Issue

• There is a global pointer named 'numa_all_cpus_ptr' which is broken in that it doesn't function as documented.
• It is supposed to be set to ' a bitmask that is allocated by the library with bits representing all cpus on which the calling thread may execute.
• This seems to not work when the bitmask is set to only CPU0

$./t
numa_all_cpus_ptr: 1111111111111111111111111111111100
Number of CPUS in numa_all_cpus_ptr: 32

$ taskset -c 4 ./t
numa_all_cpus_ptr: 0000100000000000000000000000000000
Number of CPUS in numa_all_cpus_ptr: 1

$ taskset -c 0 ./t
numa_all_cpus_ptr: 1111111111111111111111111111111100
Number of CPUS in numa_all_cpus_ptr: 32

$ taskset -c 1 ./t
numa_all_cpus_ptr: 0100000000000000000000000000000000
Number of CPUS in numa_all_cpus_ptr: 1

• Note that the taskset -c0 ./t case should only have 1 bit set in the 0th position.