Author: gnn
Date: Fri Jul 20 23:56:23 2012
New Revision: 238660
URL: http://svn.freebsd.org/changeset/base/238660
Log:
Add a new script, hotopen, which shows what uid is opening files
on a per second basis. While here clean up the Makefile as well.
MFC after: 1 week
Added:
head/share/dtrace/hotopen (contents, props changed)
Modified:
head/share/dtrace/Makefile
Modified: head/share/dtrace/Makefile
==============================================================================
--- head/share/dtrace/Makefile Fri Jul 20 21:09:36 2012 (r238659)
+++ head/share/dtrace/Makefile Fri Jul 20 23:56:23 2012 (r238660)
@@ -12,9 +12,9 @@ SUBDIR= ${_toolkit}
_toolkit= toolkit
.endif
-SCRIPTS= nfsclienttime
+SCRIPTS= nfsclienttime hotopen
-SCRIPTSDIR= ${SHAREDIR}/dtrace/
+SCRIPTSDIR= ${SHAREDIR}/dtrace
NO_OBJ=
Added: head/share/dtrace/hotopen
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/dtrace/hotopen Fri Jul 20 23:56:23 2012 (r238660)
@@ -0,0 +1,61 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 George V. Neville-Neil
+# 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.
+#
+# $FreeBSD$
+#
+# The hotopen D script periodically outputs table of which UIDs
+# are opening files. This is a very quick way to find out if
+# a paritcular user is thrashing a system with rapid calls to
+# open/close.
+#
+# Usage: hotopen
+#
+
+/usr/sbin/dtrace -n '
+#pragma D option quiet
+BEGIN
+{
+ printf("Files opened per UID in the last second.\n");
+}
+
+syscall::open:entry
+{
+ @files[uid] = count();
+ output = 1;
+}
+
+tick-1sec
+/output != 0/
+{
+ printf("%-20Y \n", walltimestamp);
+ printa("uid %d\tcount %@d\n", @files, @files);
+ trunc(@files);
+ output = 0;
+}
+'
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