Re-implemented the memory_barrier() method to use "lock orl" which, according to Stack Overflow, is faster than mfence
Re-implemented the memory_barrier() method to use "lock orl" which, according to Stack Overflow, is faster than mfence

JustSid/Firedrake,JustSid/Firedrake,JustSid/Firedrake,JustSid/Firedrake