Re: [PARPORT] Speed of ppa 1.40 driver

Andrea Arcangeli (
Fri, 6 Feb 1998 16:22:46 +0100 (CET)

On Fri, 6 Feb 1998, David Gauchard wrote:

>> Could you perform a test using:
>> "time dd if=/dev/sda of=/dev/null count=20480"
>Shouldn't it be better to do:
>time sh -c "dd if=/dev/sda of=/dev/null count=20480; sync"

Not needed. The buffer cache sync take more than 0sec only if you are
_writing_ to a _block_ device. The reading device is not involved from

Andrea[s] Arcangeli

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