On Thursday 01 March 2007 03:16, Phil Thompson wrote: > On Thursday 01 March 2007 10:47 am, V. Armando Sole wrote: > > Hello, > > > > I just have a simple question (that does not imply a simple answer). > > > > With all the new options/possibilities recently discussed concerning the > > GIL handling, is it possible to profit of multiple processors in Python > > using QThreads thru PyQt4? > If a large amount of the time is spent in C++(Qt, or your own custom sip modules), then yes, it should allow more concurrency. Already using QThreads could be a big win if the threads spend time blocking on IO or other operations that already released the GIL.
> The issues of a single GIL haven't gone away. The only difference is that > the GIL is (probably) released much more frequently than it was before. The > changes are to do with correctness (specifically deadlock avoidance) rather > than performance. > > I don't know what the performance effect would be on a multi-processor. > Matt said that he could run more threads but I don't know what hardware he > has. I noticed a (small) degradation on my uni-processor - as would be > expected. I'm running a dual proc, single core xeon(3.06Ghz), so it would make sense that I gained a bit of performance, though it was only my impression. Matt _______________________________________________ PyKDE mailing list PyKDE@mats.imk.fraunhofer.de http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
