1235368Sgnn#!/usr/sbin/dtrace -s
2/*
3 * cpuwalk.d - Measure which CPUs a process runs on.
4 *             Written using DTrace (Solaris 10 3/05)
5 *
6 * This program is for multi-CPU servers, and can help identify if a process
7 * is running on multiple CPUs concurrently or not.
8 *
9 * $Id: cpuwalk.d 3 2007-08-01 10:50:08Z brendan $
10 *
11 * USAGE:	cpuwalk.d [duration]
12 *	   eg,
13 *		cpuwalk.d 10		# sample for 10 seconds
14 *		cpuwalk.d		# sample until Ctrl-C is hit
15 *
16 * FIELDS:
17 *		value		CPU id
18 *		count		Number of 1000 hz samples on this CPU
19 *
20 * COPYRIGHT: Copyright (c) 2005 Brendan Gregg.
21 *
22 * CDDL HEADER START
23 *
24 *  The contents of this file are subject to the terms of the
25 *  Common Development and Distribution License, Version 1.0 only
26 *  (the "License").  You may not use this file except in compliance
27 *  with the License.
28 *
29 *  You can obtain a copy of the license at Docs/cddl1.txt
30 *  or http://www.opensolaris.org/os/licensing.
31 *  See the License for the specific language governing permissions
32 *  and limitations under the License.
33 *
34 * CDDL HEADER END
35 *
36 * 22-Sep-2005  Brendan Gregg   Created this.
37 * 14-Feb-2006	   "      "	Last update.
38 */
39
40#pragma D option quiet
41#pragma D option defaultargs
42
43inline int MAXCPUID = 1024;
44
45dtrace:::BEGIN
46{
47	$1 ? printf("Sampling...\n") :
48	    printf("Sampling... Hit Ctrl-C to end.\n");
49	seconds = 0;
50}
51
52profile:::profile-1000hz
53/pid/
54{
55	@sample[pid, execname] = lquantize(cpu, 0, MAXCPUID, 1);
56}
57
58profile:::tick-1sec
59{
60	seconds++;
61}
62
63profile:::tick-1sec
64/seconds == $1/
65{
66	exit(0);
67}
68
69dtrace:::END
70{
71	printa("\n     PID: %-8d CMD: %s\n%@d", @sample);
72}
73