3 * Copyright 2014 John-Mark Gurney.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
31 #pragma D option quiet
33 /* from http://www.mail-archive.com/dtrace-discuss@opensolaris.org/msg03755.html */
34 #pragma D option aggsize=8m
35 #pragma D option bufsize=16m
36 #pragma D option dynvarsize=32m
38 #pragma D option aggrate=0
39 #pragma D option cleanrate=50Hz
44 printf("Tracing... Hit Ctrl-C to end.\n");
50 start_time[arg0] = timestamp;
54 /this->start = start_time[arg0]/
56 this->delta = (timestamp - this->start) / 1000;
57 @q[args[1]->device_name, args[1]->unit_number] =
58 lquantize(this->delta, 4000, 80000, 4000);
59 @max[args[1]->device_name, args[1]->unit_number] = max(this->delta);
60 @avg[args[1]->device_name, args[1]->unit_number] = avg(this->delta);
61 @stddev[args[1]->device_name, args[1]->unit_number] = stddev(this->delta);
67 printf("total time, us: %d\n", (timestamp - dstart) / 1000);
68 printa(" %s (%d), us:\n%@d\n", @q);
69 printa("max%s (%d), us: %@d\n", @max);
70 printa("avg%s (%d), us: %@d\n", @avg);
71 printa("stddev%s (%d), us: %@d\n", @stddev);