On Mon, Feb 15, 2010 at 06:45:55AM -0800, Bernie Thompson wrote: > Add functions to pre-allocate and free usb bulk urbs for core render path. > > Udlfb currently allocates a single urb, guarded by a mutex, that is a key > bottleneck. Because udlfb sends so much data, preallocation is most efficient. I'm not going to reject this patch, but are you sure about this being needed? The code path for creating a new urb is very tiny, just a memory allocation. Is that really noticable in any benchmarks or cpu usage that you have found? curious, greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
