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 * $FreeBSD$ 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#pragma D option quiet 44 45dtrace:::BEGIN 46{ 47 printf("Collecting data...press Ctrl-C to exit.\n"); 48} 49 50syscall:::entry 51{ 52 53 self->count = 0; 54} 55 56nfsclient:nfs3::start 57{ 58 59 self->timestamp = timestamp; 60} 61 62nfsclient:nfs3::done 63{ 64 65 self->count += (timestamp - self->timestamp); 66} 67 68syscall:::return 69/self->count != 0/ { 70 71 @syscalls[probefunc] = quantize(self->count); 72} 73