From owner-svn-src-user@freebsd.org  Tue Mar 29 10:27:26 2016
Return-Path: <owner-svn-src-user@freebsd.org>
Delivered-To: svn-src-user@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id F3577AE1C9C
 for <svn-src-user@mailman.ysv.freebsd.org>;
 Tue, 29 Mar 2016 10:27:26 +0000 (UTC) (envelope-from pho@FreeBSD.org)
Received: from repo.freebsd.org (repo.freebsd.org
 [IPv6:2610:1c1:1:6068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id C55E51F71;
 Tue, 29 Mar 2016 10:27:26 +0000 (UTC) (envelope-from pho@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u2TARQ1q061890;
 Tue, 29 Mar 2016 10:27:26 GMT (envelope-from pho@FreeBSD.org)
Received: (from pho@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id u2TARQ5c061889;
 Tue, 29 Mar 2016 10:27:26 GMT (envelope-from pho@FreeBSD.org)
Message-Id: <201603291027.u2TARQ5c061889@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: pho set sender to pho@FreeBSD.org
 using -f
From: Peter Holm <pho@FreeBSD.org>
Date: Tue, 29 Mar 2016 10:27:26 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-user@freebsd.org
Subject: svn commit: r297380 - user/pho/stress2/misc
X-SVN-Group: user
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-user@freebsd.org
X-Mailman-Version: 2.1.21
Precedence: list
List-Id: "SVN commit messages for the experimental &quot; user&quot;
 src tree" <svn-src-user.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-user>,
 <mailto:svn-src-user-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-user/>
List-Post: <mailto:svn-src-user@freebsd.org>
List-Help: <mailto:svn-src-user-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-user>,
 <mailto:svn-src-user-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 29 Mar 2016 10:27:27 -0000

Author: pho
Date: Tue Mar 29 10:27:25 2016
New Revision: 297380
URL: https://svnweb.freebsd.org/changeset/base/297380

Log:
  Trim MAXVNODES based on problem found. Limit tmpfs size.
  
  Sponsored by:	EMC / Isilon Storage Division

Modified:
  user/pho/stress2/misc/core5.sh

Modified: user/pho/stress2/misc/core5.sh
==============================================================================
--- user/pho/stress2/misc/core5.sh	Tue Mar 29 10:25:01 2016	(r297379)
+++ user/pho/stress2/misc/core5.sh	Tue Mar 29 10:27:25 2016	(r297380)
@@ -34,6 +34,10 @@
 # http://people.freebsd.org/~pho/stress/log/core5.txt
 # Fixed by r279237.
 
+# 20150714 Slowdown seen with core5 waiting in vlruwk.
+# sysctl vfs.vlru_allow_cache_src=1 resolves this.
+# For now change MAXVNODES from 1.000 to 1.500.
+
 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
 
 . ../default.cfg
@@ -102,12 +106,12 @@ cd $mntpoint
 mp2=${mntpoint}2
 [ -d $mp2 ] || mkdir $mp2
 mount | grep -q "on $mp2 " && umount $mp2
-mount -t tmpfs tmpfs $mp2 || exit 1
+mount -o size=2g -t tmpfs tmpfs $mp2 || exit 1
 for i in `jot 10`; do
 	(cd $mp2; /tmp/core5-dumper$i ) &
 done
 maxvnodes=`sysctl -n kern.maxvnodes`
-trap "sysctl kern.maxvnodes=$maxvnodes > /dev/null" 0
+trap "sysctl kern.maxvnodes=$maxvnodes > /dev/null" EXIT INT
 $mntpoint/core5 $mntpoint/dir
 wait
 umount $mp2
@@ -131,7 +135,7 @@ EOF
 #include <time.h>
 #include <unistd.h>
 
-#define MAXVNODES 1000
+#define MAXVNODES 1500
 #define NBFILES 10000
 #define PARALLEL 4
 #define RTIME (10 * 60)