https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Lockfree-mpmc-was-updated/m-p/836398#M1607 <P><BR />Hello, </P><P><BR />I have been working all the night on the following problem:</P><P>'Sometimes' the producer threads of my Threadpool was hanging , <BR />and i have finally discovered what is the problem...</P><P>In the push() method inside lockfree_mpmc.pas you will see that <BR />it is using a repeat until , this tight loop around the CAS <BR />was not working properly and was hanging the producer threads <BR />from time to time, and the solution to this problem was to <BR />add a sleep(0) in this tight loop. </P><P>Now Threadpool is working perfectly , and is perfectly stable<BR />- i have tested it all the night ! - .</P><P><BR />Please download all my modules that contains lockfree_mpmc.pas<BR />- like ParrallelQueue, Threadpool, Pthreadpool , Parallel compression ,<BR />Parallel Quicksort etc. - </P><P>Welcome: <A href="http://pages.videotron.com/aminer/">http://pages.videotron.com/aminer/</A></P><P></P><P>Amine Moulay Ramadne</P><P><BR /><BR /></P> Wed, 21 Apr 2010 10:55:53 GMT aminer10 2010-04-21T10:55:53Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Lockfree-mpmc-was-updated/m-p/836398#M1607 <P><BR />Hello, </P><P><BR />I have been working all the night on the following problem:</P><P>'Sometimes' the producer threads of my Threadpool was hanging , <BR />and i have finally discovered what is the problem...</P><P>In the push() method inside lockfree_mpmc.pas you will see that <BR />it is using a repeat until , this tight loop around the CAS <BR />was not working properly and was hanging the producer threads <BR />from time to time, and the solution to this problem was to <BR />add a sleep(0) in this tight loop. </P><P>Now Threadpool is working perfectly , and is perfectly stable<BR />- i have tested it all the night ! - .</P><P><BR />Please download all my modules that contains lockfree_mpmc.pas<BR />- like ParrallelQueue, Threadpool, Pthreadpool , Parallel compression ,<BR />Parallel Quicksort etc. - </P><P>Welcome: <A href="http://pages.videotron.com/aminer/">http://pages.videotron.com/aminer/</A></P><P></P><P>Amine Moulay Ramadne</P><P><BR /><BR /></P> Wed, 21 Apr 2010 10:55:53 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Lockfree-mpmc-was-updated/m-p/836398#M1607 aminer10 2010-04-21T10:55:53Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Lockfree-mpmc-was-updated/m-p/836399#M1608 <P><BR />Hello again,</P><P><BR />I have retested my ParallelQueue algorithm , it's perfectly stable<BR />and it is scoring the same in my benchmarks on an Intel Core <BR />2 Quad Q6600:</P><P>17 millions of pop() transactions per second ! </P><P>and </P><P>3.4 millions of push() transactions per second ! </P><P><BR />And i am using ParallelQueue inside my Thread Pool Engine.</P><P><A href="http://pages.videotron.com/aminer/parallelqueue/parallelqueue.htm">http://pages.videotron.com/aminer/parallelqueue/parallelqueue.htm</A></P><P></P><P>Sincerely,<BR />Amine Moulay Ramdane.<BR /><BR /></P> Wed, 21 Apr 2010 11:10:32 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Lockfree-mpmc-was-updated/m-p/836399#M1608 aminer10 2010-04-21T11:10:32Z