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Jacob Hitze
Jacob Hitze

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Less is the same?

Yesterday I set fah6 to finish up the second group of CPUs. In theory it is now using just one CPU socket’s worth of threads.
server fah6 ppd yesterday

Over 24 hours it finished the WUs, and started fresh on just one group.
fah 6 - less cpus, same points

The PPD didn’t go down. On the f@h discord, it was brought up that the realistic upper limit of the CPU cores is 32. Luckily I have an exact replica of that server, already running 32 CPUs.

fah6 and fah7 different CPU count, same points

So on these 2socket, 40c, 80t machines, setting CPUs to 80 produces roughly the same PPD as setting it to 40 or 32. The next test is lowering the CPUs setting to 20, to match one socket’s actual core count.

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