() {
n := cpu.GetCpuNum() * 4
fileLoadLimiter = limiter.NewFixed(n)
nodeEvictCtx = NewMemReaderEvictCtx()
go nodeEvictCtx.runEvictMemReaders()
nodeTableStoreGC = NewTableStoreGC()
go nodeTableStoreGC.GC()
}
func UnrefFiles(files ...TSSPFile) {
for _, f := range files {
f.Unref()
}
}
var (
_ TablesStore = (*MmsTables)(nil)
)
type TablesGC interface {
Add(free bool, files ...TSSPFile)
GC()
}
type TableStoreGC struct {
mu sync.RWMutex
freeFiles map[string]TSSPFile
removeFiles map[string]TSSPFile
}
func NewTableStoreGC() TablesGC {
return &TableStoreGC{
freeFiles: make(map[string]TSSPFile, 8),
removeFiles: make(map[string]TSSPFile, 8),
}
}
func (sgc *TableStoreGC) Add(free bool, files ...TSSPFile) {
sgc.mu.Lock()
for _, f := range files {
fName := f.Path()
if free {
sgc.freeFiles[fName] = f
} else {
delete(sgc.freeFiles, fName)
sgc.removeFiles[f.Path()] = f
}
}
sgc.mu.Unlock()
}
func (sgc *TableStoreGC) GC() {
timer := time.NewTicker(time.Millisecond * 200)
for range timer.C {
sgc.mu.Lock()
if len(sgc.freeFiles) == 0 && len(sgc.removeFiles) == 0 {
sgc.mu.Unlock()
continue
}
for fn, f := range sgc.freeFiles {
if !f.Inuse() {
_ = f.FreeMemory(true)
delete(sgc.freeFiles, fn)
}
}
for fn, f := range sgc.removeFiles {
if !f.Inuse() {
err := f.Remove()
if err != nil {
log.Error("gc remove file fail", zap.String("file", fn), zap.Error(err))
} else {
log.Info("remove file", zap.String("file", fn))
delete(sgc.removeFiles, fn)
}
}
}
sgc.mu.Unlock()
}
timer.Stop()
}