On Fri, Jan 11, 2002 at 11:26:30AM +0900, henry nelson wrote:
> On Thu, Jan 10, 2002 at 07:45:18PM +0100, Manuel Bouyer wrote:
> > Can you try the attached program ?
> > usage: /usr/bin/time ./tst /dev/rwd0d 1000
> > 
> > This measures the bandwidth between the disk cache and the host.
> 
> Neat! and Thanks.  Always wanted to time one of these old PC98's:
> 
> on PC9821Bf with WD AC31200
>        43.87 real         0.03 user         0.73 sys
> on PC9821Ne with IBM DPRA21215
>        31.17 real         0.09 user         2.24 sys
> on PC9801BA with Conner CP3544
>        41.97 real         0.10 user         1.79 sys
> 
> ..., but what does this tell me?

64*1000/41.97=1524.8987 KB/s on the IDE bus (speed between disk and host,
excluding issues with reading data from platters).

--
Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
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