1#!/usr/sbin/dtrace -s 2/* 3 * Copyright (c) 2012 George V. Neville-Neil 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * The hotopen D script periodically outputs table of which UIDs 28 * are opening files. This is a very quick way to find out if 29 * a paritcular user is thrashing a system with rapid calls to 30 * open/close. 31 * 32 * Usage: hotopen 33 */ 34 35#pragma D option quiet 36BEGIN 37{ 38 printf("Files opened per UID in the last second.\n"); 39} 40 41syscall::open:entry 42{ 43 @files[uid] = count(); 44 output = 1; 45} 46 47tick-1sec 48/output != 0/ 49{ 50 printf("%-20Y \n", walltimestamp); 51 printa("uid %d\tcount %@d\n", @files, @files); 52 trunc(@files); 53 output = 0; 54} 55