#!/usr/sbin/dtrace -s
/*
* swapinfo.d - print virtual memory info (swap).
* Written using DTrace (Solaris 10 3/05)
*
* Prints swap usage details for RAM and disk based swap.
* This script is UNDER CONSTRUCTION, check for newer versions.
*
* 24-Apr-2006, ver 0.84
*
* USAGE: swapinfo.d (check for newer versions)
*
* FIELDS:
* RAM Total Total RAM installed
* RAM Unusable RAM consumed by the OBP and TSBs
* RAM Kernel Kernel resident in RAM (and usually locked)
* RAM Locked Locked memory pages from swap (Anon)
* RAM Used anon + exec + file pages used
* RAM Free free memory + page cache free
* Disk Total Total disk swap configured
* Disk Resv Disk swap allocated + reserved
* Disk Avail Disk swap available for reservation
* Swap Total Total Virtual Memory usable
* Swap Resv VM allocated + reserved
* Swap Avail VM available for reservation
* Swap MinFree VM kept free from reservations
*
* SEE ALSO: swapinfo - K9Toolkit, http://www.brendangregg.com/k9toolkit.html
* vmstat 1 2; swap -s; echo ::memstat | mdb -k
* RMCmem - The MemTool Package
* RICHPse - The SE Toolkit
* "Clearing up swap space confusion" Unix Insider, Adrian Cockcroft
* "Solaris Internals", Jim Mauro, Richard McDougall
* /usr/include/vm/anon.h, /usr/include/sys/systm.h
*
* COPYRIGHT: Copyright (c) 2005, 2006 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
*
* Author: Brendan Gregg [Sydney, Australia]
*
* 11-Jun-2005 Brendan Gregg Created this.
* 24-Apr-2006 " " Improved disk measurements; changed terms.
*/
#pragma D option quiet
#pragma D option bufsize=16k
inline int DEBUG = 0;
dtrace:::BEGIN
{
/* Debug stats */
this->ani_max = `k_anoninfo.ani_max;
this->ani_phys_resv = `k_anoninfo.ani_phys_resv;
this->ani_mem_resv = `k_anoninfo.ani_mem_resv;
this->ani_locked = `k_anoninfo.ani_locked_swap;
this->availrmem = `availrmem;
/* RAM stats */
this->ram_total = `physinstalled;
this->unusable = `physinstalled - `physmem;
this->locked = `pages_locked;
this->ram_used = `availrmem - `freemem;
this->freemem = `freemem;
this->kernel = `physmem - `pages_locked - `availrmem;
/* Disk stats */
this->disk_total = `k_anoninfo.ani_max;
this->disk_resv = `k_anoninfo.ani_phys_resv;
this->disk_avail = this->disk_total - this->disk_resv;
/* Total Swap stats */
this->minfree = `swapfs_minfree;
this->reserve = `swapfs_reserve;
/* this is TOTAL_AVAILABLE_SWAP from /usr/include/vm/anon.h, */
this->swap_total = `k_anoninfo.ani_max +
(`availrmem - `swapfs_minfree > 0 ?
`availrmem - `swapfs_minfree : 0);
/* this is CURRENT_TOTAL_AVAILABLE_SWAP from /usr/include/vm/anon.h, */
this->swap_avail = `k_anoninfo.ani_max - `k_anoninfo.ani_phys_resv +
(`availrmem - `swapfs_minfree > 0 ?
`availrmem - `swapfs_minfree : 0);
this->swap_resv = this->swap_total - this->swap_avail;
/* Convert to Mbytes */
this->ani_phys_resv *= `_pagesize; this->ani_phys_resv /= 1048576;
this->ani_mem_resv *= `_pagesize; this->ani_mem_resv /= 1048576;
this->ani_locked *= `_pagesize; this->ani_locked /= 1048576;
this->ani_max *= `_pagesize; this->ani_max /= 1048576;
this->availrmem *= `_pagesize; this->availrmem /= 1048576;
this->ram_total *= `_pagesize; this->ram_total /= 1048576;
this->unusable *= `_pagesize; this->unusable /= 1048576;
this->kernel *= `_pagesize; this->kernel /= 1048576;
this->locked *= `_pagesize; this->locked /= 1048576;
this->ram_used *= `_pagesize; this->ram_used /= 1048576;
this->freemem *= `_pagesize; this->freemem /= 1048576;
this->disk_total *= `_pagesize; this->disk_total /= 1048576;
this->disk_resv *= `_pagesize; this->disk_resv /= 1048576;
this->disk_avail *= `_pagesize; this->disk_avail /= 1048576;
this->swap_total *= `_pagesize; this->swap_total /= 1048576;
this->swap_avail *= `_pagesize; this->swap_avail /= 1048576;
this->swap_resv *= `_pagesize; this->swap_resv /= 1048576;
this->minfree *= `_pagesize; this->minfree /= 1048576;
this->reserve *= `_pagesize; this->reserve /= 1048576;
/* Print debug */
DEBUG ? printf("DEBUG availrmem %5d MB\n", this->availrmem) : 1;
DEBUG ? printf("DEBUG freemem %5d MB\n", this->freemem) : 1;
DEBUG ? printf("DEBUG ani_max %5d MB\n", this->ani_max) : 1;
DEBUG ? printf("DEBUG ani_phys_re %5d MB\n", this->ani_phys_resv) : 1;
DEBUG ? printf("DEBUG ani_mem_re %5d MB\n", this->ani_mem_resv) : 1;
DEBUG ? printf("DEBUG ani_locked %5d MB\n", this->ani_locked) : 1;
DEBUG ? printf("DEBUG reserve %5d MB\n", this->reserve) : 1;
DEBUG ? printf("\n") : 1;
/* Print report */
printf("RAM _______Total %5d MB\n", this->ram_total);
printf("RAM Unusable %5d MB\n", this->unusable);
printf("RAM Kernel %5d MB\n", this->kernel);
printf("RAM Locked %5d MB\n", this->locked);
printf("RAM Used %5d MB\n", this->ram_used);
printf("RAM Free %5d MB\n", this->freemem);
printf("\n");
printf("Disk _______Total %5d MB\n", this->disk_total);
printf("Disk Resv %5d MB\n", this->disk_resv);
printf("Disk Avail %5d MB\n", this->disk_avail);
printf("\n");
printf("Swap _______Total %5d MB\n", this->swap_total);
printf("Swap Resv %5d MB\n", this->swap_resv);
printf("Swap Avail %5d MB\n", this->swap_avail);
printf("Swap (Minfree) %5d MB\n", this->minfree);
DEBUG ? printf("\nNow run other commands for confirmation.\n") : 1;
! DEBUG ? exit(0) : 1;
}