A few more graphs.
Topographica:
C-Topo
I'm not sure what's causing performance go down at 52 cores for C. Last time in a similar experiment (except with 10000 density instead of 14400) 52 cores were showing very good efficiency. This could be a one-off glitch. Anyway, the point of this post is: topographica is still worse, even when subscribing only 4 cores per node.


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