Mapping applications for high performance on multithreaded, NUMA systems
Guojing Cong, Hui-Fang Wen · 2013
The communication latency and available resources for a group of logical processors are determined by their relative position in the hierarchy of chips, cores, and threads on modern shared-memory systems. Multithreaded applications exhibit different performance behavior depending on the mapping of software threads to logical processors. We observe the execution time under one mapping can be 5.4 times as much as that under another. Applications with irregular access patterns show the worst performance under the default OS mapping.