On Fri, Nov 15, 2013 at 2:11 PM, Antti Palosaari <crope@xxxxxx> wrote: > When I do it inside Kernel, in URB completion handler at the same time when > copying data to videobuf2, using pre-calculated LUTs and using mmap it eats > 0.5% CPU to transfer stream to app. > > When I do same but using libv4lconvert as that patch, it takes ~11% CPU. How are you measuring? Interrupt handlers typically don't count toward the CPU performance counters. It's possible that the cost is the same but you're just not seeing it in "top". Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
