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