Implementing feedback directed NUMA mitigation tuning

摘要

A method, system and computer program product are provided for implementing feedback directed Non-Uniform Memory Access (NUMA) mitigation tuning in a computer system. During a page frame memory allocation for a process, predefined monitored performance metrics are compared with stored threshold values. Responsive to the compared values, selected use of local memory is dynamically modified during the page frame memory allocation.

主权项

1. A method for implementing feedback directed Non-Uniform Memory Access (NUMA) mitigation tuning in a computer system comprising:
storing predefined performance metric threshold values; monitoring predefined performance metrics; performing a page frame memory allocation for a process by comparing said monitored predefined performance metrics with said stored predefined performance metric threshold values; and dynamically modifying selected use of local memory for the page frame memory allocation responsive to the compared values including responsive to not identifying a free frame in local memory, and identifying a free frame being available in remote memory, comparing a monitored ongoing cycles per instruction (CPI) with a stored CPI threshold value; and using a free frame from remote memory responsive to the monitored ongoing CPI being less than the stored CPI threshold value; and responsive to the monitored ongoing CPI being greater than the stored CPI threshold value, comparing a monitored ongoing page fault rate with a stored page fault threshold value, and stealing a page from local memory or stealing a page from remote memory responsive to the compared page fault values.