O'Reilly logo

Inside the Machine by Jon Stokes

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

The Pentium 4's Instruction Window

Before I discuss the nature of the Pentium 4’s instruction window, note that I’m using the terms instruction pool and instruction window somewhat interchangeably. These two terms represent two slightly different metaphors for thinking about the set of queues and buffers positioned between a processor’s front end and its back end. Instructions collect up in these queues and buffers—just like water collects in a pool or reservoir—before being drained away by the processor’s back end. Because the instruction pool represents a small segment of the code stream, which the processor can examine for dependencies and reorder for optimal execution, this pool can also be said to function as a window on the code stream. ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required