Soft CPU affinity
Soft CPU affinity
[Kernel] Posted Jul 4, 2019 15:03 UTC (Thu) by corbet
On NUMA systems with a lot of CPUs, it is common to assign parts of the workload to different subsets of the available processors. This partitioning can improve performance while reducing the ability of jobs to interfere with each other. The partitioning mechanisms available on current kernels might just do too good a job in some situations, though, leaving some CPUs idle while others are overutilized. The soft affinity patch set from Subhra Mazumdar is an attempt to improve performance by making that partitioning more porous.