W dniu 09.06.2016 o 18:52, Abdulla Bubshait pisze: > On Thu, Jun 9, 2016 at 10:55 AM, Alex Williamson > <alex.l.william...@gmail.com> wrote: >> This seems rather obvious doesn't it? An emulated audio device is just a >> blob of code that requires the CPU to run it. Generating audio, it's highly >> susceptible to latency issues. At the same time you're apparently playing a >> game that consumes significant CPU time. Total CPU cycles on the system >> have a fixed limit. Therefore any time you exceed that limit or get close >> enough for scheduling latency to become an issue, you can expect the audio >> emulation to suffer. This is why bare metal has devices dedicated to >> various activities. Solutions are 1) get a faster system, 2) load the >> system less or maybe more optimally, 3) assign a device to offload the work. >> >> The "more optimally" part of 2) might include pinning vCPUs, pinning the >> emulator thread, leaving sufficient CPU power unassigned so that the host >> has enough capacity to run emulation at full speed, reducing host overhead >> via things like hugepages, etc... > I don't need to be playing games for it to have problems. I shut down > everything in > both the host and guest, plenty of cycles to spare. If I were to test > the speaker setting > in the windows Control Panel I get crackling. I have an i7 4790 so I > thought I had > enough cycles to be able to handle that part on its own. > > I do have vCPUs pinned to 2 of the cores, leaving 2 cores for the > host. I also have > hugepages setup. I tried changing the governor to performance and pinning qemu > to non-VM cores. It seems I cannot get a setup that doesn't have audio issues. > > I was wondering if there was a better way to move audio from the guest > to the host. > Make sure you disable any input devices and other output devices you are not using in windows (like hdmi audio). Also, are you running with -nographic option? if no, then try with it. I had those problems, but this helped me fix them.
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