#
# 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
#

#
# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
#ident	"%Z%%M%	%I%	%E% SMI"

script()
{
	$dtrace -s /dev/stdin -x bufpolicy=$1 $1 <<EOF

	#pragma D option quiet
	#pragma D option statusrate=1hz

	uint64_t total;
	int thresh;

	BEGIN
	{
		start = timestamp;
		thresh = 10;
	}

	sched:::on-cpu
	/pid == \$pid/
	{
		self->on = vtimestamp;
	}

	sched:::off-cpu
	/self->on/
	{
		total += vtimestamp - self->on;
	}

	tick-1sec
	/i++ == 10/
	{
		exit(0);
	}

	END
	/((total * 100) / (timestamp - start)) > thresh/
	{
		printf("'%s' buffering policy took %d%% of CPU; ",
		    \$\$1, ((total * 100) / (timestamp - start)));
		printf("expected no more than %d%%!\n", thresh);
		exit(1);
	}
EOF
}

if [ $# != 1 ]; then
	echo expected one argument: '<'dtrace-path'>'
	exit 2
fi

dtrace=$1

for policy in "fill ring switch"; do
	script $policy

	status=$?

	if [ "$status" -ne 0 ]; then
		exit $status
	fi
done

exit 0