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Not All Cores Are Created Equal

Posted by kdawson on from the working-out-the-kinks dept.

joabj writes "Virginia Tech researchers have found that the performance of programs running on multicore processors can vary from server to server, and even from core to core. Factors such as which core handles interrupts, or which cache holds the needed data can change from run to run. Such resources tend to be allocated arbitrarily now. As a result, program execution times can vary up to 10 percent. The good news is that the VT researchers are working on a library that will recognize inefficient behavior and rearrange things in a more timely fashion." Here is the paper, Asymmetric Interactions in Symmetric Multicore Systems: Analysis, Enhancements and Evaluation (PDF).

3 of 183 comments (clear)

  1. Re:unsurprising. by symbolset · · Score: 0, Redundant

    This one goes to 11.

    --
    Help stamp out iliturcy.
  2. Whoosh by symbolset · · Score: 0, Redundant

    These go to eleven

    --
    Help stamp out iliturcy.
  3. Re:unsurprising. by cratermoon · · Score: 0, Redundant

    It's like, how much more black could this be, and the answer is none. None more black.