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 Message-ID: <m0rxXKc-0005OqC@rks32.pcs.dec.com>
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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.
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