<div dir="ltr"><div><div><div>Hi Neks,<br><br></div>I am trying to run my simulation with nek5000 on supercomputers, the size of the problem is something like:<pre> text data bss dec hex filename
2233955 187412 2554984280 2557405647 986ee9cf nek5000</pre></div>I don't have any problem when I use 32~64 CPUs to run parallel on supercomputers, but once I go for more than 64 CPUs, I always get "allocation failed" error. I have tried to run on different supercomputer like as Gordon SDSC, OSC, TACC, but I got the same type of error each time. I have checked the active memories, it seems for each of them memories have large unused portion. Does any one have any idea why when I increase the number of CPUs I get this allocation error?!<br></div><div><br></div>Thank you,<br>Ami<br></div>