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 29# Script to catch possible leaks in vm, malloc and mbufs 30# Report values growing in 10 consecuitive samples 31 32i=0 33while true; do 34 # Check for leaks in vm.zone 35 36# ITEM SIZE LIMIT USED FREE REQUESTS 37# 38# UMA Kegs: 140, 0, 66, 6, 66 39# UMA Zones: 120, 0, 66, 24, 66 40 41 vmstat -z | sed '1,3d;s/://g' | \ 42 sed 's/ */ /g;s/\([0-9]\) *\([0-9]\)/\1,\2/g;s/ \([0-9]\)/,\1/;s/^ *//' | \ 43 awk -F, ' 44/^..*$/{ 45 gsub("^ *", "", $1); 46 size=$4; 47 printf "vmstat -z %s,%s\n", $1, size; 48} 49' 50 # vmstat -m 51 52 # Type InUse MemUse HighUse Requests Size(s) 53 # DEVFS3 168 21K - 169 128 54 # DEVFS1 157 40K - 157 256 55 # DEVFS 12 1K - 13 16,128 56 vmstat -m | \ 57 sed '1,1d;s/K .*//;s/ [0-9][0-9]* / /;s/ */ /g;s/^ *//;s/ /_/g;s/_\([0-9][0-9]*$\)/ \1/' | \ 58 awk '{printf "vmstat -m %s, %d\n", $1, $2}' 59 60 # Check for leaks in mbufs 61 62# $ netstat -m 63# 1233/597/1830 mbufs in use (current/cache/total) 64# 1232/196/1428/8896 mbuf clusters in use (current/cache/total/max) 65# 1232/74 mbuf+clusters out of packet secondary zone in use (current/cache) 66# 0/0/0/0 4k (page size) jumbo clusters in use (current/cache/total/max) 67# 0/0/0/0 9k jumbo clusters in use (current/cache/total/max) 68# 0/0/0/0 16k jumbo clusters in use (current/cache/total/max) 69# 2772K/541K/3313K bytes allocated to network (current/cache/total) 70# 508/7778/5734 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 71# 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 72# 0/6/2480 sfbufs in use (current/peak/max) 73# 0 requests for sfbufs denied 74# 0 requests for sfbufs delayed 75# 0 requests for I/O initiated by sendfile 76# 251 calls to protocol drain routines 77 78 netstat -m | head -10 | sed 's#/# #g;s/k / /;s/K / /' | awk ' 79/mbufs / {mbufs=$1}; 80/ clusters/ {clusters=$2}; 81/sfbufs in use/ {sfbufs=$3}; 82/allocated/ {allocated=$1} 83END { 84 print "mbufs,", mbufs; 85 print "clusters,", clusters; 86 print "sfbufs,", sfbufs; 87 print "allocatedToNetwork,", allocated; 88} 89' 90 sysctl vm.kvm_free | tail -1 | sed 's/:/,/' 91 sysctl vm.swap_reserved | tail -1 | sed 's/:/,/' 92 sleep 10 93done | awk -F, ' 94{ 95# Pairs of "name, value" are passed to this awk script 96 name=$1; 97 size=$2; 98# print "name, size :", name, size; 99 if (NF != 2) 100 print "Number of fields for ", name, "is ", NF; 101 if (size > s[name]) { 102 n[name]++; 103 if (n[name] > 50) { 104 cmd="date '+%T'"; 105 cmd | getline t; 106 close(cmd); 107 printf "%s \"%s\" may be leaking, used %d\r\n", t, name, size; 108 n[name] = 0; 109 } 110 s[name] = size; 111 } 112}' 113