From owner-freebsd-current Sat Apr 8 22:28:02 1995 Return-Path: current-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id WAA02531 for current-outgoing; Sat, 8 Apr 1995 22:28:02 -0700 Received: from gndrsh.aac.dev.com (gndrsh.aac.dev.com [198.145.92.241]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id WAA02525 for ; Sat, 8 Apr 1995 22:27:57 -0700 Received: (from rgrimes@localhost) by gndrsh.aac.dev.com (8.6.8/8.6.6) id WAA17109; Sat, 8 Apr 1995 22:27:36 -0700 From: "Rodney W. Grimes" Message-Id: <199504090527.WAA17109@gndrsh.aac.dev.com> Subject: Re: Disk performance To: pete@pelican.com (Pete Carah) Date: Sat, 8 Apr 1995 22:27:36 -0700 (PDT) Cc: current@FreeBSD.org In-Reply-To: from "Pete Carah" at Apr 8, 95 09:47:00 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Content-Length: 1188 Sender: current-owner@FreeBSD.org Precedence: bulk ... > RG I expect to be able towards the end of next week show some really > RG amazing numbers on a Pentium system with respect to memory speeds. > RG Let's all hope that the new EDO and Pipelined Burst SRAM stand up > RG to the theories and we start to see 100++MB/sec main memory speeds on > RG a Pentium like we should. > > Agreed... Looking forward to it. PCI specs are pretty good but PC > motherboards have never been very good in the memory interface dept. > > Is the idea of EDO that you hit RAS for the next cycle while the out > data is still current? Bank interleave probably helps more for cheaper, > if you have/need enough memory. Eeek. Here I go back to my old > mainframe days :-) I have not been able to find much technical data on exactly how the EDO simms work. I do know that it is suppose to eliminate the RAS precharge time between access cycles, and still support the equivilent of fast page mode accesses. I need to go dig in the magazines and see if I can find some more indepth articles on EDO. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD