Hi,
the following patch adds a new flag to iostat(8) to show the read and
write transfers per second, similiar to the iostat view of systat(1).
Though I had a hard time formulating the man page bits. This is how it
looks like:
$ iostat -x -w1 wd0
wd0
KB/t rt/s wt/s MB/s
19.00 135 2021 39.99
21.84 155 978 24.18
22.57 62 346 8.99
Or for multiple disks:
$ iostat -x -w 1
wd0 sd0 sd1
KB/t rt/s wt/s MB/s KB/t rt/s wt/s MB/s KB/t rt/s wt/s MB/s
19.62 1 5 0.12 32.10 0 0 0.01 0.50 0 0 0.00
0.00 0 0 0.00 0.00 0 0 0.00 0.00 0 0 0.00
Together w/ CPU stats:
$ iostat -Cx -w 1 wd0
wd0 cpu
KB/t rt/s wt/s MB/s us ni sy in id
19.61 1 5 0.12 7 0 4 0 89
0.00 0 0 0.00 0 0 3 0 97
0.00 0 0 0.00 0 0 3 0 97
Frank.
Index: iostat.c
===================================================================
RCS file: /cvs/src/usr.sbin/iostat/iostat.c,v
retrieving revision 1.28
diff -u -r1.28 iostat.c
--- iostat.c 26 Jun 2012 21:37:59 -0000 1.28
+++ iostat.c 10 Sep 2012 20:33:27 -0000
@@ -94,6 +94,7 @@
#define SHOW_TTY 0x0002
#define SHOW_STATS_1 0x0004
#define SHOW_STATS_2 0x0008
+#define SHOW_STATS_3 0x0010
#define SHOW_TOTALS 0x0080
static void cpustats(void);
@@ -115,7 +116,7 @@
int ch, hdrcnt;
struct timeval tv;
- while ((ch = getopt(argc, argv, "Cc:dDIM:N:Tw:")) != -1)
+ while ((ch = getopt(argc, argv, "Cc:dDIM:N:Tw:x")) != -1)
switch(ch) {
case 'c':
if ((reps = atoi(optarg)) <= 0)
@@ -146,6 +147,9 @@
if ((interval = atoi(optarg)) <= 0)
errx(1, "interval <= 0.");
break;
+ case 'x':
+ todo |= SHOW_STATS_3;
+ break;
case '?':
default:
usage();
@@ -153,7 +157,7 @@
argc -= optind;
argv += optind;
- if (!ISSET(todo, SHOW_CPU | SHOW_TTY | SHOW_STATS_1 | SHOW_STATS_2))
+ if (!ISSET(todo, SHOW_CPU | SHOW_TTY | SHOW_STATS_1 | SHOW_STATS_2 |
SHOW_STATS_3))
todo |= SHOW_CPU | SHOW_TTY | SHOW_STATS_1;
dkinit(0);
@@ -210,13 +214,18 @@
if (ISSET(todo, SHOW_STATS_1))
for (i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i])
- (void)printf(" %14.14s ", cur.dk_name[i]);
+ (void)printf(" %16.16s ", cur.dk_name[i]);
if (ISSET(todo, SHOW_STATS_2))
for (i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i])
(void)printf(" %13.13s ", cur.dk_name[i]);
+ if (ISSET(todo, SHOW_STATS_3))
+ for (i = 0; i < dk_ndrive; i++)
+ if (cur.dk_select[i])
+ (void)printf(" %21.21s ", cur.dk_name[i]);
+
if (ISSET(todo, SHOW_CPU))
(void)printf(" cpu");
printf("\n");
@@ -238,6 +247,11 @@
if (cur.dk_select[i]) {
(void)printf(" KB xfr time ");
}
+ if (ISSET(todo, SHOW_STATS_3))
+ for (i = 0; i < dk_ndrive; i++)
+ if (cur.dk_select[i]) {
+ (void)printf(" KB/t rt/s wt/s MB/s ");
+ }
if (ISSET(todo, SHOW_CPU))
(void)printf(" us ni sy in id");
printf("\n");
@@ -306,6 +320,43 @@
}
static void
+disk_stats3(double etime)
+{
+ int dn;
+ double atime, mbps;
+
+ for (dn = 0; dn < dk_ndrive; ++dn) {
+ if (!cur.dk_select[dn])
+ continue;
+
+ /* average Kbytes per transfer. */
+ if (cur.dk_rxfer[dn] + cur.dk_wxfer[dn])
+ mbps = ((cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) /
+ (1024.0)) / (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]);
+ else
+ mbps = 0.0;
+
+ (void)printf(" %5.2f", mbps);
+
+ /* average transfers per second. */
+ (void)printf(" %4.0f", cur.dk_rxfer[dn] / etime);
+ (void)printf(" %4.0f", cur.dk_wxfer[dn] / etime);
+
+ /* time busy in disk activity */
+ atime = (double)cur.dk_time[dn].tv_sec +
+ ((double)cur.dk_time[dn].tv_usec / (double)1000000);
+
+ /* Megabytes per second. */
+ if (atime != 0.0)
+ mbps = (cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) /
+ (double)(1024 * 1024);
+ else
+ mbps = 0;
+ (void)printf(" %5.2f ", mbps / etime);
+ }
+}
+
+static void
cpustats(void)
{
int state;
@@ -324,7 +375,7 @@
usage(void)
{
(void)fprintf(stderr,
-"usage: iostat [-CDdIT] [-c count] [-M core] [-N system] [-w wait]
[drives]\n");
+"usage: iostat [-CDdITx] [-c count] [-M core] [-N system] [-w wait]
[drives]\n");
exit(1);
}
@@ -358,6 +409,9 @@
if (ISSET(todo, SHOW_STATS_2))
disk_stats2(etime);
+
+ if (ISSET(todo, SHOW_STATS_3))
+ disk_stats3(etime);
if (ISSET(todo, SHOW_CPU))
cpustats();
Index: iostat.8
===================================================================
RCS file: /cvs/src/usr.sbin/iostat/iostat.8,v
retrieving revision 1.25
diff -u -r1.25 iostat.8
--- iostat.8 10 Feb 2011 14:52:35 -0000 1.25
+++ iostat.8 10 Sep 2012 20:33:27 -0000
@@ -38,7 +38,7 @@
.Nd report I/O statistics
.Sh SYNOPSIS
.Nm iostat
-.Op Fl CDdIT
+.Op Fl CDdITx
.Op Fl c Ar count
.Op Fl M Ar core
.Op Fl N Ar system
@@ -119,6 +119,11 @@
option,
.Nm
will display output until it is interrupted.
+.It Fl x
+Similiar to
+.Fl d
+but shows the number of read and write transfers per second instead of
+the sum of all transfers per second.
.El
.Pp
.Nm
@@ -149,6 +154,19 @@
Transfers per second
.It MB/s
Megabytes transferred per second
+.Pp
+.El
+The extended disk statistics (selected with
+.Fl x ) ,
+displays the same values as above but splits up
+.Em t/s
+into two values, namely:
+.Pp
+.Bl -tag -width indent -compact
+.It rt/s
+Read transfers per second
+.It wt/s
+Write transfers per second
.Pp
.El
The alternate display format, (selected with
--
Frank Brodbeck <[email protected]>
