#!/usr/bin/sh # # xvmstat - extended vmstat demo in DTrace. # Written using DTrace (Solaris 10 3/05). # # This has been written to demonstrate fetching similar data as vmstat # from DTrace, with a few extra fields. # # 01-Mar-2006, ver 0.85 # # USAGE: xvmstat [interval [count]] # # FIELDS: # w swapped out LWPs number # swap virtual memory free Mbytes # free free RAM Mbytes # re page reclaims pages/sec # maj major faults pages/sec # mf minor faults pages/sec # cow copy-on-write faults pages/sec # pro protection faults pages/sec # sr scan rate pages/sec # epi executable page ins pages/sec # epo executable page outs pages/sec # epf executable frees pages/sec # api anonymous page ins pages/sec # apo anonymous page outs pages/sec # apf anonymous frees pages/sec # fpi filesystem page ins pages/sec # fpo filesystem page outs pages/sec # fpf filesystem frees pages/sec # # NOTES: # - Most of the statistics are in units of pages, unlike the # original vmstat command which sometimes uses kilobytes. # - 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 # # 12-Jun-2005 Brendan Gregg Created this. # ############################## # --- Process Arguments --- # ### default values interval=1; count=-1 ### check arguments if [ "$1" = "-h" -o "$1" = "--help" ]; then cat <<-END >&2 USAGE: xvmstat [interval [count]] xvmstat # 1 second samples, infinite eg, xvmstat 1 # print every 1 second xvmstat 5 6 # print every 5 seconds, 6 times END exit 1 fi ### argument logic if [ "$1" -gt 0 ]; then interval=$1; count=-1; shift fi if [ "$1" -gt 0 ]; then count=$1; shift fi if [ $interval -eq 0 ]; then interval=1 fi ################################# # --- Main Program, DTrace --- # /usr/sbin/dtrace -n ' #pragma D option quiet /* * Command line arguments */ inline int INTERVAL = '$interval'; inline int COUNTER = '$count'; inline int SCREEN = 21; /* * Initialise variables */ dtrace:::BEGIN { re = 0; sr = 0; mf = 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; counts = COUNTER; secs = INTERVAL; first = 1; } profile:::tick-1sec { secs--; } /* * Print header */ dtrace:::BEGIN, profile:::tick-1sec /first || (secs == 0 && lines > SCREEN)/ { printf("%2s %6s %5s %5s %3s %4s %3s %3s %3s ", "w", "swap", "free", "re", "maj", "mf", "cow", "pro", "sr"); printf("%3s %3s %3s %3s %3s %3s %3s %3s %3s\n", "epi", "epo", "epf", "api", "apo", "apf", "fpi", "fpo", "fpf"); lines = 0; first = 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; } vminfo:::maj_fault { maj += arg0; } vminfo:::cow_fault { cow += arg0; } vminfo:::prot_fault { pro += arg0; } /* * Print output line */ profile:::tick-1sec /secs == 0/ { /* 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 Mbytes */ this->swap *= `_pagesize; this->swap /= 1048576; this->free *= `_pagesize; this->free /= 1048576; /* convert to per second values */ re /= INTERVAL; maj /= INTERVAL; mf /= INTERVAL; cow /= INTERVAL; pro /= INTERVAL; sr /= INTERVAL; epi /= INTERVAL; epo /= INTERVAL; epf /= INTERVAL; api /= INTERVAL; apo /= INTERVAL; apf /= INTERVAL; fpi /= INTERVAL; fpo /= INTERVAL; fpf /= INTERVAL; /* print line */ printf("%2d %6d %5d %5d %3d %4d %3d %3d %3d ", this->w, this->swap, this->free, re, maj, mf, cow, pro, sr); printf("%3d %3d %3d %3d %3d %3d %3d %3d %3d\n", epi, epo, epf, api, apo, apf, fpi, fpo, fpf); /* clear counters */ re = 0; sr = 0; mf = 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; /* process counts */ secs = INTERVAL; counts--; lines++; } /* * End */ profile:::tick-1sec /counts == 0/ { exit(0); } '