1#!/usr/sbin/dtrace -s 2/*- 3 * Copyright 2014 John-Mark Gurney. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29#pragma D option quiet 30#pragma D option dynvarsize=16m 31 32dtrace:::BEGIN 33{ 34 printf("Tracing... Hit Ctrl-C to end.\n"); 35} 36 37io:::start 38{ 39 start_time[arg0] = timestamp; 40} 41 42io:::done 43/this->start = start_time[arg0]/ 44{ 45 this->delta = (timestamp - this->start) / 1000; 46 @q[args[1]->device_name, args[1]->unit_number] = 47 lquantize(this->delta, 4000, 80000, 4000); 48 @max[args[1]->device_name, args[1]->unit_number] = max(this->delta); 49 @avg[args[1]->device_name, args[1]->unit_number] = avg(this->delta); 50 @stddev[args[1]->device_name, args[1]->unit_number] = stddev(this->delta); 51 start_time[arg0] = 0; 52} 53 54tick-10s 55{ 56 printa(" %s (%d), us:\n%@d\n", @q); 57 printa("max%s (%d), us:\n%@d\n", @max); 58 printa("avg%s (%d), us:\n%@d\n", @avg); 59 printa("stddev%s (%d), us:\n%@d\n", @stddev); 60 61 clear(@q); 62 clear(@max); 63 clear(@avg); 64 clear(@stddev); 65} 66