On Wed, 2004-05-12 at 07:35, Bob Chiodini wrote: > I was asked to troubleshoot a Xine DVD playback problem on a Dell > Inspiron 9100 (P4 3.2 GHz, HT-enabled). DVD playback was > "herky-jerky". > > I found that killing irqbalance or booting without ACPI=on seems to > correct the playback. Watching /proc/interrupts (with ACPI=on and > irqbalance running) indicates that each time the playback paused CPU1 > handled the interrupts for the DVD's IDE controller. When playback was > smooth CPU0 was fielding the IDE interrupts. Furthermore, xine was > running on CPU0. Without the ACPI=on cmdline parameter all of the > interrupts were handled by CPU0. The laptop is running the latest FC1 > kernel. > > Questions: > > Is there a way to associate a specific program (e.g. xine) with a > specific processor and also associate a device's interrupt with a > specific processor, without killing irqbalance or disabling ACPI? Try using run (man run). Forrest
