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# Report values growing in 10 consecuitive samples 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 # vmstat -m 54 55 # Type InUse MemUse HighUse Requests Size(s) 56 # DEVFS3 168 21K - 169 128 57 # DEVFS1 157 40K - 157 256 58 # DEVFS 12 1K - 13 16,128 59 vmstat -m | \ 60 sed '1,1d;s/K .*//;s/ [0-9][0-9]* //;s/ */ /g;s/^ *//;s/ /_/g;s/_\([0-9][0-9]*$\)/ \1/' | \ 61 awk '{printf "vmstat -m %s, %d\n", $1, $2}' 62 63 # Check for leaks in mbufs 64 65# $ netstat -m 66# 1233/597/1830 mbufs in use (current/cache/total) 67# 1232/196/1428/8896 mbuf clusters in use (current/cache/total/max) 68# 1232/74 mbuf+clusters out of packet secondary zone in use (current/cache) 69# 0/0/0/0 4k (page size) jumbo clusters in use (current/cache/total/max) 70# 0/0/0/0 9k jumbo clusters in use (current/cache/total/max) 71# 0/0/0/0 16k jumbo clusters in use (current/cache/total/max) 72# 2772K/541K/3313K bytes allocated to network (current/cache/total) 73# 508/7778/5734 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 74# 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 75# 0/6/2480 sfbufs in use (current/peak/max) 76# 0 requests for sfbufs denied 77# 0 requests for sfbufs delayed 78# 0 requests for I/O initiated by sendfile 79# 251 calls to protocol drain routines 80 81 82 netstat -m | head -10 | sed 's#/# #g;s/k / /;s/K / /' | awk ' 83/mbufs / {mbufs=$1}; 84/ clusters/ {clusters=$2}; 85/sfbufs in use/ {sfbufs=$3}; 86/allocated/ {allocated=$1} 87END { 88 print "mbufs,", mbufs; 89 print "clusters,", clusters; 90 print "sfbufs,", sfbufs; 91 print "allocatedToNetwork,", allocated; 92} 93' 94 sysctl vm.kvm_free | tail -1 | sed 's/:/,/' 95 sleep 10 96done | awk -F, ' 97{ 98# Pairs of "name, value" are passed to this awk script 99 name=$1; 100 size=$2; 101# print "name, size :", name, size; 102 if (NF != 2) 103 print "Number of fields for ", name, "is ", NF; 104 if (size > s[name]) { 105 n[name]++; 106 if (n[name] > 10) { 107 cmd="date '+%T'"; 108 cmd | getline t; 109 close(cmd); 110 printf "%s \"%s\" may be leaking, size %d\n", t, name, size; 111 n[name] = 0; 112 } 113 s[name] = size; 114 } else { 115 if (n[name] > 0) 116 n[name]--; 117 } 118}' 119