Cached file read performance with 6.2-PRERELEASE
Mark Kirkwood
markir at paradise.net.nz
Wed Dec 20 01:37:41 PST 2006
JoaoBR wrote:
> On Tuesday 19 December 2006 22:05, Mark Kirkwood wrote:
>> $ dd of=/dev/null if=/tmp/file bs=32k # read it
>> 819200000 bytes transferred in 1.801944 secs (454620117 bytes/sec)
>>
>
>
> hum, look my releng_6:
> # dd of=/dev/null if=/c/c1/file bs=32k
> 819200000 bytes transferred in 0.896507 secs (913768635 bytes/sec)
>
Hmm - so your machine reads memory twice as fast as mine, which is
great! but I'm not sure it actually shows anything useful ... let me
guess - a P4 with DDR or DDR2 memory??? maybe if we look a bit harder at
buffer cache performance you could get 1.2GB/s or more - wouldn't that
be a good thing?
Cheers
Mark
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