From owner-svn-src-head@FreeBSD.ORG  Mon Jul 16 17:48:44 2012
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 00D06106567C;
	Mon, 16 Jul 2012 17:48:44 +0000 (UTC) (envelope-from gnn@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id C79CB8FC1C;
	Mon, 16 Jul 2012 17:48:43 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q6GHmhHH066154;
	Mon, 16 Jul 2012 17:48:43 GMT (envelope-from gnn@svn.freebsd.org)
Received: (from gnn@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id q6GHmhaQ066153;
	Mon, 16 Jul 2012 17:48:43 GMT (envelope-from gnn@svn.freebsd.org)
Message-Id: <201207161748.q6GHmhaQ066153@svn.freebsd.org>
From: "George V. Neville-Neil" <gnn@FreeBSD.org>
Date: Mon, 16 Jul 2012 17:48:43 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r238535 - head/share/dtrace
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
	<svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 16 Jul 2012 17:48:44 -0000

Author: gnn
Date: Mon Jul 16 17:48:43 2012
New Revision: 238535
URL: http://svn.freebsd.org/changeset/base/238535

Log:
  Add a script that traces NFS attribute cache accesses.
  
  Submitted by:	rwatson
  MFC after:	2 weeks

Added:
  head/share/dtrace/nfsattrstats   (contents, props changed)

Added: head/share/dtrace/nfsattrstats
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/share/dtrace/nfsattrstats	Mon Jul 16 17:48:43 2012	(r238535)
@@ -0,0 +1,74 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 Robert N. M. Watson
+# All rights reserved.
+#
+# This software was developed at the University of Cambridge Computer
+# Laboratory with support from a grant from Google, Inc.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+# This script creates a trace of NFS RPCs, NFS attribute cache
+# activity, and NFS access cache activity, along with the system call
+# that instigated the activity. Notice that NFS events may happen
+# outside of the context of a system call, most likely due to the VM
+# system paging from NFS, in which case the system call name is
+# reported as "-"
+
+/usr/sbin/dtrace -n '
+#pragma D option quiet
+
+dtrace:::BEGIN
+{
+	printf("probe\targ0\texecutable\tsyscall\n");
+}
+
+syscall:::entry
+{
+
+        self->syscallname = probefunc;
+}
+
+syscall:::return
+{
+
+        self->syscallname = "";
+}
+
+nfsclient:::
+/self->syscallname != 0 && self->syscallname != ""/
+{
+
+    printf("%s\t%s\t%s\t%s\n", probemod, stringof(arg0), execname, 
+	    self->syscallname);
+}
+
+nfsclient:::
+/self->syscallname == 0 || self->syscallname == ""/
+{
+
+    printf("%s\t%s\t%s\t%s\n", probemod, stringof(arg0), execname, 
+	    self->syscallname);
+}
+'