On 5/8/26 10:15, Victor Eijkhout wrote:
**
I'm running with
OMP_PROC_BIND=true DEAL_II_NUM_THREADS=100 OMP_NUM_THREADS=100 ./foo
and
MultithreadInfo::n_threads();
tells me that there are indeed 100 threads.
However! htop seems to show only 1 or 2 cores active. And of course speed of
processing is abysmal.
What am I missing?
Victor,
you're not saying what program/functionality you're running. In general,
deal.II doesn't use OpenMP. It does parallelize some functionality via
Taskflow, but not everything is parallelized, and without knowing what it is
that ./foo actually does, it's hard to tell whether you *should* be able to
expect that things run in parallel.
Best
W.
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