Date: Fri, 31 Dec 1999 17:46:48 -0800 From: Kent Stewart <kstewart@3-cities.com> To: R Joseph Wright <rjoseph@nwlink.com> Cc: freebsd-questions@FreeBSD.org Subject: Re: some performance issues Message-ID: <386D5C88.B8257D45@3-cities.com> References: <386C023E.680FC31@inna.net> <386C0676.F39EC477@3-cities.com> <386C2354.ABD1ED54@nwlink.com> <386C3173.1D695393@3-cities.com> <386C543D.6E59C9DF@nwlink.com> <19991231104441.C2609@emu.sourcee.com> <386CE8AB.29A140B5@nwlink.com> <386CF9DC.B71A9887@3-cities.com> <386D3D3C.C92D02A3@nwlink.com>
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R Joseph Wright wrote: > > Kent Stewart wrote: > > > > You really should print a copy of the LINT file and look at it while > > you are reading this stuff. The ff tells the system to try and read > > ahead 15 sectors. You add all of this together and you can easily > > speed up your disk access 4x or more. > > > > Kent > > > > R Joseph Wright wrote: > > > > > > "Norman C. Rice" wrote: > > > > > > > > On Thu, Dec 30, 1999 at 10:59:09PM -0800, R Joseph Wright wrote: > > > > > > > > > > > > > > > > > The 0x2000 allows IDE DMA transfers and that could be part of your > > > > > > problem. Some drives like that setting and some systems don't. It is > > > > > > something that you can try by seting it at boot time. If it works, > > > > > > then you build it into your kernel. My drives are all 0xa0ffa0ff. > > > > > > 8+2=a. > > > > > > > I recompiled my kernel and changed the flags from 0x80ff80ff to > 0xa0ffa0ff. What is a good program to use to see if I can really tell a > difference? I tried out some of my bigger programs like star office and > gimp. Star Office still took a little while to load, gimp seemed to fly > (when it wasn't crashing). I use "iozone -s 160m" because I have 128MB of memory. The size of the file needs to be larger than memory so you aren't benchmarking the cache. You can find it in the packages/benchmark area of the CDROM. Kent > > Thanks a lot for all the help. I'm starting to understand the > hexadecimal thing a bit more now. The bitwise expansion from 0 to hex f is something you just have to know. > > Joseph > -- > You will do foolish things, > but do them with enthusiasm. Colette. -- Kent Stewart Richland, WA mailto:kstewart@3-cities.com http://www.3-cities.com/~kstewart/index.html FreeBSD News http://daily.daemonnews.org/ SETI(Search for Extraterrestrial Intelligence) @ HOME http://setiathome.ssl.berkeley.edu/ Hunting Archibald Stewart, b 1802 in Ballymena, Antrim Co., NIR http://www.3-cities.com/~kstewart/genealogy/archibald_stewart.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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