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author | gnn <gnn@FreeBSD.org> | 2012-07-16 17:48:43 +0000 |
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committer | gnn <gnn@FreeBSD.org> | 2012-07-16 17:48:43 +0000 |
commit | 3abf0120170ad6928c403bd90bacdb74b3db3570 (patch) | |
tree | ed32b7d69c9551c88dde34dfea0cc3ae77c23ae3 /share/dtrace/nfsattrstats | |
parent | 7686baf110cb876d35360ceac3df9b822e77f923 (diff) | |
download | FreeBSD-src-3abf0120170ad6928c403bd90bacdb74b3db3570.zip FreeBSD-src-3abf0120170ad6928c403bd90bacdb74b3db3570.tar.gz |
Add a script that traces NFS attribute cache accesses.
Submitted by: rwatson
MFC after: 2 weeks
Diffstat (limited to 'share/dtrace/nfsattrstats')
-rwxr-xr-x | share/dtrace/nfsattrstats | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/share/dtrace/nfsattrstats b/share/dtrace/nfsattrstats new file mode 100755 index 0000000..364a39a --- /dev/null +++ b/share/dtrace/nfsattrstats @@ -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); +} +' |