1238660Sgnn#!/bin/sh 2238660Sgnn# 3238660Sgnn# Copyright (c) 2012 George V. Neville-Neil 4238660Sgnn# All rights reserved. 5238660Sgnn# 6238660Sgnn# Redistribution and use in source and binary forms, with or without 7238660Sgnn# modification, are permitted provided that the following conditions 8238660Sgnn# are met: 9238660Sgnn# 1. Redistributions of source code must retain the above copyright 10238660Sgnn# notice, this list of conditions and the following disclaimer. 11238660Sgnn# 2. Redistributions in binary form must reproduce the above copyright 12238660Sgnn# notice, this list of conditions and the following disclaimer in the 13238660Sgnn# documentation and/or other materials provided with the distribution. 14238660Sgnn# 15238660Sgnn# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16238660Sgnn# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17238660Sgnn# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18238660Sgnn# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19238660Sgnn# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20238660Sgnn# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21238660Sgnn# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22238660Sgnn# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23238660Sgnn# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24238660Sgnn# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25238660Sgnn# SUCH DAMAGE. 26238660Sgnn# 27238660Sgnn# $FreeBSD: releng/10.2/share/dtrace/hotopen 238665 2012-07-21 07:14:52Z gnn $ 28238660Sgnn# 29238660Sgnn# The hotopen D script periodically outputs table of which UIDs 30238660Sgnn# are opening files. This is a very quick way to find out if 31238660Sgnn# a paritcular user is thrashing a system with rapid calls to 32238660Sgnn# open/close. 33238660Sgnn# 34238660Sgnn# Usage: hotopen 35238660Sgnn# 36238660Sgnn 37238660Sgnn/usr/sbin/dtrace -n ' 38238660Sgnn#pragma D option quiet 39238660SgnnBEGIN 40238660Sgnn{ 41238660Sgnn printf("Files opened per UID in the last second.\n"); 42238660Sgnn} 43238660Sgnn 44238660Sgnnsyscall::open:entry 45238660Sgnn{ 46238660Sgnn @files[uid] = count(); 47238660Sgnn output = 1; 48238660Sgnn} 49238660Sgnn 50238660Sgnntick-1sec 51238660Sgnn/output != 0/ 52238660Sgnn{ 53238660Sgnn printf("%-20Y \n", walltimestamp); 54238660Sgnn printa("uid %d\tcount %@d\n", @files, @files); 55238660Sgnn trunc(@files); 56238660Sgnn output = 0; 57238660Sgnn} 58238660Sgnn' 59