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# $FreeBSD$
31#
32# This script measures all time spent waiting on RPC replies for each
33# system call, and then generates a histogram of those times sorted by
34# system call name.
35#
36# Currently only supports NFSv3
37#
38# Usage: nfsclienttime
39#
40# Press Ctrl-C to exit and display statistics.
41#
42
43/usr/sbin/dtrace -n '
44#pragma D option quiet
45
46dtrace:::BEGIN
47{
48	printf("Collecting data...press Ctrl-C to exit.\n");
49}
50
51syscall:::entry
52{
53
54        self->count = 0;
55}
56
57nfsclient:nfs3::start
58{
59
60        self->timestamp = timestamp;
61}
62
63nfsclient:nfs3::done
64{
65
66        self->count += (timestamp - self->timestamp);
67}
68
69syscall:::return
70/self->count != 0/  {
71
72        @syscalls[probefunc] = quantize(self->count);
73}
74'
75