- remove code for ancient systems
- better auto-scaling for slow networks
- bigger stats buffer (for many cores)

Reference: /n/atom/patch/applied2013/statsupd
Date: Wed Jun 19 01:02:51 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/stats.c	Wed Jun 19 01:02:10 2013
+++ /sys/src/cmd/stats.c	Wed Jun 19 01:02:10 2013
@@ -49,8 +49,8 @@
 	In		= 0,
 	Link,
 	Out,
-	Err0,
 	Crcerr,
+	Ovf,
 	Sovf,
 	Frerr,
 	Buferr,
@@ -58,6 +58,9 @@
 	Prom,
 	Mbps,
 	Addr,
+
+	Err0		= Crcerr,
+	Errlast		= Oerr,
 };
 
 struct Machine
@@ -229,7 +232,6 @@
 double	scale = 1.0;
 int	logscale = 0;
 int	ylabels = 0;
-int	oldsystem = 0;
 uint 	sleeptime = 1000;
 uint 	prescale = 1;
 
@@ -367,8 +369,7 @@
 datapoint(Graph *g, int x, uvlong v, uvlong vmax)
 {
 	Point p;
-	ulong u;
-	double y;
+	double u, y;
 
 	p.x = x;
 	y = ((double)v)/(vmax*scale);
@@ -386,15 +387,12 @@
 			y = (y+2.)/3.;
 		}
 	}
-	u = Dy(g->r);
-	u *= y;
-	u = g->r.max.y - u - Dot;
-//	u = g->r.max.y - Dy(g->r)*y - Dot;
+	u = g->r.max.y - Dy(g->r)*y - Dot;
+	if(u < (double)g->r.min.y)
+		u = g->r.min.y;
+	if(u > (double)g->r.max.y-Dot)
+		u = g->r.max.y-Dot;
 	p.y = u;
-	if(p.y < g->r.min.y)
-		p.y = g->r.min.y;
-	if(p.y > g->r.max.y-Dot)
-		p.y = g->r.max.y-Dot;
 	return p;
 }
 
@@ -489,97 +487,6 @@
 	return i == n;
 }
 
-/* Network on fd1, mount driver on fd0 */
-static int
-filter(int fd)
-{
-	int p[2];
-
-	if(pipe(p) < 0){
-		fprint(2, "stats: can't pipe: %r\n");
-		killall("pipe");
-	}
-
-	switch(rfork(RFNOWAIT|RFPROC|RFFDG)) {
-	case -1:
-		sysfatal("rfork record module");
-	case 0:
-		dup(fd, 1);
-		close(fd);
-		dup(p[0], 0);
-		close(p[0]);
-		close(p[1]);
-		execl("/bin/aux/fcall", "fcall", nil);
-		fprint(2, "stats: can't exec fcall: %r\n");
-		killall("fcall");
-	default:
-		close(fd);
-		close(p[0]);
-	}
-	return p[1];
-}
-
-/*
- * 9fs
- */
-int
-connect9fs(char *addr)
-{
-	char dir[256], *na;
-	int fd;
-
-	fprint(2, "connect9fs...");
-	na = netmkaddr(addr, 0, "9fs");
-
-	fprint(2, "dial %s...", na);
-	if((fd = dial(na, 0, dir, 0)) < 0)
-		return -1;
-
-	fprint(2, "dir %s...", dir);
-//	if(strstr(dir, "tcp"))
-//		fd = filter(fd);
-	return fd;
-}
-
-int
-old9p(int fd)
-{
-	int p[2];
-
-	if(pipe(p) < 0)
-		return -1;
-
-	switch(rfork(RFPROC|RFFDG|RFNAMEG)) {
-	case -1:
-		return -1;
-	case 0:
-		if(fd != 1){
-			dup(fd, 1);
-			close(fd);
-		}
-		if(p[0] != 0){
-			dup(p[0], 0);
-			close(p[0]);
-		}
-		close(p[1]);
-		if(0){
-			fd = open("/sys/log/cpu", OWRITE);
-			if(fd != 2){
-				dup(fd, 2);
-				close(fd);
-			}
-			execl("/bin/srvold9p", "srvold9p", "-ds", nil);
-		} else
-			execl("/bin/srvold9p", "srvold9p", "-s", nil);
-		return -1;
-	default:
-		close(fd);
-		close(p[0]);
-	}
-	return p[1];
-}
-
-
 /*
  * exportfs
  */
@@ -615,29 +522,20 @@
 		return -1;
 	}
 
-//	if(strstr(dir, "tcp"))
-//		fd = filter(fd);
-
-	if(oldsystem)
-		return old9p(fd);
-
 	return fd;
 }
 
 int
 readswap(Machine *m, uvlong *a)
 {
-	if(strstr(m->buf, "memory\n")){
-		/* new /dev/swap - skip first 3 numbers */
-		if(!readnums(m, 7, a, 1))
-			return 0;
-		a[0] = a[3];
-		a[1] = a[4];
-		a[2] = a[5];
-		a[3] = a[6];
-		return 1;
-	}
-	return readnums(m, nelem(m->devswap), a, 0);
+	/* new /dev/swap - skip first 3 numbers */
+	if(!readnums(m, 7, a, 1))
+		return 0;
+	a[0] = a[3];
+	a[1] = a[4];
+	a[2] = a[5];
+	a[3] = a[6];
+	return 1;
 }
 
 char*
@@ -1008,7 +906,7 @@
 	int i;
 
 	*v = 0;
-	for(i=Err0; i<nelem(m->netetherstats); i++)
+	for(i=Err0; i<Errlast; i++)
 		*v += m->netetherstats[i];
 	i = sleeptime/100;
 	if(i == 0)
@@ -1045,7 +943,7 @@
 	int i;
 
 	*v = 0;
-	for(i=Err0; i<nelem(m->netether1stats); i++)
+	for(i=Err0; i<Errlast; i++)
 		*v += m->netether1stats[i];
 	i = sleeptime/100;
 	if(i == 0)
@@ -1421,9 +1319,6 @@
 		break;
 	case 'Y':
 		ylabels++;
-		break;
-	case 'O':
-		oldsystem = 1;
 		break;
 	default:
 		if(nargs>=sizeof args || strchr(argchars, ARGC())==nil)