cpu_affinity is not available on macOS
cpu_affinity is not available on macOS


Former-commit-id: 69e528fcb7b1c84963839ddf94382b5e3e29e93a [formerly 6f0bed3ffe616b7dd2875eb093e7fe21de6daaa2]
Former-commit-id: 251353f98de0cb6cf1ef9976068bc21f323d6624
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine