International Business Machines Corporation
Reducing impact of context switches through dynamic memory-mapping overallocation

Abstract:

A method including: receiving, via a processor, established upper bounds for dynamic structures in a multi-tenant system; creating, via the processor, arrays comprising related memory-management unit (MMU) mappings to be placed together; and placing the dynamic structures within the arrays, the placing comprising for each array: skipping an element of the array based on determining that placing a dynamic structure in that element would cause the array to become overcommitted and result in a layout where accessing all elements would impose a translation look aside buffer (TLB) replacement action; and scanning for an array-start entry by placing the start of a first element at an address from which an entire array can be placed without TLB contention, and accessing, via the processors, all non-skipped elements without incurring TLB replacements.