#!/usr/sbin/dtrace -s /* * vmstat.d - vmstat demo in DTrace. * Written using DTrace (Solaris 10 3/05). * * This has been written to demonstrate fetching the same data as vmstat * from DTrace. This program is intended as a starting point for other * DTrace scripts, by beginning with familiar statistics. * * $Id: vmstat.d,v 1.1.1.1 2015/09/30 22:01:07 christos Exp $ * * USAGE: vmstat.d * * FIELDS: * w swapped out LWPs number * swap virtual memory free Kbytes * free free RAM Kbytes * re page reclaims Kbytes * mf minor faults Kbytes * pi page ins Kbytes * po page outs Kbytes * fr pages freed Kbytes * sr scan rate pages * in interrupts number * sy system calls number * cs context switches number * * 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. * 08-Jan-2006 " " Last update. */ #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; lines = SCREEN + 1; } /* * Print header */ dtrace:::BEGIN, profile:::tick-1sec /lines++ > SCREEN/ { printf(" %1s %10s %8s %5s %5s %4s %4s %4s %4s %5s %6s %4s\n", "w", "swap", "free", "re", "mf", "pi", "po", "fr", "sr", "in", "sy", "cs"); lines = 0; } /* * Probe events */ vminfo:::pgpgin { pi += arg0; } vminfo:::pgpgout { po += arg0; } vminfo:::pgrec { re += arg0; } vminfo:::scan { sr += arg0; } vminfo:::as_fault { mf += arg0; } vminfo:::dfree { fr += arg0; } syscall:::entry { sy++; } sdt:::interrupt-start { in++; } sched::resume:on-cpu { cs++; } /* * 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 */ pi *= `_pagesize / 1024; po *= `_pagesize / 1024; re *= `_pagesize / 1024; sr *= `_pagesize / 1024; mf *= `_pagesize / 1024; fr *= `_pagesize / 1024; this->swap *= `_pagesize / 1024; this->free *= `_pagesize / 1024; /* print line */ printf(" %1d %10d %8d %5d %5d %4d %4d %4d %4d %5d %6d %4d\n", this->w, this->swap, this->free, re, mf, pi, po, fr, sr, in, sy, cs); /* clear counters */ pi = 0; po = 0; re = 0; sr = 0; mf = 0; fr = 0; sy = 0; in = 0; cs = 0; }