Dean Michael Berris wrote:
For multi-core set-ups where you have a NUMA architecture, having one thread allocate memory that's in a given memory controller (in a given core/CPU) that has to be a given size spanning multiple pages will give your OS a hard time finding at least two contiguous memory pages (especially when memory is a scarce resource). That's the virtual memory manager at work and that's a performance killer on most modern (and even not so modern) platforms.
Any chance you could cite some references for that? I can't help feeling that perhaps you have read something about finding contiguous _physical_ pages, which certainly could be a problem for e.g. kernel code but does not apply here, and have misinterpreted it as referring to _virtual_ pages. Thanks, Phil.