On 2019-08-29 05:44, Graham Inggs wrote:
I know this is an old bug report, but anyway...
But the ability to oversubscribe doesn't explain the bug here. Why
does openmpi think only 2 slots are available when in fact 4
processors
are available?
As per the ark.intel.com page for this CPU [1]:
# of Cores 2
# of Threads 4
So openmpi seems to be (correctly, IMHO) counting cores here, rather
than threads.
[1]
https://ark.intel.com/content/www/us/en/ark/products/88190/intel-core-i5-6300u-processor-3m-cache-up-to-3-00-ghz.html
Ah, of course, that's what Thibaut was saying too.
That makes it a bit awkward if nproc is returning number of threads not
cores. Heinrich said /proc/cpuinfo reports 4 CPUs.
Drew
