Daniël Mantione schrieb: > > Op Tue, 11 Dec 2007, schreef Florian Klaempfl: > >> Mattias Gärtner schrieb: >>> Zitat von Michael Schnell <[EMAIL PROTECTED]>: >>> >>>>> Think about the alternative: It is much harder to implement the same >>>>> parallel loop with TThread. So OpenMP makes parallel loops much easier >>>>> to implement. For me this is the 'Delphi' way: Makes things easy and >>>>> readable. >>>>> >>>> Of course you are right. In the example of "parallel" loops It's _a_lot_ >>>> easier to to use for the programmer. "Lightweight-threaded" stuff like >>>> parallel loops was not the original aim of ThreadEvents. The original >>>> target was a more "standard" use of threads. But it _can_ be used for >>>> parallel loops, too, and it follows the "Delphi-language-paradigms" a >>>> lot tighter than using TThread. >>>> >>>> I don't suppose that anybody will start implementing real parallel loops >>>> like suggested on the wiki page any time soon. >>> The examples are very artificial to demonstrate the problems. >>> Some real world examples / tutorials should be added on a new page. Parallel >>> algorithms are seldom taught in books/schools/university, so programmers are >>> not used to them. This is slowly improving. >> For me the whole OpenMP approach is really artifical, I don't see a real >> use in real world code for it honestly. > > It is common in the scientistware I benchmark daily. The evil geniuses > parallelize their applications by placing a some OpenMP hints in their > source code.
Yes, but only some loops. But just imagine how OpenMP could help in parallelization of the compiler? It can't imo. > > However, MPI is de facto the standard for parallelization and this is most > used. There are people who believe OpenMP is more efficient than MPI > (directly reading from another threads its data is more efficient than > sending messages between processes). However, modern MPI implementations > use shared memory and RDMA between processes to counter this; I have > seen little practical evidence that OpenMP is faster than MPI. > > Daniël > > > ------------------------------------------------------------------------ > > _______________________________________________ > fpc-devel maillist - fpc-devel@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-devel _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
