From owner-freebsd-current Sat Apr 8 03:06:31 1995 Return-Path: current-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id DAA09320 for current-outgoing; Sat, 8 Apr 1995 03:06:31 -0700 Received: from inet-gw-1.pa.dec.com (inet-gw-1.pa.dec.com [16.1.0.22]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id DAA09311 for ; Sat, 8 Apr 1995 03:06:26 -0700 Received: from rks32.pcs.dec.com by inet-gw-1.pa.dec.com (5.65/24Feb95) id AA12671; Sat, 8 Apr 95 03:03:54 -0700 Received: by rks32.pcs.dec.com (Smail3.1.27.1 #16) id m0rxXKc-0005OqC; Sat, 8 Apr 95 12:01 MSZ Message-Id: Date: Sat, 8 Apr 95 12:01 MSZ From: garyj@rks32.pcs.dec.com (Gary Jennejohn) To: current%freebsd.org@inet-gw-1.pa.dec.com Subject: Re: Disk performance Sender: current-owner@FreeBSD.org Precedence: bulk This is actually more about MB performance. Rodney Grimes wrote: >> I expect to be able towards the end of next week show some really >> amazing numbers on a Pentium system with respect to memory speeds. >> Let's all hope that the new EDO and Pipelined Burst SRAM stand up >> to the theories and we start to see 100++MB/sec main memory speeds on >> a Pentium like we should. c't magazine ran a series of tests on the latest crop of PCI MBs lately. Here are some of the results: ASUS PCI/I-P54TP4 (Triton chipset) with 256kB burst SRAM and 16 MB EDO main mem. 1st level cache: 407 MB/sec 2nd level cache: 65 MB/sec Main mem: 39 MB/sec The same MB without 2nd level cache but 16 MB EDO main mem. 1st level cache: 391 MB/sec 2nd level cache: N/A Main mem: 44 MB/sec This board is actually faster w/o the 2nd level cache when EDO RAM is used ! This was the fastet of all (6) configurations tested. The memmory transfer speeds were tested using some DOS utility developed by c't. Performance might look different under FBSD. They tested a whole slew of other things (SCSI, tranfers to a graphics card, etc.), but it's too much to copy. There's still a ways to go to achieve 100++MB/sec to main mem. Gary J.