#!/usr/sbin/dtrace -s
/*
* vmstat-p.d - vmstat -p demo in DTrace.
* Written using DTrace (Solaris 10 3/05).
*
* This has been written to demonstrate fetching similar data as vmstat
* from DTrace. This program is intended as a starting point for other
* DTrace scripts, by beginning with familiar statistics.
*
* 08-Jan-2006, ver 0.91
*
* USAGE: vmstat-p.d
*
* FIELDS:
* swap virtual memory free Kbytes
* free free RAM Kbytes
* re page reclaims Kbytes
* mf minor faults Kbytes
* sr scan rate pages
* epi executable page ins Kbytes
* epo executable page outs Kbytes
* epf executable frees Kbytes
* api anonymous page ins Kbytes
* apo anonymous page outs Kbytes
* apf anonymous frees Kbytes
* fpi filesystem page ins Kbytes
* fpo filesystem page outs Kbytes
* fpf filesystem frees Kbytes
*
* NOTES:
* Most of the statistics are in units of kilobytes, unlike the
* original vmstat command which sometimes uses page counts.
* As this program does not use Kstat, there is no summary since
* boot line. Free RAM is both free free + cache free.
*
* SEE ALSO: vmstat(1M)
*
* COPYRIGHT: Copyright (c) 2005 Brendan Gregg.
*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at Docs/cddl1.txt
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* CDDL HEADER END
*
* 11-Jun-2005 Brendan Gregg Created this.
*/
#pragma D option quiet
inline int SCREEN = 21;
/*
* Initialise variables
*/
dtrace:::BEGIN
{
pi = 0; po = 0; re = 0; sr = 0; mf = 0; fr = 0;
sy = 0; in = 0; cs = 0; maj = 0; cow = 0; pro = 0;
epi = 0; epo = 0; epf = 0; api = 0; apo = 0; apf = 0;
fpi = 0; fpo = 0; fpf = 0;
lines = SCREEN + 1;
}
/*
* Print header
*/
dtrace:::BEGIN,
tick-1sec
/lines++ > SCREEN/
{
printf("%14s %13s %16s %14s %13s\n",
"memory", "page", "executable", "anonymous", "filesystem");
printf("%9s %7s %5s %4s %3s ",
"swap", "free", "re", "mf", "sr");
printf("%4s %4s %4s %4s %4s %4s %4s %4s %4s\n",
"epi", "epo", "epf", "api", "apo", "apf", "fpi", "fpo", "fpf");
lines = 0;
}
/*
* Probe events
*/
vminfo:::pgrec { re += arg0; }
vminfo:::scan { sr += arg0; }
vminfo:::as_fault { mf += arg0; }
vminfo:::execpgin { epi += arg0; }
vminfo:::execpgout { epo += arg0; }
vminfo:::execfree { epf += arg0; }
vminfo:::anonpgin { api += arg0; }
vminfo:::anonpgout { apo += arg0; }
vminfo:::anonfree { apf += arg0; }
vminfo:::fspgin { fpi += arg0; }
vminfo:::fspgout { fpo += arg0; }
vminfo:::fsfree { fpf += arg0; }
/*
* Print output line
*/
profile:::tick-1sec
{
/* fetch free mem */
this->free = `freemem;
/*
* fetch free swap
*
* free swap is described in /usr/include/vm/anon.h as,
* MAX(ani_max - ani_resv, 0) + (availrmem - swapfs_minfree)
*/
this->ani_max = `k_anoninfo.ani_max;
this->ani_resv = `k_anoninfo.ani_phys_resv + `k_anoninfo.ani_mem_resv;
this->swap = (this->ani_max - this->ani_resv > 0 ?
this->ani_max - this->ani_resv : 0) + `availrmem - `swapfs_minfree;
/* fetch w */
this->w = `nswapped;
/* convert to Kbytes */
epi *= `_pagesize / 1024;
epo *= `_pagesize / 1024;
epf *= `_pagesize / 1024;
api *= `_pagesize / 1024;
apo *= `_pagesize / 1024;
apf *= `_pagesize / 1024;
fpi *= `_pagesize / 1024;
fpo *= `_pagesize / 1024;
fpf *= `_pagesize / 1024;
re *= `_pagesize / 1024;
sr *= `_pagesize / 1024;
mf *= `_pagesize / 1024;
this->swap *= `_pagesize / 1024;
this->free *= `_pagesize / 1024;
/* print line */
printf("%9d %7d %5d %4d %3d ",
this->swap, this->free, re, mf, sr);
printf("%4d %4d %4d %4d %4d %4d %4d %4d %4d\n",
epi, epo, epf, api, apo, apf, fpi, fpo, fpf);
/* clear counters */
pi = 0; po = 0; re = 0; sr = 0; mf = 0; fr = 0;
sy = 0; in = 0; cs = 0; maj = 0; cow = 0; pro = 0;
epi = 0; epo = 0; epf = 0; api = 0; apo = 0; apf = 0;
fpi = 0; fpo = 0; fpf = 0;
}