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#!/usr/sbin/dtrace -s
/*-
* Copyright 2014 John-Mark Gurney.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#pragma D option quiet
#pragma D option dynvarsize=16m
dtrace:::BEGIN
{
printf("Tracing... Hit Ctrl-C to end.\n");
}
io:::start
{
start_time[arg0] = timestamp;
}
io:::done
/this->start = start_time[arg0]/
{
this->delta = (timestamp - this->start) / 1000;
@q[args[1]->device_name, args[1]->unit_number] =
lquantize(this->delta, 4000, 80000, 4000);
@max[args[1]->device_name, args[1]->unit_number] = max(this->delta);
@avg[args[1]->device_name, args[1]->unit_number] = avg(this->delta);
@stddev[args[1]->device_name, args[1]->unit_number] = stddev(this->delta);
start_time[arg0] = 0;
}
tick-10s
{
printa(" %s (%d), us:\n%@d\n", @q);
printa("max%s (%d), us:\n%@d\n", @max);
printa("avg%s (%d), us:\n%@d\n", @avg);
printa("stddev%s (%d), us:\n%@d\n", @stddev);
clear(@q);
clear(@max);
clear(@avg);
clear(@stddev);
}
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