Barney's Blog

Blog archive

Multi-Core Multi-Problems

Multi-core processors have such promise. Imagine: Instead of one CPU, you have two, four, eight, 16 or perhaps many more. Why, your performance would multiply! But performance increases aren't linear -- not even close.

I looked into this subject and found it stunningly complex. The bottom line is that unless a program is specifically designed for cores, there isn't a huge performance increase. Sometimes, apps even run slower because the clock speed on the multi-cores is slower.

Now there's another issue holding back multi-core: It seems that multi-cores can't efficiently use memory. The CPU may be ready to grind away, but the memory can't respond fast enough. One solution? Putting memory right on top of each CPU. Interesting.

Do you have a dual- or multi-core machine? And if so, how does it work? Share your experience at [email protected].

Posted by Doug Barney on December 10, 2008 at 11:53 AM


Featured

  • Microsoft Secure Score Hits General Availability

    Microsoft on Monday announced the general availability of the Microsoft Secure Score service within the Microsoft 365 Security Center portal.

  • 2020 Microsoft Conference Calendar: For Partners, IT Pros and Developers

    Here's your guide to all the IT training sessions, partner meet-ups and annual Microsoft conferences you won't want to miss. (Now updated with COVID-19-related event changes.)

  • Microsoft Teams Roadmap: Support for 1,000 Meeting Attendees, New Hardware

    Microsoft Teams is poised to receive a raft of new features in the coming months, many of them designed to make remote videoconferences feel more "natural."

  • The 2020 Microsoft Product Roadmap

    From the next major update to Windows 10 to the next generations of .NET and PowerShell, here's what's on tap from Microsoft this year.

RCP Update

Sign up for our newsletter.

Terms and Privacy Policy consent

I agree to this site's Privacy Policy.