package torrent
import (
+ "encoding/json"
+ "fmt"
"io"
- "sync"
+ "reflect"
+ "sync/atomic"
pp "github.com/anacrolix/torrent/peer_protocol"
)
+// Various connection-level metrics. At the Torrent level these are aggregates. Chunks are messages
+// with data payloads. Data is actual torrent content without any overhead. Useful is something we
+// needed locally. Unwanted is something we didn't ask for (but may still be useful). Written is
+// things sent to the peer, and Read is stuff received from them. Due to the implementation of
+// Count, must be aligned on some platforms: See https://github.com/anacrolix/torrent/issues/262.
type ConnStats struct {
- // Torrent "piece" messages, or data chunks.
- ChunksWritten int64 // Num piece messages sent.
- ChunksRead int64
// Total bytes on the wire. Includes handshakes and encryption.
- BytesWritten int64
- BytesRead int64
- // Data bytes, actual torrent data.
- DataBytesWritten int64
- DataBytesRead int64
+ BytesWritten Count
+ BytesWrittenData Count
+
+ BytesRead Count
+ BytesReadData Count
+ BytesReadUsefulData Count
+ BytesReadUsefulIntendedData Count
+
+ ChunksWritten Count
+
+ ChunksRead Count
+ ChunksReadUseful Count
+ ChunksReadWasted Count
+
+ MetadataChunksRead Count
+
+ // Number of pieces data was written to, that subsequently passed verification.
+ PiecesDirtiedGood Count
+ // Number of pieces data was written to, that subsequently failed verification. Note that a
+ // connection may not have been the sole dirtier of a piece.
+ PiecesDirtiedBad Count
}
-func (cs *ConnStats) wroteMsg(msg *pp.Message) {
- switch msg.Type {
- case pp.Piece:
- cs.ChunksWritten++
- cs.DataBytesWritten += int64(len(msg.Piece))
+func (me *ConnStats) Copy() (ret ConnStats) {
+ for i := 0; i < reflect.TypeOf(ConnStats{}).NumField(); i++ {
+ n := reflect.ValueOf(me).Elem().Field(i).Addr().Interface().(*Count).Int64()
+ reflect.ValueOf(&ret).Elem().Field(i).Addr().Interface().(*Count).Add(n)
}
+ return
+}
+
+type Count struct {
+ n int64
+}
+
+var _ fmt.Stringer = (*Count)(nil)
+
+func (me *Count) Add(n int64) {
+ atomic.AddInt64(&me.n, n)
+}
+
+func (me *Count) Int64() int64 {
+ return atomic.LoadInt64(&me.n)
+}
+
+func (me *Count) String() string {
+ return fmt.Sprintf("%v", me.Int64())
+}
+
+func (me *Count) MarshalJSON() ([]byte, error) {
+ return json.Marshal(me.n)
}
-func (cs *ConnStats) readMsg(msg *pp.Message) {
+func (cs *ConnStats) wroteMsg(msg *pp.Message) {
+ // TODO: Track messages and not just chunks.
switch msg.Type {
case pp.Piece:
- cs.ChunksRead++
- cs.DataBytesRead += int64(len(msg.Piece))
+ cs.ChunksWritten.Add(1)
+ cs.BytesWrittenData.Add(int64(len(msg.Piece)))
}
}
-func (cs *ConnStats) wroteBytes(n int64) {
- cs.BytesWritten += n
+func (cs *ConnStats) receivedChunk(size int64) {
+ cs.ChunksRead.Add(1)
+ cs.BytesReadData.Add(size)
+}
+
+func (cs *ConnStats) incrementPiecesDirtiedGood() {
+ cs.PiecesDirtiedGood.Add(1)
}
-func (cs *ConnStats) readBytes(n int64) {
- cs.BytesRead += n
+func (cs *ConnStats) incrementPiecesDirtiedBad() {
+ cs.PiecesDirtiedBad.Add(1)
+}
+
+func add(n int64, f func(*ConnStats) *Count) func(*ConnStats) {
+ return func(cs *ConnStats) {
+ p := f(cs)
+ p.Add(n)
+ }
}
type connStatsReadWriter struct {
rw io.ReadWriter
- l sync.Locker
- c *connection
+ c *PeerConn
}
func (me connStatsReadWriter) Write(b []byte) (n int, err error) {
n, err = me.rw.Write(b)
- me.l.Lock()
me.c.wroteBytes(int64(n))
- me.l.Unlock()
return
}
func (me connStatsReadWriter) Read(b []byte) (n int, err error) {
n, err = me.rw.Read(b)
- me.l.Lock()
me.c.readBytes(int64(n))
- me.l.Unlock()
return
}