patacongo commented on issue #37: examples: hello: Show CPU index when running in SMP mode URL: https://github.com/apache/incubator-nuttx-apps/pull/37#issuecomment-580250205 For pthreads, GNU supports the non-POSIX (_np) function so set affinity and also: int pthread_getaffinity_np(pthread_t thread, size_t cpusetsize, FAR cpu_set_t *cpuset); But there is no application interface like this for tasks. There is the internal (only) nxsched_getaffinity(). In NuttX all tasks are the same, so you could argue as Xaio Xiang did that nxsched_getaffinity() could then become a systen call, replacing the pthread_getaffinity_np() system call . sched_getaffinity() and pthread_getaffinity_np() would then be demoted to a libs/libc/pthread functions that just invoke the nxsched_getaffinity() system call (nxsched_getaffinity() would be the system call because the return values are different for the two libs/libc/pthread functions.
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