On Sun, 08 Dec 2019 18:31:27 +0100, Klaus Ethgen wrote: > > Hi Takashi, > > Am So den 8. Dez 2019 um 9:45 schrieb Takashi Iwai: > > On Sat, 07 Dec 2019 21:06:43 +0100, > > > Find attached the perf output of the relevant event handler. > > > > Thanks. So it seems wasting in the busy loop for waiting for the > > response from the codec. > > > > How about a patch below? It's untested, might break things, but at > > least avoiding a busy loop. > > I'll give it a try. Kernel is compiling right now. It might be hard to > see if the patch is working but I suppose that it do when I don't have > that trouble within a week or so. > > > BTW, if your machine is Coffeelake or Cannonlake, this patch wont' > > work on the old branch because of forced polling mode. It was removed > > in 5.5-rc1, so please test with Linus tree at best. > > I hardly have such new Architectures on that laptop. It is a lenovo x61s > so it is from latest 2009. It has a Intel Core 2 Duo LV (Merom). :-) OK, then could you give alsa-info.sh output, at least? Run the script with --no-upload option and attach the output. Basically my patch should improve a lot for Nvidia codecs, not only about the CPU time reduction, and it'd be worth for merging to upstream. OTOH, it's a change at the very core part, so it needs more testing, so it's likely for 5.6. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
