nfsattrstats revision 256281 
1#!/bin/sh
2#
3# Copyright (c) 2012 Robert N. M. Watson
4# All rights reserved.
5#
6# This software was developed at the University of Cambridge Computer
7# Laboratory with support from a grant from Google, Inc.
8#
9# Redistribution and use in source and binary forms, with or without
10# modification, are permitted provided that the following conditions
11# are met:
12# 1. Redistributions of source code must retain the above copyright
13#    notice, this list of conditions and the following disclaimer.
14# 2. Redistributions in binary form must reproduce the above copyright
15#    notice, this list of conditions and the following disclaimer in the
16#    documentation and/or other materials provided with the distribution.
17#
18# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28# SUCH DAMAGE.
29#
30# $FreeBSD: stable/10/share/dtrace/nfsattrstats 238535 2012-07-16 17:48:43Z gnn $
31#
32# This script creates a trace of NFS RPCs, NFS attribute cache
33# activity, and NFS access cache activity, along with the system call
34# that instigated the activity. Notice that NFS events may happen
35# outside of the context of a system call, most likely due to the VM
36# system paging from NFS, in which case the system call name is
37# reported as "-"
38
39/usr/sbin/dtrace -n '
40#pragma D option quiet
41
42dtrace:::BEGIN
43{
44	printf("probe\targ0\texecutable\tsyscall\n");
45}
46
47syscall:::entry
48{
49
50        self->syscallname = probefunc;
51}
52
53syscall:::return
54{
55
56        self->syscallname = "";
57}
58
59nfsclient:::
60/self->syscallname != 0 && self->syscallname != ""/
61{
62
63    printf("%s\t%s\t%s\t%s\n", probemod, stringof(arg0), execname, 
64	    self->syscallname);
65}
66
67nfsclient:::
68/self->syscallname == 0 || self->syscallname == ""/
69{
70
71    printf("%s\t%s\t%s\t%s\n", probemod, stringof(arg0), execname, 
72	    self->syscallname);
73}
74'
75