Subject: Re: lmbench on Cobalt box
To: Soren S. Jorvang <>
From: Simon Burge <>
List: port-mips
Date: 04/09/2000 00:14:41
"Soren S. Jorvang" wrote:

> Simon asked for a Linux/NetBSD lmbench comparison on my Cobalt box.
> The lack of a proper microtime() on Cobalt right now made lmbench act
> a little funny sometimes (and made the runs take a long time),

Is this the "taking 297 seconds to calculate CPU speed" and so on?  The
same problem exists on Alphas as well - I always thought it was neat the
my 60MHz R4400 took _way_ shorter than my 500MHz 21164 for an lmbench
run but never figured out why the timing goop was so different.

> so not
> all numbers may be dependable, but at least some of the results seem
> to indicate that we are somewhat behind Linux on MIPS at the moment.

The numbers don't seem too bad compared with the DEC 60MHz R4400 boxes,
except the the mmap latency is ~15 times faster.  I've been seeing quite
shocking figures on both pmax and alpha - that figure is amazingly good.