.

go/neo/connection.go

@@ -65,8 +65,8 @@ type NodeLink struct {
 
 	serveWg sync.WaitGroup	// for serve{Send,Recv}
 	acceptq chan *Conn	// queue of incoming connections for Accept
-	txq	chan txReq	// tx requests from Conns go via here
-				// (rx packets are routed to Conn.rxq)
+//	txq	chan txReq	// tx requests from Conns go via here
+//				// (rx packets are routed to Conn.rxq)
 
 	axdown  chan struct{}	// ready when accept is marked as no longer operational
 	axdown1 sync.Once	// CloseAccept may be called severall times
@@ -95,16 +95,16 @@ type Conn struct {
 	link      *NodeLink
 	connId    uint32
 	rxq	  chan *PktBuf	// received packets for this Conn go here
-	txerr     chan error	// transmit results for this Conn go back here
+//	txerr     chan error	// transmit results for this Conn go back here
 
-	txdown     chan struct{} // ready when Conn TX is marked as no longer operational
+//	txdown     chan struct{} // ready when Conn TX is marked as no longer operational
 	rxdown     chan struct{} // ----//---- RX
-	txdownOnce sync.Once	 // tx shutdown may be called by both Close and nodelink.shutdown
+//	txdownOnce sync.Once	 // tx shutdown may be called by both Close and nodelink.shutdown
 	rxdownOnce sync.Once	 // ----//----
 
 	rxerrOnce sync.Once     // rx error is reported only once - then it is link down or closed
 	rxclosed  int32		// whether CloseRecv was called
-	txclosed  int32		// whether CloseSend was called
+//	txclosed  int32		// whether CloseSend was called
 
 	errMsg	  *Error	// error message for peer if rx is down
 
@@ -176,7 +176,7 @@ func newNodeLink(conn net.Conn, role LinkRole) *NodeLink {
 		connTab:    map[uint32]*Conn{},
 		nextConnId: nextConnId,
 		acceptq:    make(chan *Conn),	// XXX +buf
-		txq:        make(chan txReq),
+		//txq:        make(chan txReq),
 		axdown:     make(chan struct{}),
 		down:       make(chan struct{}),
 	}
@@ -195,8 +195,8 @@ func (nl *NodeLink) newConn(connId uint32) *Conn {
 	c := &Conn{link: nl,
 		connId: connId,
 		rxq:    make(chan *PktBuf, 1),	// NOTE non-blocking - see serveRecv XXX +buf
-		txerr:  make(chan error, 1),	// NOTE non-blocking - see Conn.Send
-		txdown: make(chan struct{}),
+		//txerr:  make(chan error, 1),	// NOTE non-blocking - see Conn.Send
+		//txdown: make(chan struct{}),
 		rxdown: make(chan struct{}),
 	}
 	nl.connTab[connId] = c
@@ -328,9 +328,9 @@ func (c *Conn) shutdown() {
 }
 
 func (c *Conn) shutdownTX() {
-	c.txdownOnce.Do(func() {
-		close(c.txdown)
-	})
+	//c.txdownOnce.Do(func() {
+	//	close(c.txdown)
+	//})
 }
 
 // shutdownRX marks .rxq as no loner operational
@@ -389,7 +389,7 @@ func (c *Conn) Close() error {
 	nl := c.link
 	c.closeOnce.Do(func() {
 		atomic.StoreInt32(&c.rxclosed, 1)
-		atomic.StoreInt32(&c.txclosed, 1)
+		//atomic.StoreInt32(&c.txclosed, 1)
 		c.shutdown()
 
 		// adjust link.connTab
@@ -655,6 +655,7 @@ type txReq struct {
 	errch chan error
 }
 
+/*
 // errSendShutdown returns appropriate error when c.txdown is found ready in Send
 func (c *Conn) errSendShutdown() error {
 	switch {
@@ -672,6 +673,7 @@ func (c *Conn) errSendShutdown() error {
 		return ErrLinkDown
 	}
 }
+*/
 
 // sendPkt sends raw packet via connection.
 //
@@ -686,6 +688,7 @@ func (c *Conn) sendPkt(pkt *PktBuf) error {
 // https://github.com/golang/go/blob/go1.9-3-g099336988b/src/net/net.go#L109
 // https://github.com/golang/go/blob/go1.9-3-g099336988b/src/internal/poll/fd_unix.go#L14
 
+///*
 func (c *Conn) sendPkt2(pkt *PktBuf) error {
 	// set pkt connId associated with this connection
 	pkt.Header().ConnId = hton32(c.connId)
@@ -702,6 +705,7 @@ func (c *Conn) sendPkt2(pkt *PktBuf) error {
 
 	return err
 }
+//*/
 
 /*
 func (c *Conn) sendPkt2(pkt *PktBuf) error {
@@ -1216,7 +1220,8 @@ func (c *Conn) Recv() (Msg, error) {
 	return msg, nil
 }
 
-// Send sends message
+// Send sends message.
+//
 // it encodes message into packet and sends it
 func (c *Conn) Send(msg Msg) error {
 	traceConnSendPre(c, msg)

go/neo/t/.gitignore

 /log
 /var
+/zsha1

go/neo/t/t.sh

@@ -77,7 +77,7 @@ Sgo() {
 	# -cpuprofile cpu.out
 	# -trace trace.out
 	exec -a Sgo \
-		neo -log_dir=$log storage -cluster=$cluster -bind=$Sbind -masters=$Mbind "$@" &
+		neo -trace trace.out -log_dir=$log storage -cluster=$cluster -bind=$Sbind -masters=$Mbind "$@" &
 }
 
 

go/neo/t/zsha1.go

@@ -8,6 +8,9 @@ import (
 	"crypto/sha1"
 	"flag"
 	"fmt"
+	"hash"
+	"hash/crc32"
+	"hash/adler32"
 	//"os"
 	"time"
 
@@ -100,12 +103,25 @@ func zsha1(ctx context.Context, url string, useprefetch bool) (err error) {
 	}
 	before := lastTid + 1	// XXX overflow ?
 
-	if false {
-		defer profile.Start(profile.TraceProfile).Stop()
+	if true {
+		//defer profile.Start(profile.TraceProfile).Stop()
+		defer profile.Start().Stop()
 	}
 
+for qqq := 0; qqq < 10; qqq++ {
 	tstart := time.Now()
-	m := sha1.New()
+	var m hash.Hash
+	hashName := "crc32"
+	switch hashName {
+	case "sha1":
+		m = sha1.New()
+	case "crc32":
+		m = crc32.NewIEEE()
+	case "adler32":
+		m = adler32.New()
+	default:
+		panic(0)	// XXX
+	}
 
 	oid := zodb.Oid(0)
 	nread := 0
@@ -142,8 +158,9 @@ loop:
 	if useprefetch {
 		x += " +prefetch"
 	}
-	fmt.Printf("%x   ; oid=0..%d  nread=%d  t=%s (%s / object)  x=%s\n",
-		m.Sum(nil), oid-1, nread, δt, δt / time.Duration(oid), x) // XXX /oid cast ?
+	fmt.Printf("%s:%x   ; oid=0..%d  nread=%d  t=%s (%s / object)  x=%s\n",
+		hashName,m.Sum(nil), oid-1, nread, δt, δt / time.Duration(oid), x) // XXX /oid cast ?
+}
 
 	return nil
 }

go/neo/t/zsha1.py

@@ -9,9 +9,38 @@ from ZODB.POSException import POSKeyError
 from ZODB.utils import p64, u64
 
 import hashlib
+from zlib import crc32, adler32
 import sys
 from time import time
 
+# crc32 in hashlib interface
+class CRC32Hasher:
+
+    name = "crc32"
+
+    def __init__(self):
+        self.h = crc32('')
+
+    def update(self, data):
+        self.h = crc32(data, self.h)
+
+    def hexdigest(self):
+        return '%x' % (self.h & 0xffffffff)
+
+# adler32 in hashlib interface
+class Adler32Hasher:
+
+    name = "adler32"
+
+    def __init__(self):
+        self.h = adler32('')
+
+    def update(self, data):
+        self.h = adler32(data, self.h)
+
+    def hexdigest(self):
+        return '%x' % (self.h & 0xffffffff)
+
 def main():
     url = sys.argv[1]
 
@@ -19,8 +48,12 @@ def main():
     last_tid = stor.lastTransaction()
     before = p64(u64(last_tid) + 1)
 
+    for zzz in range(10):
+        #m = hashlib.sha1()
+        m = CRC32Hasher()
+        #m = Adler32Hasher()
+
         tstart = time()
-    m = hashlib.sha1()
 
         oid = 0
         nread = 0
@@ -41,8 +74,8 @@ def main():
         tend = time()
         dt = tend - tstart
 
-    print('%s   ; oid=0..%d  nread=%d  t=%.3fs (%.1fμs / object)  x=zsha1.py' % \
-            (m.hexdigest(), oid-1, nread, dt, dt * 1E6 / oid))
+        print('%s:%s   ; oid=0..%d  nread=%d  t=%.3fs (%.1fμs / object)  x=zsha1.py' % \
+                (m.name, m.hexdigest(), oid-1, nread, dt, dt * 1E6 / oid))
 
 
 if __name__ == '__main__':