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• March 24, 2008 at 7:13 am #2245373
  

  linux OS support for Multicore

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  by gyanprakashpathak · about 17 years ago

  i want to know following:

  1. linux thread handling in multicore

  2. linux process scheduling for multicore

  3. any other special features of linux OS for multicore processors

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• • March 24, 2008 at 7:13 am #2561706
    

    Clarifications

    by gyanprakashpathak · about 17 years ago

    In reply to linux OS support for Multicore

    Clarifications

  • March 24, 2008 at 7:29 am #2561701
    

    I think you will need to read up …

    by Anonymous · about 17 years ago

    In reply to linux OS support for Multicore

    On this in one of the “Linux” magazines this will give you more in-depth detail.
    As for multi-processor tasking, Linux will do (nearly) all that you throw at it.

    More info here:

    http://softwarecommunity.intel.com/Wiki/Multi-threadappsforMulti-core/490.htm

    Please post back if you have anymore problems or questions.

    • March 24, 2008 at 9:46 am #2561614
      

      Linux has had multi processor

      by dumphrey · about 17 years ago

      In reply to I think you will need to read up …

      support for a good long while. Its refered to as the SMP kernel (symmetric multi processor).

      http://www.phy.duke.edu/~rgb/Beowulf/smp-faq/prive/mentre/smp-faq/smp-faq-3.html
      Is a good starting point. Most of what you are asking is Kernel related, and probably will not be on the message boards for a distro, though someone there may be able to point you along the way.

  • March 24, 2008 at 2:32 pm #2561438
    

    Some things…

    by Anonymous · about 17 years ago

    In reply to linux OS support for Multicore

    are best answered by reading and testing.

    To help you on your path here are the resuts of some benchmark I have done on a linux kernel. The standard compile means CPU load balancing,

    >
    AMD tl-60, Cores 2, Clock speed 2.00 GHz, L1 128Kb, L2 2 x 512
    Installed RAM 2 Gigabytes PC5300, Video NVidia GeForce8 8400M
    OS: Ubuntu 7.10

    Benchmarks 2.6.14.52 kernel compile (SMP restricted to two cores)
    **********************************************************************************

    CPU ZLib (Higher is better) Δ Performance Closest CPU’s
    ———————————————————————————-

    -CPU ZLib-
    Standard : 18502.373 + 100% Intel Celeron 2.00GHz 6825.732
    AMD K8 SMP : 21381.103 + 115.6% Intel Celeron 2.20GHz 6894.855
    EMT64 SMP * : 21659.341 + 117%

    CPU Fibonacci (Lower is better)
    ————-

    -CPU Fibonacci-
    Standard * : 4.277 + 103.7% Intel Pentium 4M 3.33GHz 3.507
    AMD K8 SMP : 4.434 + 100% 2x Intel Pentium 4M 3.33GHz 3.515
    EMT64 SMP : 4.283 + 103.5%

    CPU MD5 (Higher is better)
    ——-

    -CPU MD5-
    Standard * : 43.239 + 101.19% Intel Pentium 4 2.00GHz 21.948
    AMD K8 SMP : 42.792 + 100.14% Intel Pentium 4M 2.00GHz 22.212
    EMT64 SMP : 42.732 + 100%

    CPU SHA1 (Higher is better)
    ——–

    -CPU SHA1-
    Standard : 62.495 + 103% Intel Pentium 4M 1.70GHz 24.247
    AMD K8 SMP *: 63.055 + 103.9% Intel Pentium 4M 1.60GHz 24.408
    EMT64 SMP : 60.689 + 100%

    CPU Blowfish (Lower is better)
    ————

    -CPU Blowfish-
    Standard * : 18.542 + 101%2x Intel Core2 Duo T7500 2.20GHz 15.140
    AMD K8 SMP : 18.741 + 100% 2x Intel Core2 6420 2.13GHz 15.177
    EMT64 SMP : 18.555 + 100.07%

    FPU Raytracing (Lower is better)
    ————–

    -FPU Raytracing-
    Standard * : 13.723 + 100% 2x Intel Core2 T7600 2.33GHz 13.573
    AMD K8 SMP : 13.956 + 101.7% 2x Intel Xeon 3.40GHz 13.577
    EMT64 SMP : 13.871 + 101.08%

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