There is a discussion on sage-support where Simon King
mentions the multimodular algorithm for computing determinants
of integer-valued matrices as a good use case for parallelism:
https://groups.google.com/d/topic/sage-support/EQ3LjOdDHvM/discussion
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On Wed, Jul 11, 2018 at 7:11 AM, Julian Rüth wrote:
> Thanks for the feedback so far. It seems that there are pros and cons to all
> of the options.
>
> What about the following: We go with the somewhat random min(8, number of
> threads) and print a warning once if "number of threads" > 8
Le mercredi 11 juillet 2018 16:11:01 UTC+2, Julian Rüth a écrit :
>
> Thanks for the feedback so far. It seems that there are pros and cons to
> all of the options.
>
> What about the following: We go with the somewhat random min(8, number of
> threads) and print a warning once if "number of
Thanks for the feedback so far. It seems that there are pros and cons to
all of the options.
What about the following: We go with the somewhat random min(8, number of
threads) and print a warning once if "number of threads" > 8 (telling the
user to export SAGE_NUM_THREADS)? Note that this
On Monday, July 9, 2018 at 9:49:12 PM UTC-7, Jori Mäntysalo wrote:
>
> On Mon, 9 Jul 2018, John H Palmieri wrote:
>
> >> I would also expect it to run as many threads as my laptop has
> >> cores (+ hyperthreading if available).
>
> > This makes sense for single-user machines, but the current
On Mon, 9 Jul 2018, John H Palmieri wrote:
I would also expect it to run as many threads as my laptop has
cores (+ hyperthreading if available).
This makes sense for single-user machines, but the current default was
implemented because it was deemed safer on machines used by multiple
users.
On Monday, July 9, 2018 at 2:27:20 PM UTC-7, Friedrich Wiemer wrote:
>
> I would also expect it to run as many threads as my laptop has cores (+
> hyperthreading if available).
>
This makes sense for single-user machines, but the current default was
implemented because it was deemed safer on
>
> The question is: What is a good default for things such as @parallel when
> SAGE_NUM_THREADS has not been set? I think that 1 is not a good one.
>
+1
The actual number of cores/threads on a system probably isn't either on
> servers with lots of cores. At some point we had `min(8, number
I would also expect it to run as many threads as my laptop has cores (+
hyperthreading if available).
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