I've been doing some profiling. Executive summary: most of the cpu effort seems to be consumed by two function calls (uhci_urb_enqueue and uhci_irq) in the uhci-hcd module. Anyway, profiles attached.
-- usb backend hogs cpu https://launchpad.net/bugs/55656 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
