From owner-freebsd-questions@FreeBSD.ORG Wed May 21 07:38:35 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A5CB937B401 for ; Wed, 21 May 2003 07:38:35 -0700 (PDT) Received: from cwe.compwest.com.au (compwest.com.au [202.72.147.44]) by mx1.FreeBSD.org (Postfix) with ESMTP id E788A43F75 for ; Wed, 21 May 2003 07:38:33 -0700 (PDT) (envelope-from paul@compwest.com.au) Received: from wks (ant.parkview.compwest.com.au [202.72.147.43]) by cwe.compwest.com.au (8.12.6/8.11.6) with SMTP id h4LEbYNc095116 for ; Wed, 21 May 2003 22:38:18 +0800 (WST) (envelope-from paul@compwest.com.au) From: "Paul Hamilton" To: "Freebsd-Questions" Date: Wed, 21 May 2003 22:38:18 +0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Subject: 'top' showing high interrupt rate X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 May 2003 14:38:36 -0000 X-List-Received-Date: Wed, 21 May 2003 14:38:36 -0000 Hi, I noticed that top shows a rather high interrupt rate, usually hovering around 60%! Here is a sample:- last pid: 2879; load averages: 0.34, 0.24, 0.18 up 1+17:26:56 17:18:10 36 processes: 2 running, 33 sleeping, 1 zombie CPU states: 0.6% user, 0.0% nice, 0.0% system, 59.8% interrupt, 39.6% idle Mem: 11M Active, 5072K Inact, 7988K Wired, 3552K Cache, 6480K Buf, 960K Free Swap: 128M Total, 4608K Used, 123M Free, 3% Inuse PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND 135 root 10 0 980K 528K nanslp 11:38 0.00% 0.00% cron 201 root 2 0 2824K 1132K select 3:46 0.00% 0.00% ppp 108 root 2 0 452K 208K select 0:29 0.00% 0.00% natd 127 root 2 0 2760K 1704K select 0:14 0.00% 0.00% named 223 root 2 0 2068K 908K select 0:10 0.00% 0.00% sshd 212 root 2 0 2044K 876K select 0:10 0.00% 0.00% sshd pstat -T says: 120/1064 files 4M/127M swap space vmstat 10 says: procs memory page disks faults cpu r b w avm fre flt re pi po fr sr ad0 ad1 in sy cs us sy id 0 0 0 12992 4992 1 0 0 0 1 0 0 0 237 52 8 0 59 41 0 0 0 9404 4992 1 0 0 0 0 0 0 0 229 35 6 0 60 40 0 0 0 15572 4868 16 0 0 0 7 0 0 0 231 938 10 1 61 38 0 0 0 17820 4868 8 0 0 0 0 0 1 0 230 45 8 0 60 40 0 0 0 12492 5224 8 0 0 0 9 0 0 0 231 47 8 1 60 39 dmesg says: Copyright (c) 1992-2000 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 4.2-RELEASE #1: Tue Feb 13 22:51:23 WST 2001 root@ant.compwest.net.au:/usr/src/sys/compile/ANT Timecounter "i8254" frequency 1193182 Hz CPU: Pentium/P55C (165.79-MHz 586-class CPU) Origin = "GenuineIntel" Id = 0x544 Stepping = 4 Features=0x8001bf real memory = 33554432 (32768K bytes) avail memory = 29478912 (28788K bytes) Yes, the server only has 32MB or RAM, however, it's only using 4MB of VM. Anyone have any idea how to troubleshoot further? How can I isolate what is causing the rather high interrupt rate? Cheers, Paul Hamilton