1#!/bin/sh 2 3# 4# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28# $FreeBSD$ 29# 30 31# Script to catch possible leaks in vm, malloc and mbufs 32 33i=0 34while true; do 35 sysctl vm.kvm_free | tail -1 | sed 's/:/,/' 36 vmstat -z | grep VNODE: | awk '{print $1 "," $4}' | sed 's/,$//' 37 sleep 1 38done | awk -F, ' 39{ 40# Pairs of "name, value" are passed to this awk script 41 name=$1 42 size=$2 43 if (NF != 2) 44 print "Number of fields for ", name, "is ", NF 45 if (size == s[name]) 46 next; 47# print "name, size, old minimum :", name, size, s[name] 48 49 if ((size < s[name]) || (f[name] == 0)) { 50# print "Initial value / new minimum", n[name], s[name], size 51 n[name] = 0 52 s[name] = size 53 f[name] = 1 54 } 55 56 if (++n[name] > 120) { 57 cmd="date '+%T'" 58 cmd | getline t 59 close(cmd) 60 if (++w[name] > 10) 61 printf "%s \"%s\" may be leaking, size %d\n", t, name, size 62 n[name] = 0 63 s[name] = size 64 } 65}' 66