75 lines
1.6 KiB
D
Executable File
75 lines
1.6 KiB
D
Executable File
#!/usr/sbin/dtrace -s
|
|
/*
|
|
* cswstat.d - context switch time stat.
|
|
* Uses DTrace (Solaris 10 03/05)
|
|
*
|
|
* This prints a context switch count and consumed time for context
|
|
* switching every second.
|
|
*
|
|
* $Id: cswstat.d 15 2007-09-11 09:09:25Z brendan $
|
|
*
|
|
* USAGE: cswstat.d
|
|
*
|
|
* FIELDS:
|
|
* TIME Current time
|
|
* NUM Number of context switches
|
|
* CSWTIME(us) Time consumed context switching, us
|
|
* AVGTIME(us) Average context switch time, us
|
|
*
|
|
* THANKS: Toomas Soome
|
|
*
|
|
* COPYRIGHT: Copyright (c) 2005 Brendan Gregg.
|
|
*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License, Version 1.0 only
|
|
* (the "License"). You may not use this file except in compliance
|
|
* with the License.
|
|
*
|
|
* You can obtain a copy of the license at Docs/cddl1.txt
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* CDDL HEADER END
|
|
*
|
|
* 17-May-2005 Brendan Gregg Created this.
|
|
* 03-Nov-2005 " " Last update.
|
|
*/
|
|
|
|
#pragma D option quiet
|
|
|
|
dtrace:::BEGIN
|
|
{
|
|
/* print header */
|
|
printf("%-20s %8s %12s %12s\n", "TIME", "NUM", "CSWTIME(us)",
|
|
"AVGTIME(us)");
|
|
times = 0;
|
|
num = 0;
|
|
}
|
|
|
|
sched:::off-cpu
|
|
{
|
|
/* csw start */
|
|
num++;
|
|
start[cpu] = timestamp;
|
|
}
|
|
|
|
sched:::on-cpu
|
|
/start[cpu]/
|
|
{
|
|
/* csw end */
|
|
times += timestamp - start[cpu];
|
|
start[cpu] = 0;
|
|
}
|
|
|
|
profile:::tick-1sec
|
|
{
|
|
/* print output */
|
|
printf("%20Y %8d %12d %12d\n", walltimestamp, num, times/1000,
|
|
num == 0 ? 0 : times/(1000 * num));
|
|
times = 0;
|
|
num = 0;
|
|
}
|