[FLASH-USERS] Scaling problems

[Francisco Holguin]

Hi Pedro,

What if you just fix the number of blocks, and vary the cores?

-Paco

On Wed, Apr 5, 2023 at 5:13 AM pedro romero <
pedro.romero at greentownsbyfusion.com> wrote:

> Hi all,
>
>
>
> I am trying to scale up on computational resources and I came across a few
> issues. First of all, I am running the same +ug example (a modification of
> 2D Zpinch template) varying the number of cores, nxb and nyb but it shows
> no speed up as the number of cores increase (I am tuning Iprocs, Jprocs,
> nxb and nyb to always get an approximately equal grid).
>
>
>
> Furthermore, at a certain number of cores the program execution
> interrupts, and I get a SIGBUS error (which I attach to this message). Am I
> missing something? Is there any additional thing to consider?
>
>
>
> I will also attach the log file of one successful run using 36 cores and
> nxb=nyb=16 (which shows little or no speed up in comparison to a run on 12
> cores and nxb=nyb=28). Thank you in advance for any help.
>
>
>
> Pedro
>
>
>
>
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