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Re: Speed of Mathematica on AMD machines

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  • Subject: [mg126451] Re: Speed of Mathematica on AMD machines
  • From: A Retey <awnl at>
  • Date: Sat, 12 May 2012 04:50:43 -0400 (EDT)
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  • References: <jog00v$g1d$> <joi3kq$n3s$>


> In the past, Intel had been known to engage in anticompetitive practices
> with respect to AMD, and quite rightly was subject to legal penalties for
> this. (Specifically, they encouraged large computer manufacturers such as
> ...
> which both show that Bulldozer performance is a very mixed bag in general.
> While there are a few applications in which it can match or only just
> outperform Intel's offerings, for the most part it falls behind them
> considerably.

Very good points, Oleksandr, I agree with everything except that you 
could argue just as well that the the performance of intels processors 
is a mixed bag, after all they could be expected to be faster where 
Bulldozer matches or outperforms them.

I think the point is that processors (and more important: bundles of 
hardware+OS+software) _are_ different and there is not a single number 
which you can reliably use to compare them -- your best deal depends on 
what exactly you are doing. That's not a very new finding though, you'll 
find that conclusion everywhere (actually whether that conclusion is 
made is a good measure of quality and impartiality of what you read).

If you really try to find the optimal deal that's a tough job, and I 
think even experts can't do reliable forecasts without some 
experimentation on the real thing. Fortunately processors are so fast 
nowadays that you can get done quite a lot even with a poor choice...


PS: All this of course doesn't change the fact that Intel has the better 
package for a majority of use cases these days...

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