Partitioning questions

dagmar at speakeasy.net dagmar at speakeasy.net
Fri Oct 4 09:36:17 PDT 2002


On Fri, 4 Oct 2002, Richard Lightman wrote:

> I am a bit suprised by the buffer-cache reads. AFAIK, the bus speed
> is 66MHz, and the bus is 16 bits, so how can I get results over
> 133 MB/sec? The controller is AMD-756 [Viper] IDE (rev 3).

Obnoxiously enough, that test merely test whether your CPU is fast enough
to recieve the data by copying the same junk data from the buffer over and
over--meaning it doesn't send anything across the bus at all.  On anything
above a 486 it's a pretty useless do-nothing test now.

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