Date: Thu, 20 Aug 1998 10:49:18 -0400 (EDT) From: Aaron Grosky <agrosky@wgate.com> To: Lars =?iso-8859-1?Q?K=F6ller?= <Lars.Koeller@post.uni-bielefeld.de> Cc: Terry Lambert <tlambert@primenet.com>, chuckr@glue.umd.edu, freebsd-smp@FreeBSD.ORG Subject: Re: Per processor load? Message-ID: <Pine.BSF.3.96.980820101759.7747Z-100000@dadu.eng.tvol.net> In-Reply-To: <199808190540.FAA24476@mitch.hrz.uni-bielefeld.de>
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Hello Lars, Terry, ... I spent many years working with Cray's SMP UNICOS. On Wed, 19 Aug 1998, Lars [iso-8859-1] Köller wrote: > Hello Terry! > > First of all thanks for the large answer! > > In reply to Terry Lambert who wrote: > >>> ... >>> System: share Tue Aug 18 07:30:58 1998 >>> Load averages: 2.42, 2.29, 2.28 >>> 280 processes: 273 sleeping, 5 running, 2 zombies >>> Cpu states: >>> CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS >>> 0 2.62 0.4% 97.6% 2.0% 0.0% 0.0% 0.0% 0.0% 0.0% >>> 1 2.22 0.8% 97.0% 2.2% 0.0% 0.0% 0.0% 0.0% 0.0% >>> --- ---- ----- ----- ----- ----- ----- ----- ----- ----- >>> avg 2.42 0.6% 97.2% 2.2% 0.0% 0.0% 0.0% 0.0% 0.0% > > Sorry, I forgot to mention this top was running on HPUX 10.20. > >> This basically implies a scheduler artifact; each CPU must have its >> own ready-to-run queue for you to get this statistic; ... A process which is not multi-threaded can only be runnable on one processor at a time. Therefore, given a mix of simple processes (not threaded) and threaded processes running on only one processor: the above example shows, as one possibility, processor 0 running a simple process for the previous load interval while processor 1 ran a simple process 60% of that time and a multi-threaded process 40% of the time. > ... > > Thanks again and best wishes > > Lars Aaron Aaron Grosky agrosky@wgate.com WorldGate Communications "Internet TV Over Cable" 3220 Tillman Drive 215-633-5125 Bensalem, PA 19020 215-633-9590 (FAX) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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