CS 585 Summer 2002 By Robert Moncrief II IBM RS/6000 CS 585 Summer 2002 By Robert Moncrief II

POWER Architecture POWER First Introduced by IBM in 1990 Performance Optimized With Enhanced RISC First Introduced by IBM in 1990 Started with Micro Channel Architecture Now uses Peripheral Component Interface

Cycles for Operations

L1 virtual cache addressing

Figure 1. AIX 4.3 Virtual Address Space Layout   Size 64-bit Address Space 32-bit Address Space 1 Million TB X Above 4 GB 64,000 TB Program stack N/A 384,000 TB Reserved Shared library text & data Privately loaded programs Shared objects (default) Program text & data Below 4GB (Segment #) 15 256 MB Shared library data 14 Available to application 13 Shared library information Shared library text 3-12 2.56 GB 2 Program data & stack 1 Program text Kernel

Interesting Facts Can be big-endian and little-endian Scalable Improvements

Any Questions? IBM was not very helpful