The Old New Thing

How do I determine the processor's cache line size?

December 8, 2009 Dec 8, 2009 12/8/09

Raymond Chen

When doing high-performance computing, you need to worry about the CPU cache line size in order to avoid issues like false sharing. But how can you determine the processor's cache size? The function will give you characteristics of the logical processors in use by the system. You can walk the returned by the function looking for entries of...