[FLASH-USERS] Scaling problems

[pedro romero]

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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