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unix: add (*CPUSet).Fill helper to enable all CPUs #259

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unix: add (*CPUSet).Fill helper to enable all CPUs #259

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9 changes: 9 additions & 0 deletions unix/affinity_linux.go
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,15 @@ func (s *CPUSet) Zero() {
}
}

// Fill adds all possible CPU bits to the set s. On Linux, [SchedSetaffinity]
// will silently ignore any invalid CPU bits in [CPUSet] so this is an
// efficient way of resetting the CPU affinity of a process.
func (s *CPUSet) Fill() {
for i := range s {
s[i] = ^cpuMask(0)
}
}

func cpuBitsIndex(cpu int) int {
return cpu / _NCPUBITS
}
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