On Fri, 29 May 2009, Pritpal Bedi wrote: Hi,
> Is it possible in Harbour that if the code below is executed on a multi cpu > machine, > we could see the multiple PIDs in the task manager. I mean is is possible to > execute threads on > multiple CPUs ? In Harbour all threads are executed on each available CPUs. It's default behavior of most OS-es and Harbour does not make anything to disable it and reduce scalability. I have no idea how it's presented in windows task manager. If you have multi CPU hardware then you can use test/speedtst.prg linked in MT mode and executed with --thread=2 --scale parameters to check the scalability factor. The test shows that Harbour is quite well scaled. Much better then xbase++ which seems to keep factor close to 1.0 what means that only 1 CPU is effectively used. The second thing is code use sent which cannot be compiled and executed by Harbour due to missing some functionality in XBASE++ THREAD class emulation, missing SLEEP() function and unsupported method declaration in class definition by: METHOD <mthName1> [, <mthNameN> ] SLEEP() can be replaced by: #xtranslate sleep( <n> ) => hb_idleSleep( <n> / 100 ) (please verify in xbase++ doc the SLEEP() precision and if it's millisecond use 1000 instead of 100). I'll add support to METHOD <mthName1> [, <mthNameN> ] declaration to hbclass.ch. Maybe it will make using xbase++ code in Harbour easier. The modifications in THREAD class are little bit more complicated. It's necessary to change default NEW() method or simply remove it and add at least some basic support for restarting the thread if ::interval is set. This modification should be done in rtl/tthreadx.prg. I'll make them in next commit but I would like to ask xbase++ users to make any other deeper modifications in this class when they are necessary. I have never used xbase++ and it's hard for me to replicate it's exact behavior. best regards, Przemek _______________________________________________ Harbour mailing list Harbour@harbour-project.org http://lists.harbour-project.org/mailman/listinfo/harbour
