On Mon, 2007-25-06 at 13:08 -0400, Benjamin LaHaise wrote:

CPUID:

vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Xeon(TM) CPU 2.80GHz

shows that it is a P4 Xeon, which sucks compared to:

vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Genuine Intel(R) CPU                  @ 2.66GHz

which is a Core 2 based Xeon. 

Ok. Should the model name at least reflect one being a Xeon P4 and other
as core2 Xeon? ;->
 

 The tuning required by the P4 is quite 
different than the Core 2, and it generally performs more poorly due to 
the length of the pipeline and the expense of pipeline flushes.

I would be very interested to see some numbers on a proper Core2 based
Xeon (unfortunately cant afford one). You have the hardware, what says
you? ;->
AFAIT, the main reason Opterons has the numbers it does is due to 
the integrated on chip MC. I dont see Intel any time soon getting rid of
that (for economical reasons more than technical).
In any case i see batching as actually being a lot more cache friendly
too.

cheers,
jamal