Date: Sat, 17 Aug 1996 08:16:51 -0700 (PDT) From: Matthew Dillon <dillon@backplane.com> To: FreeBSD-gnats-submit@freebsd.org Subject: bin/1502: vmstat 'avm' field merges with procs 'w' field for large avm Message-ID: <199608171516.IAA00706@apollo.backplane.com> Resent-Message-ID: <199608171520.IAA00343@freefall.freebsd.org>
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>Number: 1502
>Category: bin
>Synopsis: vmstat 'avm' field merges with procs 'w' field for large avm
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Aug 17 08:20:01 PDT 1996
>Last-Modified:
>Originator: Matthew Dillon
>Organization:
BEST Internet Communications
>Release: FreeBSD 2.1-STABLE i386
>Environment:
running 2.1.5 patched to (ctm) src-2.1.0.0154.gz
Pentium 90
32 MB ram
>Description:
Here is some typical vmstat output:
apollo:/home/dillon> vmstat 5
procs memory page disks faults cpu
r b w avm fre flt re pi po fr sr s0 s1 f0 in sy cs us sy id
0 0 0132236 7780 604 0 11 0 461 0 26 9 0 302 1090 101 14 18 68
0 0 0127968 7780 3 0 0 0 2 0 0 0 0 301 124 25 0 1 99
^^
note this .. the '0' from the proc-wait field is merged with the
'127968' from the avm field.
Note the fact that the avm value merges with the number of waiting
processes. This makes it difficult to be able to 'glance' at a
running vmstat.
>How-To-Repeat:
>Fix:
I suggest either adding a space in front of the avm field, or changing
the field to report megabytes (i.e. 45.5) rather then kilobytes. Just
about every system you run vmstat on overflows the current field.
It would also be nice if vmstat had a switch to replace the avm field
with the active-real-memory (arm) field.
I submit below sample output that makes two changes to vmstat.
(1) vmstat reports avm/arm and fre in megabytes and
(2) I added the -r option to make it report active real memory rather
then active virtual memory. Active real memory is a more useful
indicator.
apollo:/src/apollo/usr.bin/vmstat# vmstat -r 5
procs memory page disks faults cpu
r b w arm fre flt re pi po fr sr s0 s1 f0 in sy cs us sy id
0 0 0 5.5 4.4 40 0 0 0 32 1 2 0 0 303 172 37 2 2 96
0 0 0 5.2 4.4 1 0 0 0 0 0 0 0 0 298 41 7 0 1 99
0 0 0 6.7 4.4 1 0 0 1 0 0 9 4 0 307 335 55 2 2 95
*** /usr/src/usr.bin/vmstat/vmstat.c Sat Aug 17 06:55:20 1996
--- vmstat.c Sat Aug 17 08:09:23 1996
***************
*** 167,172 ****
--- 167,175 ----
void dotimes(), doforkst();
#endif
+ int ReportARM;
+ const char *AxmName = "avm";
+
main(argc, argv)
register int argc;
register char **argv;
***************
*** 181,188 ****
memf = nlistf = NULL;
interval = reps = todo = 0;
! while ((c = getopt(argc, argv, "c:fiM:mN:stw:")) != EOF) {
switch (c) {
case 'c':
reps = atoi(optarg);
break;
--- 184,195 ----
memf = nlistf = NULL;
interval = reps = todo = 0;
! while ((c = getopt(argc, argv, "c:rfiM:mN:stw:")) != EOF) {
switch (c) {
+ case 'r':
+ ReportARM = 1;
+ AxmName = "arm";
+ break;
case 'c':
reps = atoi(optarg);
break;
***************
*** 423,430 ****
total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
#define pgtok(a) ((a) * sum.v_page_size >> 10)
#define rate(x) (((x) + halfuptime) / uptime) /* round */
! (void)printf("%6ld%6ld ",
! pgtok(total.t_avm), pgtok(total.t_free));
(void)printf("%4lu ", rate(sum.v_vm_faults - osum.v_vm_faults));
(void)printf("%3lu ",
rate(sum.v_reactivated - osum.v_reactivated));
--- 430,448 ----
total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
#define pgtok(a) ((a) * sum.v_page_size >> 10)
#define rate(x) (((x) + halfuptime) / uptime) /* round */
! {
! int tf = sum.v_page_size / 1024 * total.t_free * 10 / 1024;
! int arm = sum.v_page_size / 1024 * total.t_arm * 10 / 1024;
! int avm = sum.v_page_size / 1024 * total.t_avm * 10 / 1024;
! int axm = (ReportARM) ? arm : avm;
!
! (void)printf(" %3d.%d %3d.%d ",
! axm / 10,
! axm % 10,
! tf / 10,
! tf % 10
! );
! }
(void)printf("%4lu ", rate(sum.v_vm_faults - osum.v_vm_faults));
(void)printf("%3lu ",
rate(sum.v_reactivated - osum.v_reactivated));
***************
*** 468,474 ****
ndrives * 3 - 6, "");
else
(void)printf("%*s faults cpu\n", ndrives * 3, "");
! (void)printf(" r b w avm fre flt re pi po fr sr ");
for (i = 0; i < dk_ndrive; i++)
if (dr_select[i])
(void)printf("%c%c ", dr_name[i][0],
--- 486,492 ----
ndrives * 3 - 6, "");
else
(void)printf("%*s faults cpu\n", ndrives * 3, "");
! (void)printf(" r b w %3s fre flt re pi po fr sr ", AxmName);
for (i = 0; i < dk_ndrive; i++)
if (dr_select[i])
(void)printf("%c%c ", dr_name[i][0],
>Audit-Trail:
>Unformatted:
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