Em Mon, 7 Jan 2013 12:40:50 -0700 Jonathan Corbet <corbet@xxxxxxx> escreveu: > On Mon, 7 Jan 2013 00:09:47 +0100 > Alessandro Rubini <rubini@xxxxxxxxx> wrote: > > > I don't expect you'll see serious performance differences on the PC. I > > think ARM users will have better benefits, due to the different cache > > architecture. You told me Jon measured meaningful figures on a Marvel > > CPU. > > It made the difference between 10 frames per second with the CPU running > flat out and 30fps mostly idle. I think that probably counts as > meaningful, yeah...:) Couldn't this performance difference be due to the usage of GFP_DMA inside the VB2 code, like Federico's new patch series is proposing? If not, why are there a so large performance penalty? Regards, Mauro -- 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