Studying for the A+, Network+ or Security+ exams? Get over 2,600 pages of FREE study guides at CertiGuide.com!
Join the PC homebuilding revolution! Read the all-new, FREE 200-page online guide: How to Build Your Own PC!
NOTE: Using robot software to mass-download the site degrades the server and is prohibited. See here for more.
Find The PC Guide helpful? Please consider a donation to The PC Guide Tip Jar. Visa/MC/Paypal accepted.
Take a virtual vacation any time at DesktopScenes.com - view my art photos online for FREE in either Flash or HTML!

[ The PC Guide | Systems and Components Reference Guide | Motherboard and System Devices | System Cache | Cache Characteristics ]

Integrated vs. Separate Data and Instruction Caches

Most (all?) level 2 caches work on both data and processor instructions (code, programs). They don't differentiate between the two because they view both as just memory addresses. However, many processors use a split design for their level 1 cache. For example, the Intel "Classic" Pentium (P54C) processor uses an 8 KB cache for data, and a separate 8 KB cache for program instructions. This is more efficient due to the way the processor is designed, and doesn't really affect performance very much compared to a single 16 KB cache, though it might lead to a very slightly lower hit ratio. Each of these caches can have different characteristics. For example they can use different mapping techniques (as they do on the Pentium Pro).

Next: Mapping Technique


Home  -  Search  -  Topics  -  Up

The PC Guide (http://www.PCGuide.com)
Site Version: 2.2.0 - Version Date: April 17, 2001
Copyright 1997-2004 Charles M. Kozierok. All Rights Reserved.

Not responsible for any loss resulting from the use of this site.
Please read the Site Guide before using this material.
Custom Search