intelcpu.sh

gistfile1.sh

#!/usr/bin/sh
#
# intelcpi - measure CPI and utilization on Intel processors.
#
# USAGE: intelcpi [interval]
#   eg,
#        intelcpi 0.1		# for 0.1 second intervals
#
# CPI shows how memory intensive CPU workloads are.
#
# Copyright 2011 Joyent, Inc.  All rights reserved.
# Copyright 2011 Brendan Gregg.  All rights reserved.
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END

interval=${1:-1}		# default interval, 1 second

set -- `kstat -p unix:0:system_misc:ncpus`	# assuming no psets,
cpus=$2						# number of CPUs

pics='instr_retired.any'			# instructions
pics=$pics,'cpu_clk_unhalted.ref,sys'		# cycles

/usr/sbin/cpustat -tc $pics $interval | nawk '
        BEGIN { printf "%16s %8s %8s\n", "Instructions", "CPI", "%CPU"; }
        NR > 1 {
                total += $4;
                instructions += $5;
                cycles += $6;
	}
	NR > 1 && (((NR - 1) % '$cpus') == 0) {
		printf "%16u %8.2f %8.2f\n", instructions,
		    cycles / instructions, 
		    100 * cycles / total ;
		total = 0;
		cycles = 0;
		instructions = 0;
        }
'