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Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!b-tech!zeeff
From: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Newsgroups: comp.arch,comp.unix.i386,comp.unix.xenix
Subject: Re: Simple disk benchmark results
Message-ID: <9477@b-tech.ann-arbor.mi.us>
Date: 22 Jun 89 22:38:07 GMT
References: <9468@b-tech.ann-arbor.mi.us> <9472@b-tech.ann-arbor.mi.us> <450@ssp2.idca.tds.philips.nl>
Reply-To: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Organization: Branch Technology Ann Arbor, MI
Lines: 20

>>>Test results from*:
>>>
>>>/bin/time dd if=/dev/disk_block_device  of=/dev/null bs=4k count=2000
>>>

>Why not use /dev/raw_disk_device as well to exclude the cache buffering
>in the system?
>

The intent is a very simple benchmark to measure something as close as 
possible to file system performance without introducing variables like 
fragmentation.  Since normal disk i/o does go through the block device 
and the cache ....  


*unloaded systems using real times

-- 
  Jon Zeeff			zeeff@b-tech.ann-arbor.mi.us
  Ann Arbor, MI			sharkey!b-tech!zeeff