Re: Bottleneck on /dev/null

[Matti Aarnio]

On Thu, Mar 20, 2003 at 12:01:06PM -0500, Richard B. Johnson wrote:
...
> Yes. That's better. It may have been a diagnostic error
> in the code of the first person reporting this --also.
> 
> The data-rate is so high that I might have wrapped several
> times! I didn't think it would be that high, only 2 to 3
> gigibyte/second, not over 4 Gb/s (with 130MHz RAM no less)

  Furthermore,  in Linux you are really measuring syscall overhead
  to  "/dev/null" write,  which does never do memory transfers of
  any kind from user-space to kernel.

... 
> Its interesting that the data-rate is higher with the network
> plugged in and getting all those M$ broadcast messages. But, as
> expected, its more stable without.

  Quite so.

> Cheers,
> Dick Johnson

/Matti Aarnio