package restic import ( "crypto/sha256" "sync" "github.com/restic/restic/chunker" "github.com/restic/restic/crypto" "github.com/restic/restic/debug" ) type poolStats struct { m sync.Mutex mget map[string]int mput map[string]int mmax map[string]int new int get int put int max int } const maxCiphertextSize = crypto.Extension + chunker.MaxSize func (s *poolStats) Get(k string) { s.m.Lock() defer s.m.Unlock() s.get++ cur := s.get - s.put if cur > s.max { s.max = cur } if k != "" { if _, ok := s.mget[k]; !ok { s.mget[k] = 0 s.mput[k] = 0 s.mmax[k] = 0 } s.mget[k]++ cur = s.mget[k] - s.mput[k] if cur > s.mmax[k] { s.mmax[k] = cur } } } func (s *poolStats) Put(k string) { s.m.Lock() defer s.m.Unlock() s.put++ if k != "" { s.mput[k]++ } } func newPoolStats() *poolStats { return &poolStats{ mget: make(map[string]int), mput: make(map[string]int), mmax: make(map[string]int), } } var ( chunkPool = sync.Pool{New: newChunkBuf} chunkerPool = sync.Pool{New: newChunker} chunkStats = newPoolStats() nodeStats = newPoolStats() chunkerStats = newPoolStats() ) func newChunkBuf() interface{} { chunkStats.m.Lock() defer chunkStats.m.Unlock() chunkStats.new++ // create buffer for iv, data and mac return make([]byte, maxCiphertextSize) } func newChunker() interface{} { chunkStats.m.Lock() defer chunkStats.m.Unlock() chunkStats.new++ // create a new chunker with a nil reader and null polynomial return chunker.New(nil, 0, chunkerBufSize, sha256.New()) } func GetChunkBuf(s string) []byte { chunkStats.Get(s) return chunkPool.Get().([]byte) } func FreeChunkBuf(s string, buf []byte) { chunkStats.Put(s) chunkPool.Put(buf) } func GetChunker(s string) *chunker.Chunker { chunkerStats.Get(s) return chunkerPool.Get().(*chunker.Chunker) } func FreeChunker(s string, ch *chunker.Chunker) { chunkerStats.Put(s) chunkerPool.Put(ch) } func PoolAlloc() { debug.Log("pools.PoolAlloc", "pool stats for chunk: new %d, get %d, put %d, diff %d, max %d\n", chunkStats.new, chunkStats.get, chunkStats.put, chunkStats.get-chunkStats.put, chunkStats.max) for k, v := range chunkStats.mget { debug.Log("pools.PoolAlloc", "pool stats for chunk[%s]: get %d, put %d, diff %d, max %d\n", k, v, chunkStats.mput[k], v-chunkStats.mput[k], chunkStats.mmax[k]) } debug.Log("pools.PoolAlloc", "pool stats for node: new %d, get %d, put %d, diff %d, max %d\n", nodeStats.new, nodeStats.get, nodeStats.put, nodeStats.get-nodeStats.put, nodeStats.max) for k, v := range nodeStats.mget { debug.Log("pools.PoolAlloc", "pool stats for node[%s]: get %d, put %d, diff %d, max %d\n", k, v, nodeStats.mput[k], v-nodeStats.mput[k], nodeStats.mmax[k]) } debug.Log("pools.PoolAlloc", "pool stats for chunker: new %d, get %d, put %d, diff %d, max %d\n", chunkerStats.new, chunkerStats.get, chunkerStats.put, chunkerStats.get-chunkerStats.put, chunkerStats.max) for k, v := range chunkerStats.mget { debug.Log("pools.PoolAlloc", "pool stats for chunker[%s]: get %d, put %d, diff %d, max %d\n", k, v, chunkerStats.mput[k], v-chunkerStats.mput[k], chunkerStats.mmax[k]) } }