Multicore - William Stallings Computer Organization and...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
William Stallings Computer Organization and Architecture 8 th Edition Chapter 18 Multicore Computers
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Some Definitions Bandwidth (data/time): physical (electrical) limit on how fast you can push electrons typically speed of a wire x number of wires Throughput (data/time): delivered (total) data flow after factoring in OS, hardware, and protocol overhead Latency (time): amount of time necessary to return a result Think about filling your gas tank… latency = time from pulling lever to start of gas flow into tank throughput = how fast tank fills
Image of page 2
Hardware Performance Issues Microprocessors have seen an exponential increase in performance Improved organization Increased clock frequency Increase in Parallelism Pipelining Superscalar Simultaneous multithreading (SMT) Diminishing returns More complexity requires more logic Increasing chip area for coordinating and signal transfer logic Harder to design, make and debug
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Alternative Chip Organizations
Image of page 4
Intel Hardware Trends
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Increased Complexity Power requirements grow exponentially with chip density and clock frequency Can use more chip area for cache Smaller Order of magnitude lower power requirements By 2015 100 billion transistors on 300mm 2 die Cache of 100MB 1 billion transistors for logic Pollack’s rule:
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern