OpenBSD and NetBSD doesn't have the cpuset_* feature

[rilysh]

Hi!

I was looking at the https://github.com/oneapi-src/oneTBB/blob/master/src/tbb/misc_ex.cpp file, and I noticed that a few several functions uses cpuset_*affinity() functions, but they're only available in FreeBSD. Neither OpenBSD or NetBSD seem to have these, and there seem to be no libc API to address this on OpenBSD. (NetBSD apparently have pthread_*affinity_*() and cpuset, https://man.netbsd.org/affinity.3 but I haven't dig further to this yet).

1. https://man.openbsd.org/cpuset_getaffinity (empty)
2. https://man.netbsd.org/cpuset_getaffinity (empty)

I've also noticed a few syscalls, but starting from OpenBSD 7.5 direct syscalls aren't permitted. The syscall wrapper is also removed from the libc and kernel. (https://marc.info/?l=openbsd-tech&m=169841790407370&w=2)

I just found oneTBB right now, so I'm not sure how useful misc_ex file is. Moreover I haven't compiled it to these specified target systems.

[pavelkumbrasev]

Hi @rilysh, misc_ex still in use and provides some platform specific functionality. I cannot comment on fullness of OpenBSD support in this specific part of functionality because BSDs are community supported platforms.
If you can test it on your side and provide a contribution with the improvement (if needed) we would be happy to help with it.

[nofuturre]

@rilysh is this issue still relevant?

[rilysh]

@rilysh is this issue still relevant?

Yes.
Compilation on both systems (NetBSD 10 and OpenBSD 7.5) fails. I haven't think about patching this yet. I just reported this approximately three weeks ago.