Off topic discussion • Re: A bit of Raspberry with 144C/288T

When the number of worker threads requested is the same as the available hardware threads some runtimes set the affinity so Linux doesn't move them around. I can't remember whether the gcc OpenMP runtime does this or not, but from the results maybe not.

It does not, I tested.

If you typeat the shell before running the OpenMP code, are the performance results different?

Those eight-way Lenovo servers are available on eBay here too. If it weren't for a lack of dogs and a 3.6 KW circuit that's already powering enough obsolete computers, I'd get one to heat the dog house this winter. It looks like a good system on which to develop NUMA aware programs that can scale to many cores.

Maybe the next Pi will have a 144-core version.

Statistics: Posted by ejolson — Thu Aug 21, 2025 3:58 pm

---