FlexMem - Adaptive Page Profiling and Migration for Tiered Memory

Explore a 17-minute conference talk from USENIX ATC '24 that introduces FlexMem, an innovative page profiling and migration system for tiered memory. Delve into the limitations of existing system software for managing tiered memory and discover how FlexMem addresses these challenges. Learn about the combination of performance counter-based and page hinting fault-based profiling methods to enhance profiling quality. Understand how FlexMem dynamically determines the number of pages for demotion based on hot page accommodation needs and adjusts the warm page range according to promotion frequency. Examine the performance improvements achieved by FlexMem compared to state-of-the-art solutions like Tiering-0.8, TPP, and MEMTIS when evaluated with common memory-intensive benchmarks.