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# This version looks for increse in minimum values 33 34i=0 35while true; do 36 # Check for leaks in vm.zone 37 38# ITEM SIZE LIMIT USED FREE REQUESTS 39# 40# UMA Kegs: 140, 0, 66, 6, 66 41# UMA Zones: 120, 0, 66, 24, 66 42 43 44 vmstat -z | sed '1,3d;s/://g' | \ 45 sed 's/ */ /g;s/\([0-9]\) *\([0-9]\)/\1,\2/g;s/ \([0-9]\)/,\1/;s/^ *//' | \ 46 awk -F, ' 47/^..*$/{ 48 gsub("^ *", "", $1); 49 size=$4; 50 printf "vmstat -z %s,%s\n", $1, size; 51} 52' 53 # Check for leaks in mbufs 54 55# $ netstat -m 56# 1233/597/1830 mbufs in use (current/cache/total) 57# 1232/196/1428/8896 mbuf clusters in use (current/cache/total/max) 58# 1232/74 mbuf+clusters out of packet secondary zone in use (current/cache) 59# 0/0/0/0 4k (page size) jumbo clusters in use (current/cache/total/max) 60# 0/0/0/0 9k jumbo clusters in use (current/cache/total/max) 61# 0/0/0/0 16k jumbo clusters in use (current/cache/total/max) 62# 2772K/541K/3313K bytes allocated to network (current/cache/total) 63# 508/7778/5734 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 64# 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 65# 0/6/2480 sfbufs in use (current/peak/max) 66# 0 requests for sfbufs denied 67# 0 requests for sfbufs delayed 68# 0 requests for I/O initiated by sendfile 69# 251 calls to protocol drain routines 70 71 72 netstat -m | head -10 | sed 's#/# #g;s/k / /;s/K / /' | awk ' 73/mbufs / {mbufs=$1}; 74/ clusters/ {clusters=$2}; 75/sfbufs in use/ {sfbufs=$3}; 76/allocated/ {allocated=$1} 77END { 78 print "mbufs,", mbufs; 79 print "clusters,", clusters; 80 print "sfbufs,", sfbufs; 81 print "allocatedToNetwork,", allocated; 82} 83' 84# sysctl vm.kvm_free | tail -1 | sed 's/:/,/' # Need used here! 85 sleep 1 86done | awk -F, ' 87{ 88# Pairs of "name, value" are passed to this awk script 89 name=$1 90 size=$2 91 if (NF != 2) 92 print "Number of fields for ", name, "is ", NF 93 if (size == s[name]) 94 next; 95# print "name, size, old minimum :", name, size, s[name] 96 97 if ((size - 10 < s[name]) || (f[name] == 0)) { 98# print "Initial value / new minimum", n[name], s[name], size 99 n[name] = 0 100 if (f[name] == 0) 101 f[name] = 1 102 if (f[name] != 2) 103 s[name] = size 104 } 105 106 if (++n[name] > 120) { 107 cmd="date '+%T'" 108 cmd | getline t 109 close(cmd) 110# if (++w[name] > 4) { 111 printf "%s \"%s\" may be leaking, size %d\n", t, name, size 112 f[name] = 2 113# } 114 n[name] = 0 115 s[name] = size 116 } 117}' 118