DragonFly users List (threaded) for 2005-03
Re: Differences between AMD and Intel CPUs [was: Re: Dragonfly and Hyperthreading....]
In a message dated 3/9/2005 3:11:55 PM Eastern Standard Time, Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx> writes:
> Well, all I can say EM (not knowing what you real name is since you
> haven't bothered to tell anyone) that I think you need to go back and
> actually do some research on equivalent systems, because nobody else
> is seeing the price differentials you are. Perhaps the problem is that
> you seem to have a requirement for PCI-X, which is a very new standard,
> which is severely limiting your choices.
You usually are up on things,Matt, but you seem to be a few
years behind lately, so maybe you need to come up for
air? Not knowing about the Pentium-M was surprising,
but now you seem stuck in 2001. I expect that from the
Europeons, but I'm surprised at you. You seem to
have made a major life's commitment to making a
faster O/S; do you really propose running these
multicore speed demons with a 1Ghz bus? What (the
hell) do I need a 3+ Ghz processor for if I'm running
on a bus thats 8X slower? What's the point of Hyper
tunneling if you have such a slow conduit to the outside
world? Where cares how fast the processor is if you can't
pass any data? And PCI-X is not any "newer" than the
Opteron or any of the other processors we've mentioned
here, so what exactly are you talking about when you
say its "new"?
A 1Ghz PIII with a PCI-X bus will outperform a 3.2Ghz
P4 with a regular PCI bus for a network application,
so yes, it is a basic criteria in any performance
oriented formula. Maybe you use your system to render
3D images, but I use mine for networking.
> Your comments on the Xeon systems are also incorrect... you have to
> realize that Xeons are a good fit for the economics that many commercial
> installations deal with. Xeon's are very good at handling a certain
> class of problems, primarily large parallel database applications, and
> because the commercial software in these markets is a *LOT* more
> expensive then the actual machine hardware, and usually taylored to
> have the best price point when running on big honking boxes, companies
> tend to buy big honking Xeon systems for that sort of thing.
We're not talking about "big honking parallel database
applications", so I don't see your point. I don't think
anyone said that Xeons had no value. I only said that
if you are building a box, there is no point in
considering a Xeon because they cost more for no benefit.
With new P4 chipsets and the lack of a decent MP O/S
there is no distinction between P4s and Xeons performance
wise. Xeons used to have larger caches and only Xeon
chipsets had PCI-X busses, but thats no longer
the case. So from a price/performance perspective for
the vast marjority of applications, Intel
wins by a large margin, which was my original point.
It seems that all anyone here cares about is how fast
you can do a 'make buildworld'. It makes one wonder if
there is any point to the project at all.