December 2006
Beginner
320 pages
11h 17m
English
Content preview from Inside the MachineBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Tag RAM
When the CPU requests a byte from a particular block from RAM, it needs to be able to determine three things very quickly:
whether or not the needed block is actually in the cache (i.e., whether there is a cache hit or a cache miss)
the location of the block within the cache (in the case of a cache hit)
the location of the desired byte (or critical word) within the block (again, in the case of a cache hit)
A cache accommodates all three needs by associating a special piece of memory—called a tag—with each block frame in the cache. The tag holds information about the blocks currently being stored in the frame, and that information allows the CPU to determine the answer to all three of the questions above. However, the speed with which that ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.