Linux vs MacOSX peformance, debunked

By: _Arthur (Arthur_.delete@this.sympatico.ca), May 18, 2006 7:30 am
Room: Moderated Discussions
Jasjeet Sekhon tested his statistical package under Linux and MacOSX on the same hardware, and concluded that MacOSX hybrid kernel was poorly implemented, (re-spouting Johan DeGelas allegations).

http://sekhon.berkeley.edu/macosx/intel.html

Ridiculous fish dug deeper, and debunked it:
http://ridiculousfish.com/blog/archives/2006/05/16/36/

The performance gap hinges on a single default mmap treshold parameter, which is set at 15Kb on MacOSX, and 128Kb on Linux, so Jasjeet's matrixes of 35Kb that are constantly allocated and de-allocated, were allocated from the heap with Linux, but had to go thru the virtual memory allocator under MacOSX.

Why this parameter is set so low with MacOSX is the real question. This parameter can be changed.

Argument-passing (messages) overhead was not the culprit.


< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
Hybrid (micro)kernelsTzvetan Mikov2006/05/08 04:41 PM
  Hybrid (micro)kernelsS. Rao2006/05/08 06:14 PM
  Hybrid (micro)kernelsBill Todd2006/05/08 06:16 PM
    Hybrid (micro)kernelsTzvetan Mikov2006/05/08 07:21 PM
      Hybrid (micro)kernelsnick2006/05/08 07:50 PM
      Hybrid (micro)kernelsBill Todd2006/05/09 01:26 AM
        There aren't enough words...Rob Thorpe2006/05/09 02:39 AM
          There aren't enough words...Tzvetan Mikov2006/05/09 03:10 PM
            There aren't enough words...Rob Thorpe2006/05/15 12:25 AM
        Hybrid (micro)kernelsTzvetan Mikov2006/05/09 11:17 AM
          Hybrid (micro)kernelsBill Todd2006/05/09 04:05 PM
  Hybrid (micro)kernelsrwessel2006/05/08 11:23 PM
    Hybrid kernel, not NTRichard Urich2006/05/09 06:03 AM
      Hybrid kernel, not NT_Arthur2006/05/09 07:06 AM
        Hybrid kernel, not NTRob Thorpe2006/05/09 07:40 AM
          Hybrid kernel, not NT_Arthur2006/05/09 08:30 AM
            Hybrid kernel, not NTRob Thorpe2006/05/09 09:07 AM
              Hybrid kernel, not NT_Arthur2006/05/09 09:36 AM
                Linux vs MacOSX peformance, debunked_Arthur2006/05/18 07:30 AM
                  Linux vs MacOSX peformance, debunkedRob Thorpe2006/05/18 08:19 AM
                    Linux vs MacOSX peformance, debunkedAnonymous2006/05/18 12:31 PM
        Hybrid kernel, not NTLinus Torvalds2006/05/09 08:16 AM
          Hybrid kernel, not NTAndi Kleen2006/05/09 02:32 PM
            Hybrid kernel, not NTmyself2006/05/09 03:24 PM
              Hybrid kernel, not NTmyself2006/05/09 03:41 PM
              Hybrid kernel, not NTBrendan2006/05/09 05:26 PM
                Hybrid kernel, not NTLinus Torvalds2006/05/09 08:06 PM
                  Hybrid kernel, not NTBrendan2006/05/13 01:35 AM
                    Hybrid kernel, not NTnick2006/05/13 04:40 AM
                      Hybrid kernel, not NTBrendan2006/05/13 09:48 AM
                        Hybrid kernel, not NTnick2006/05/13 07:41 PM
                          Hybrid kernel, not NTBrendan2006/05/13 09:51 PM
                            Hybrid kernel, not NTnick2006/05/14 05:57 PM
                              Hybrid kernel, not NTBrendan2006/05/14 10:40 PM
                                Hybrid kernel, not NTnick2006/05/14 11:46 PM
                                  Hybrid kernel, not NTBrendan2006/05/15 04:00 AM
                                    Hybrid kernel, not NTrwessel2006/05/15 07:21 AM
                                      Hybrid kernel, not NTBrendan2006/05/15 08:55 AM
                                        Hybrid kernel, not NTLinus Torvalds2006/05/15 09:49 AM
                                          Hybrid kernel, not NTnick2006/05/15 04:41 PM
                                          Hybrid kernel, not NTtony roth2008/01/31 02:20 PM
                                    Hybrid kernel, not NTnick2006/05/15 06:33 PM
                                      Hybrid kernel, not NTBrendan2006/05/16 01:39 AM
                                        Hybrid kernel, not NTnick2006/05/16 02:53 AM
                                          Hybrid kernel, not NTBrendan2006/05/16 05:37 AM
                  Hybrid kernel, not NTAnonymous2008/05/01 10:31 PM
                    Following the structure of the treeMichael S2008/05/02 04:19 AM
                      Following the structure of the treeDean Kent2008/05/02 05:31 AM
                        Following the structure of the treeMichael S2008/05/02 06:02 AM
                        Following the structure of the treeDavid W. Hess2008/05/02 06:48 AM
                          Following the structure of the treeDean Kent2008/05/02 09:14 AM
                            Following the structure of the treeDavid W. Hess2008/05/02 10:05 AM
                              LOL!Dean Kent2008/05/02 10:33 AM
                              Following the structure of the treeanonymous2008/05/02 03:04 PM
                                Following the structure of the treeDean Kent2008/05/02 07:52 PM
                                Following the structure of the treeFoo_2008/05/03 02:01 AM
                                  Following the structure of the treeDavid W. Hess2008/05/03 06:54 AM
                                    Following the structure of the treeDean Kent2008/05/03 10:06 AM
                                      Following the structure of the treeFoo_2008/05/04 01:06 AM
                                        Following the structure of the treeMichael S2008/05/04 01:22 AM
            Hybrid kernel, not NTLinus Torvalds2006/05/09 05:19 PM
              Microkernel Vs Monolithic KernelKernel_Protector2006/05/09 09:41 PM
                Microkernel Vs Monolithic KernelDavid Kanter2006/05/09 10:30 PM
                  Sigh, Stand back, its slashdotting time. (NT)Anonymous2006/05/09 10:44 PM
                  Microkernel Vs Monolithic Kernelblah2006/05/12 08:58 PM
                  Microkernel Vs Monolithic KernelRob Thorpe2006/05/15 01:41 AM
          Hybrid kernel, not NTAnalGuy2006/05/16 03:10 AM
            Theory versus practiceDavid Kanter2006/05/16 12:55 PM
              Distributed algorithmsRob Thorpe2006/05/17 12:53 AM
              Theory versus practiceHoward Chu2006/05/17 02:54 AM
                Theory versus practiceJS2006/05/17 04:29 AM
          Play online poker, blackjack !!! Gamezonex2007/08/16 01:49 PM
          Hybrid kernel, not NT (NT)atle rene mossik2020/12/12 09:31 AM
  Hybrid (micro)kernelsphilt2006/05/14 09:15 PM
    Hybrid (micro)kernelsLinus Torvalds2006/05/15 08:20 AM
      Hybrid (micro)kernelsLinus Torvalds2006/05/15 11:56 AM
        Hybrid (micro)kernelsRob Thorpe2006/05/16 01:22 AM
          Hybrid (micro)kernelsrwessel2006/05/16 11:23 AM
            Hybrid (micro)kernelsRob Thorpe2006/05/17 12:43 AM
              Hybrid (micro)kernelsrwessel2006/05/17 01:33 AM
                Hybrid (micro)kernelsRob Thorpe2006/05/19 07:51 AM
                  Hybrid (micro)kernelsrwessel2006/05/19 12:27 PM
      Hybrid (micro)kernelstechIperson2006/05/15 01:25 PM
      Hybrid (micro)kernelsmas2006/05/15 05:17 PM
        Hybrid (micro)kernelsLinus Torvalds2006/05/15 05:39 PM
          Hybrid (micro)kernelsColonel Kernel2006/05/15 09:17 PM
            Hybrid (micro)kernelsWink Saville2006/05/15 10:31 PM
              Hybrid (micro)kernelsLinus Torvalds2006/05/16 10:08 AM
                Hybrid (micro)kernelsWink Saville2006/05/16 09:55 PM
          Hybrid (micro)kernelsrwessel2006/05/16 11:31 AM
            Hybrid (micro)kernelsLinus Torvalds2006/05/16 12:00 PM
        Hybrid (micro)kernelsBrendan2006/05/16 01:36 AM
        Hybrid (micro)kernelsPaul Elliott2006/09/03 08:44 AM
          Hybrid (micro)kernelsRob Thorpe2006/09/04 09:25 AM
      Hybrid (micro)kernelsphilt2006/05/16 12:55 AM
        Hybrid (micro)kernelspgerassi2007/08/16 07:41 PM
  Another questionable entry on Wikipedia?Chung Leong2006/05/18 10:33 AM
  Hybrid (micro)kernelsisrael2006/05/20 04:25 AM
    Hybrid (micro)kernelsRob Thorpe2006/05/22 08:35 AM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell tangerine? 🍊