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Date:      Wed, 4 Apr 2018 09:11:16 +0000 (UTC)
From:      Peter Holm <pho@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-user@freebsd.org
Subject:   svn commit: r332001 - user/pho/stress2/misc
Message-ID:  <201804040911.w349BG8S070186@repo.freebsd.org>

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Author: pho
Date: Wed Apr  4 09:11:15 2018
New Revision: 332001
URL: https://svnweb.freebsd.org/changeset/base/332001

Log:
  Scale back memory usage when no swap disk is available.
  
  Sponsored by:	Dell EMC Isilon

Modified:
  user/pho/stress2/misc/crossmp3.sh

Modified: user/pho/stress2/misc/crossmp3.sh
==============================================================================
--- user/pho/stress2/misc/crossmp3.sh	Wed Apr  4 09:05:48 2018	(r332000)
+++ user/pho/stress2/misc/crossmp3.sh	Wed Apr  4 09:11:15 2018	(r332001)
@@ -41,14 +41,15 @@
 . ../default.cfg
 
 CONT=/tmp/crossmp3.continue
-N=`sysctl -n hw.ncpu`
-usermem=`sysctl -n hw.usermem`
-[ `swapinfo | wc -l` -eq 1 ] && usermem=$((usermem/100*80))
-size=$((usermem / 1024 / 1024 / N))
+if [ $# -eq 0 ]; then
+	N=`sysctl -n hw.ncpu`
+	usermem=`sysctl -n hw.usermem`
+	[ `sysctl -n vm.swap_total` -eq 0 ] && usermem=$((usermem / 2))
+	size=$((usermem / 1024 / 1024 / N))
+	echo "Using $N memory disks of size $size MB."
 
-mounts=$N		# Number of parallel scripts
+	mounts=$N		# Number of parallel scripts
 
-if [ $# -eq 0 ]; then
 	for i in `jot $mounts`; do
 		m=$(( i + mdstart - 1 ))
 		[ ! -d ${mntpoint}$m ] &&
@@ -68,14 +69,13 @@ if [ $# -eq 0 ]; then
 		./$0 $m &
 		./$0 find &
 	done
-
 	wait
 
 	for i in `jot $mounts`; do
 		m=$(( i + mdstart - 1 ))
 		mdconfig -d -u $m
 	done
-
+	exit 0
 else
 	if [ $1 = find ]; then
 		while [ -f $CONT ]; do



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