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      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  * $Id: loads.d,v 1.1.1.1 2015/09/30 22:01:07 christos Exp $
     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  * 10-Jun-2005	   "      "	Last update.
     38  */
     39 
     40 #pragma D option quiet
     41 
     42 dtrace:::BEGIN
     43 {
     44 	/* fetch load averages */
     45 	this->load1a  = `hp_avenrun[0] / 65536;
     46 	this->load5a  = `hp_avenrun[1] / 65536;
     47 	this->load15a = `hp_avenrun[2] / 65536;
     48 	this->load1b  = ((`hp_avenrun[0] % 65536) * 100) / 65536;
     49 	this->load5b  = ((`hp_avenrun[1] % 65536) * 100) / 65536;
     50 	this->load15b = ((`hp_avenrun[2] % 65536) * 100) / 65536;
     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