Date: Thu, 22 May 2003 07:46:08 +1000 (EST) From: Andy Farkas <andyf@speednet.com.au> To: Paul Hamilton <paul@computerwest.com.au> Cc: Freebsd-Questions <freebsd-questions@freebsd.org> Subject: Re: 'top' showing high interrupt rate Message-ID: <20030522074024.B93323-100000@hewey.af.speednet.com.au> In-Reply-To: <AGEHIFHGNEMPFNCPLONMOEFPEKAA.paul@compwest.com.au>
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On Wed, 21 May 2003, Paul Hamilton wrote:
> I noticed that top shows a rather high interrupt rate, usually hovering
> around 60%! Here is a sample:-
Try `top -S` instead. This will show system processes as well. Also, use
`systat -v` as previously mentioned to see interrupt counts.
> 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
Zombies not good.
> 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<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MMX>
> 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?
My guess is this box is a gateway/firewall and may be getting pounded on
the network interfaces. Are you running ipfw as well?
--
:{ andyf@speednet.com.au
Andy Farkas
System Administrator
Speednet Communications
http://www.speednet.com.au/
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