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