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Date:      Sun, 19 Mar 1995 00:19:40 -0800 (PST)
From:      "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com>
To:        phk@ref.tfs.com (Poul-Henning Kamp)
Cc:        nate@sneezy.sri.com, hackers@FreeBSD.org, core@FreeBSD.org
Subject:   Re: NMI Error success story
Message-ID:  <199503190819.AAA22929@gndrsh.aac.dev.com>
In-Reply-To: <199503190806.AAA22675@ref.tfs.com> from "Poul-Henning Kamp" at Mar 19, 95 00:06:58 am

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> 
> > Humm.. 3+1+1+1 = 6, 3+2+2+2=9, should have been 30% faster if everything
> > hit the cache, figure an actual cache hit rate of 80% and you should have
> > seen a 24% performance increase by this.
> 
> Well, 10% is what I saw on "make world"...

We must be missing the cache a lot more than I figured on.  Time for me
to go stick some Pentium counter code in, wish that I had some way to
easily watch the external cache hit rate... let me see, I need 2
>60Mhz counters, and the data books on the SIS 82C50X or Opti 597
chip sets.  Wonder how many digits I need for make world :-) :-)


-- 
Rod Grimes                                      rgrimes@gndrsh.aac.dev.com
Accurate Automation Company                   Custom computers for FreeBSD



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