AMD for numerics - hype or not?

  • Thread starter Thread starter alex goldman
  • Start date Start date
Not knowing the Stream benchmark and discussing processor performance is
like discussing music and being deaf - it can be done, but it won't get you
very far.
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ask L. van Beethoven about opus 111 !

Joost
 
J.V.Ashby said:
And yet the information was there for you, and easily retrievable. And
as far as I can see from your posts, you still don't have it. Whose
loss?
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Last I checked, the royalists lost. Germans too.

That's not the point though, is it? It's just sophistry if even that.

I had $1000 that I would have paypaled you, had you written "empty hollow
thud" in your message, but you didn't. Whose loss?
 
Not knowing the Stream benchmark and discussing processor performance is
ask L. van Beethoven about opus 111 !
Click to expand...

Indeed 8-)...but at least he wasn't congenitally deaf...

Jan
 
I am curious why you maintain an offensive tone in your dialogue? Do
you find it helps extract the information you seek? I can see it would
help keep a thread going but would expect the discussion to wander
somewhat.

Running numerically intensive code on a laptop would seem rather odd
and I think you are correct that manufacturers are unlikely to have
much interest in providing you with performance information beyond what
is used for marketing.

The NAS tests are widely known and used in scientific computing and so
manufacturers have often run them internally. If you talk to them they
are often prepared to provide the numbers or point you at groups that
have already run the tests. It is not really to do with clout but
asking for relevant information about their products. AMD were
certainly prepared to provide such numbers when the Opteron came out
and, as far as I can recall, they did not know me from Adam. However, I
was interested in the numerical performance of their microprocessor in
motherboards suitable for clusters and not laptops which may have
helped get a response.
 
andy said:
I am curious why you maintain an offensive tone in your dialogue?
Click to expand...

My tone in talking to you is no more offensive than your earlier "I'm not
sure I'm wise to continue ..." remark, so please save your high-and-mighty
act for someone else.
 
I guess I will have to draw my own conclusions about why the tone. It
also needs at least two for a dialogue about AMD benchmarking and that
does not seem to be happening in this branch of the thread.
 
It's called DGEMM
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Grow up. Once I start carrying a signature "this post guaranteed not
typos" then you can start nitpicking.
Too generic a name to mean anything to me.
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google for "stream benchmark".

Btw, you can also try the HPC Challenge.

V.
 
Victor said:
Grow up. Once I start carrying a signature "this post guaranteed not
typos" then you can start nitpicking.


google for "stream benchmark".

Btw, you can also try the HPC Challenge.
Click to expand...

You know what I think? You aren't very familiar with BLAS, hence "DGEM"
instead of "DGEMM", and you aren't much of a computer scientist, and didn't
know "stream" meant "delayed list". So you thought it's OK to throw the
word around unqualified, and others would understand you.

Now that your shortcomings have been pointed out to you, you grasp at straws
("google") and try to be insulting ("grow up").

Do I want to keep talking to you? No.
 
alex said:
You know what I think? You aren't very familiar with BLAS, hence "DGEM"
instead of "DGEMM", and you aren't much of a computer scientist, and didn't
know "stream" meant "delayed list". So you thought it's OK to throw the
word around unqualified, and others would understand you.
Click to expand...

Yes, well done you are a very clever computer scientist.
Now that your shortcomings have been pointed out to you, you grasp at straws
("google") and try to be insulting ("grow up").
Click to expand...

What kind of straw? Define please or stop throwing words around qualified.
Do I want to keep talking to you? No.
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**** off then.
 
toby said:
He's an American: he just can't help it.
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This is an obvious troll, intended to start an intercultural flamefest.

Let's snuff it before it grows: Americans no ruder than Europeans. (I've
known too few Australians to form an opinion).

Your implication that this thread is an example to the contrary is simply
wrong:


"You are an idiot" - came from Germany, posted by "Jan Vorbrüggen", who
first whined about manners in this very thread.

"**** off then" - came from UK, posted by someone calling himself "Richard".


Admittedly, under the right circumstances, someone might get me angry, but
in this case, these fellas are so obviously beneath me intellectually, that
ticking me off is way beyond their ability, or yours for that matter.

Have a nice day!
 
andy said:
Do you want numbers for real numerical codes or linpack-type numbers?

For large matrices which overflow the cache of the microprocessor
performance is dominated by the speed of accessing main memory and only
weakly correlated with main processor clock speed.
Click to expand...

Yes and no. The linpack benchmark is also based on large matrices.
However, the basic operation (matrix-matrix multiplication) has the
potential for considerable cache reuse, so a proper implementation can
actually hide the fact that the cache is overflowing.

V.
 
andy said:
I am curious why you maintain an offensive tone in your dialogue? Do
you find it helps extract the information you seek?
Click to expand...

He *is* actually getting a fair amount of follow-up.

V.
 
We are in the process of incorporating AMD's optimized BLAS/LAPACK routines
into O-Matrix. We are not far enough along to provide worthy numerical
comparisons but the marketing line we got from AMD was "Using the AMD BLAS
you will get a much better MFLOP/$ ratio than with Intel". ...

Beau Paisley
Harmonic Software
www.omatrix.com
 
Harmonic Software said:
the marketing line we got from AMD was "Using the AMD BLAS
you will get a much better MFLOP/$ ratio than with Intel". ...
Click to expand...

The two processors are rather different, so this would make sense, even
if the instruction sets are compatible.

Victor.
 
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