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      1 #!/usr/sbin/dtrace -Cs
      2 /*
      3  * anonpgpid.d - anonymous memory paging info by process on CPU.
      4  *               Written using DTrace (Solaris 10 3/05).
      5  *
      6  * This scripts may help identify which processes are affected by a system
      7  * with low memory, which is paging to the physical swap device. A report
      8  * of the process on the CPU when paging occured is printed.
      9  *
     10  * $Id: anonpgpid.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $
     11  *
     12  * USAGE:	anonpgpid.d 	# hit Ctrl-C to end
     13  *
     14  * FIELDS:
     15  *		PID		Process ID
     16  *		CMD		Process name
     17  *		D		Direction, Read or Write
     18  *		BYTES		Total bytes during sample
     19  *
     20  * NOTES:
     21  *
     22  * This program is currently an approximation - often the process when writing
     23  * pages to swap will be "pageout" the pageout scanner, or "rcapd" the
     24  * resource capping daemon.
     25  *
     26  * THANKS: James Dickens
     27  *
     28  * COPYRIGHT: Copyright (c) 2006 Brendan Gregg.
     29  *
     30  * CDDL HEADER START
     31  *
     32  *  The contents of this file are subject to the terms of the
     33  *  Common Development and Distribution License, Version 1.0 only
     34  *  (the "License").  You may not use this file except in compliance
     35  *  with the License.
     36  *
     37  *  You can obtain a copy of the license at Docs/cddl1.txt
     38  *  or http://www.opensolaris.org/os/licensing.
     39  *  See the License for the specific language governing permissions
     40  *  and limitations under the License.
     41  *
     42  * CDDL HEADER END
     43  *
     44  * TODO:
     45  *
     46  * Track processes accurately. This is a little difficult - anonpgout
     47  * occurs asynchronously to the process, and events related to this don't
     48  * point back to the process.
     49  *
     50  * Author: Brendan Gregg  [Sydney, Australia]
     51  *
     52  * 25-Jul-2005	Brendan Gregg	Created this.
     53  * 18-Feb-2006	   "      "	Last update.
     54  */
     55 
     56 #include <sys/vnode.h>
     57 
     58 #pragma D option quiet
     59 
     60 dtrace:::BEGIN
     61 {
     62 	printf("Tracing... Hit Ctrl-C to end.\n");
     63 }
     64 
     65 fbt::pageio_setup:entry
     66 /((args[2]->v_flag & (VISSWAP | VSWAPLIKE)) != 0)/
     67 {
     68 	@total[pid, execname, args[3] & B_READ ? "R" : "W"] = sum(arg1);
     69 }
     70 
     71 dtrace:::END
     72 {
     73 	printf("%6s %-16s %1s %s\n", "PID", "CMD", "D", "BYTES");
     74 	printa("%6d %-16s %1s %@d\n", @total);
     75 }
     76