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From: Archie Cobbs <archie@whistle.com>
Message-Id: <199711071621.IAA15074@bubba.whistle.com>
Subject: Re: Quantum size?
In-Reply-To: <Pine.BSF.3.96.971106201126.592A-100000@jandrese.async.vt.edu> from Jason Andresen at "Nov 6, 97 08:12:47 pm"
To: jandrese@vt.edu (Jason Andresen)
Date: Fri, 7 Nov 1997 08:21:44 -0800 (PST)
Cc: freebsd-hackers@FreeBSD.ORG
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Jason Andresen writes:
> On Thu, 6 Nov 1997, Doug Ambrisko wrote:
> 
> ~~| 	I would like to know the quantum size of FreeBSD2.2.2.
> ~~
> ~~I'm not sure when the change went in ... but it can be whatever you want 
> ~~(just not 0).  Default is 10ms.  We change it to make FreeBSD run more 
> ~~"batch-like".
> ~~
> ~~% sysctl kern.quantum
> ~~kern.quantum: 10
> ~~% 
> Not in 2.2.2-RELEASE
> 
> %(2_~): uname -a
> FreeBSD jandrese.async.vt.edu 2.2.2-RELEASE FreeBSD 2.2.2-RELEASE #0: Fri
> Oct 10 17:00:31 EDT 1997
> jandrese@jandrese.async.vt.edu:/usr/src/sys/compile/NESSUS  i386
> %(3_~): sysctl kern.quantum
> sysctl: Unknown oid 'kern.quantum'
> %1 (4_~): 

It's in 2.2.5 but not 2.2.2:

>   RCS file: /cvs/freebsd/src/sys/kern/kern_synch.c,v
>   Working file: kern_synch.c
>   head: 1.39
>   symbolic names:
> 	  RELENG_2_2_5_RELEASE: 1.26.2.4
> 	  RELENG_2_2_2_RELEASE: 1.26.2.1
> 
>   revision 1.26.2.2
>   date: 1997/08/08 23:42:56;  author: julian;  state: Exp;  lines: +26 -2
>   MFC: match rev 1.33
>   Reviewed by:    john Dyson (dyson@freebsd.org)
>   Obtained from:  Whistle Communications production build
> 
>   Make the scheduling quantum tunable..
>   Useful for BATCH oriented systems (e.g. web servers and ftp servers etc)
>   that do not do interactive work.

-Archie

___________________________________________________________________________
Archie Cobbs   *   Whistle Communications, Inc.  *   http://www.whistle.com