#!/usr/sbin/dtrace -s
/*
* cpuwalk.d - Measure which CPUs a process runs on.
* Written using DTrace (Solaris 10 3/05)
*
* This program is for multi-CPU servers, and can help identify if a process
* is running on multiple CPUs concurrently or not.
*
* $Id: cpuwalk.d 3 2007-08-01 10:50:08Z brendan $
*
* USAGE: cpuwalk.d [duration]
* eg,
* cpuwalk.d 10 # sample for 10 seconds
* cpuwalk.d # sample until Ctrl-C is hit
*
* FIELDS:
* value CPU id
* count Number of 1000 hz samples on this CPU
*
* 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
*
* 22-Sep-2005 Brendan Gregg Created this.
* 14-Feb-2006 " " Last update.
*/
#pragma D option quiet
#pragma D option defaultargs
inline int MAXCPUID = 1024;
dtrace:::BEGIN
{
$1 ? printf("Sampling...\n") :
printf("Sampling... Hit Ctrl-C to end.\n");
seconds = 0;
}
profile:::profile-1000hz
/pid/
{
@sample[pid, execname] = lquantize(cpu, 0, MAXCPUID, 1);
}
profile:::tick-1sec
{
seconds++;
}
profile:::tick-1sec
/seconds == $1/
{
exit(0);
}
dtrace:::END
{
printa("\n PID: %-8d CMD: %s\n%@d", @sample);
}