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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.mel.connect.com.au!news.mel.aone.net.au!grumpy.fl.net.au!news.webspan.net!newsfeeds.sol.net!newspump.sol.net!howland.erols.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!192.70.231.3!spstimes.sps.mot.com!newsdist.sps.mot.com!risc.sps.mot.com!ibmoto.com!news From: Skipper Smith <skipper@ibmoto.com> Newsgroups: comp.unix.bsd.freebsd.misc,comp.arch,comp.benchmarks,comp.sys.super Subject: Re: benchmarking discussion at Usenix? Date: Thu, 16 Jan 1997 14:45:03 -0500 Organization: IBM/Motorola Somerset Design Center Lines: 19 Distribution: inet Message-ID: <32DE853F.31DF@ibmoto.com> References: <5am7vo$gvk@fido.asd.sgi.com> <32D3EE7E.794B@nas.nasa.gov> <32D53CB1.41C6@mti.sgi.com> <32DAD735.59E2@nas.nasa.gov> <32DE751E.3F54@ibmoto.com> NNTP-Posting-Host: tigerlily.ibmoto.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 2.01 (X11; I; AIX 2) Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:34134 comp.arch:62472 comp.benchmarks:18913 comp.sys.super:6865 Skipper Smith wrote: [...] > I don't have any hard numbers, but the industry seems to have decided > that cache sector sizes equal to 4 or 8 data beats (with the bulk > choosing 4... 8 is usually an available choice or a side effect) is best > and that, when organizational purposes require it, multiple sectors per > block are acceptable but are generally avoided. Therefore, you need to > see your bus width as to what the "line" size should be. Oh, all of that was applying to on-chip caches. When going to external caches, one needs to look very carefully at the kinds of programs that are expected to run before making any real decisions. Going with a generic choice could be a real performance killer in many specific cases. -- Skipper Smith Somerset Design Center All opinions are my own and not those of my employer