1#!/usr/sbin/dtrace -s
2/*
3 * loads.d - print load averages. Written using DTrace (Solaris 10 3/05).
4 *
5 * These are the same load averages that the "uptime" command prints.
6 * The purpose of this script is to demonstrate fetching these values
7 * from the DTrace language.
8 *
9 * 10-Jun-2005, ver 0.90
10 *
11 * USAGE:	loads.d
12 *
13 * SEE ALSO:	uptime(1)
14 *
15 * The first field is the 1 minute average, the second is the 5 minute,
16 * and the third is the 15 minute average. The value represents the average
17 * number of runnable threads in the system, a value higher than your
18 * CPU (core/hwthread) count may be a sign of CPU saturation.
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 * 10-Jun-2005	Brendan Gregg	Created this.
37 */
38
39#pragma D option quiet
40
41dtrace:::BEGIN
42{
43	/* fetch load averages */
44	this->fscale = `averunnable.fscale;
45	this->load1a  = `averunnable.ldavg[0] / this->fscale;
46	this->load5a  = `averunnable.ldavg[1] / this->fscale;
47	this->load15a = `averunnable.ldavg[2] / this->fscale;
48	this->load1b  = ((`averunnable.ldavg[0] % this->fscale) * 100) / this->fscale;
49	this->load5b  = ((`averunnable.ldavg[1] % this->fscale) * 100) / this->fscale;
50	this->load15b = ((`averunnable.ldavg[2] % this->fscale) * 100) / this->fscale;
51
52	/* print load average */
53	printf("%Y,  load average: %d.%02d, %d.%02d, %d.%02d\n",
54	    walltimestamp, this->load1a, this->load1b, this->load5a,
55	    this->load5b, this->load15a, this->load15b);
56
57	exit(0);
58}
59