Persistent Memory I/O Primitives (A. van Renen, DaMoN 2019)

[benclmnt]

Guidelines for effective usage of PMem

• Algos should be designed to fit data on PMem blocks (256 byte) rather than single cache lines (64 byte)
• Use streaming ops or stores followed by clwb, especially for data written to the same cache line, (e.g. array-like structures with size field or a global counter for time-stamping)
• Using too many threads can lead to reduced performance
• PMem read & write bandwidth is lower than DRAM. Prefer DRAM for performance-critical code.