IBM System Blue Gene Solution Blue Gene/Q Application Development

Memory

This chapter provides an overview of the memory subsystem and explains how it relates to the Compute Node Kernel (CNK). This chapter includes the following topics:

•Memory system overview

•Memory management

•Memory protection

•Shared memory

•Persistent memory

•Compute node ramdisk

•Support for the /proc file system

•L1P prefetcher

•L2 atomic operations

•Speculative execution

•Support for dynamic linking

•Transactional memory

4.1 Memory system overview

The Blue Gene/Q system contains a distributed memory system, which includes an on-chip ...