#!/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,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ * * 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; }