On Tue, Sep 08, 2009 at 07:17:30PM -1000, david wrote: > USB not sharing interrupts with anything? Andy's original post contained /proc/interrupts which showed some sharing was happening. Here's a cut: 16: 380396 233180 IO-APIC-fasteoi uhci_hcd:usb4, yenta 17: 829711 532117 IO-APIC-fasteoi uhci_hcd:usb5, ohci1394, HDA Intel 18: 0 0 IO-APIC-fasteoi mmc0 19: 2 0 IO-APIC-fasteoi ehci_hcd:usb6 20: 18 17 IO-APIC-fasteoi uhci_hcd:usb1 21: 0 0 IO-APIC-fasteoi uhci_hcd:usb2 22: 305246 302929 IO-APIC-fasteoi ehci_hcd:usb3 Sharing interrupts adds a tiny delay to interrupt handling; if this has truly become significant, there's a design issue somewhere else. (Shared interrupts with modern kernels are not a huge problem, since the drivers check to see if the interrupt they have is legitimate before the kernel chains on to the next driver. It's the waste of that additional check that people want to avoid.) -- James Cameron http://quozl.linux.org.au/ _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
