News, Reviews & Betas which includes large community peer support An AMD employee has proposed a new patch dubbed PAN or Process Adaptive autoNUMA that can significantly boost the performance of multi-core systems like EPYC servers and super-computers.<\/b>
\nAMD is working on a new technology called «Process Adaptive autoNUMA» or PAN for short that is showing some promising early performance numbers as per internal AMD testing. Fellow website Phoronix spotted the development in a request for comment (RFC) patch sent in by AMD’s Bharat B Rao that talks about this newly proposed PAN feature. The Process Adaptive autoNUMA or PAN, as the name suggests, moves from a static auto-scan to an adaptive approach by collecting scan rates based on a per-process level instead of the currently used per-thread stats. The patch note suggests that by doing so, the new algorithm is better able to understand various application behaviors under NUMA or Non-Uniform Memory Access architectures. Under NUMA, a multi-processor system like an AMD EPYC server can access its remote memory as well. The NUMA design helps to add scalability and bandwidth and the new PAN patch can further improve on that. Testing conducted on a dual-socket (2P) AMD Milan 64 core\/128 thread system shows promising gains in some of the workloads. For example, there is nearly a 15% improvement in the Graph500 supercomputing benchmark as the PAN-enabled system was 14.93% better. There is also close to a 10 % gain in two out of four NAS Parallel benchmarks. You can find the full test results in the RFC patch linked at the source below. Source: LKML| Image: Phoronix<\/p>\n