Date: Thu, 16 May 1996 16:47:46 +0600 (ESD) From: "Serge A. Babkin" <babkin@hq.icb.chel.su> To: narvi@haldjas.folklore.ee (Narvi) Cc: hackers@freebsd.org Subject: Re: EDO & Memory latency Message-ID: <199605161047.QAA13555@hq.icb.chel.su> In-Reply-To: <Pine.BSF.3.91.960516130639.25743B-100000@haldjas.folklore.ee> from "Narvi" at May 16, 96 01:19:46 pm
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> > > On Thu, 16 May 1996, Serge A. Babkin wrote: > > > I have just tried lmbench and the numbers it gives are looking > > slightly strange for me. It shows memory latency upto 500ns while > > I have 60-ns EDO memory in a Pentium/75 box. Okay, its external > > clock is 25MHz, this gives 40ns, one wait state, it gives another 40ns, > > it gives 80ns, but why the overhead is over 400ns ? > > The external bus of the Pentium 75 should be 50Mhz. It is 1.5x50, not You're right, I was wrong. So, the guestion gets yet more interesting :-) > 3x25. 60ns EDO sounds like an overkill for a Pentium 75 though... > I would use a quicker processor and (120) with ordinary memory > (fast-page, 70ns) - but the likes may vary. I just got them for the same price as ordinary memory and of course I choosed EDO. It costed me $125 per 8M SIMM. -SB
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