Mark , Thanks for the tips and info.
There are two reasons for running threads on specific cores : 1) The possible need for a tight loop for receiving serial data. 2) The program is serial in nature receiving data, does not use X11 , controls the mouse and keyboard using libusb , and writes directly to the graphics card frame buffer (very fast). I have found that when multicore is enabled in the BIOS , or if I set the process to use more than one core with sched_setaffinit() , it appears the Linux scheduler is causing a problem and somehow mucks up some of the graphics when the data load increases , as the scheduler then starts to try and spread the load between the two cores. If only one core is used everything works fine. Regards Brian -- View this message in context: http://free-pascal-general.1045716.n5.nabble.com/GetAffinity-SetAffinity-tp3351231p5717543.html Sent from the Free Pascal - General mailing list archive at Nabble.com. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
