Bill Hart wrote:
Leif said he was going to tune on a bobcat, but hasn't yet.
Well, this of course^TM turned out to be a can of worms... ;-)
So far it looks like the bobcat version of mpn_sqr_basecase was actually
faster, but I don't really trust the figures. (I played a little with
the "precision" option, but this seems to be logically limited to 2^31.
With the default precision, I occasionally get non-monotonic numbers;
not that one value was exceptionally bad -- as one would expect, but
timings about twice as fast, despite both cores being on "performance",
and the machine mostly idle.)
Still have to analyze how reliable individual thresholds are.
-leif
That may be because I mentioned there is an additional step for the
bobcat. We need to know if mpn/x86_64/bobcat/sqr_basecase.as
<http://sqr_basecase.as> or mpn/x86_64/sqr_basecase.asm is faster.
This can be determined by running:
./configure
make
make clean
cd tune
make speed
./speed -s 1-40 mpn_sqr_basecase
before and after deleting mpn/x86_64/bobcat/sqr_basecase.as
<http://sqr_basecase.as>
Assuming it is faster after deleting it (smaller numbers are better --
and we assume they will be smaller), run make tune and send the results
to us.
Actually, I just realised, we'd like to know the same thing about
mpn/x86_64/atom/sqr_basecase.as <http://sqr_basecase.as> on the atom.
Bill.
On 24 March 2014 11:12, Frithjof Schulze <sfrith...@gmail.com
<mailto:sfrith...@gmail.com>> wrote:
On Friday, March 21, 2014 5:37:16 PM UTC, Bill Hart wrote:
Note MPIR will run very slow on these machines without proper
tuning values due to significant recent changes. So we'd
appreciate any help.
We can also tell you how to do the tuning yourself and send us
the values (it's really easy).
I have a netbook with an E-350 and also an older atom based netbook.
I could tune MPIR on both, if nobody has done so yet.
--Frithjof
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