From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NfT5n-0003r8-9K for qemu-devel@nongnu.org; Thu, 11 Feb 2010 02:04:03 -0500 Received: from [199.232.76.173] (port=50783 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NfT5m-0003qG-7Z for qemu-devel@nongnu.org; Thu, 11 Feb 2010 02:04:02 -0500 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1NfT5j-0002wV-Ss for qemu-devel@nongnu.org; Thu, 11 Feb 2010 02:04:01 -0500 Received: from ey-out-1920.google.com ([74.125.78.144]:12296) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1NfT5j-0002w9-FP for qemu-devel@nongnu.org; Thu, 11 Feb 2010 02:03:59 -0500 Received: by ey-out-1920.google.com with SMTP id 3so1478786eyh.2 for ; Wed, 10 Feb 2010 23:03:58 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: <12d708831002101540m1061cc8ag2e5d31c6d73f31c0@mail.gmail.com> <12d708831002102247n3438bf09h502d1f4050723f3d@mail.gmail.com> Date: Thu, 11 Feb 2010 08:03:58 +0100 Message-ID: <12d708831002102303t777e6f83g563311cc0f9cf1a1@mail.gmail.com> Subject: Re: [Qemu-devel] Audio latency From: Alberich de megres Content-Type: text/plain; charset=ISO-8859-1 List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: malc Cc: qemu-devel@nongnu.org On Thu, Feb 11, 2010 at 7:53 AM, malc wrote: > On Thu, 11 Feb 2010, Alberich de megres wrote: > >> I'm using the alsa driver. >> Even I tried to change some values using the export and some flags >> that -audio-help shows, but nothing significant. > > Please do not top post. Sorrry!! > >> >> >> On Thu, Feb 11, 2010 at 1:03 AM, malc wrote: >> > On Thu, 11 Feb 2010, Alberich de megres wrote: >> > >> >> Hi! >> >> >> >> I'm running qemu on suse, and i got a very high audio latency. For >> >> example, using windows latency is about 4s and audio gets distorted >> >> with little cuts. > > How do you measure it? With a program called dpc latency, it's for windows. > >> >> On the host side (suse), i changed the audio pci device latency to 99 >> >> but this only improves a little bit. > > As in: with setpci? Yes. I also tired, on host, to low latency to VGA to 10. > >> >> Other thing i noticed is when lowering video resolution, the audio >> >> latency gets better and better. > > Lowering video resolution of what? Guest, host? Yes, it was on guest. Even for example if i change the desktop or switch to a text terminal when things works better what suggested me that could be something with painting the screen. But i'm not shure if its just only a side effect of a bad launch command, or something else. > >> >> I started played with source code, but i'm just a newbie on qemu. >> >> Anyone can point some light to me please? >> >> >> >> thanks guys!! >> > >> > -audio-help is your friend, from there you can deduce (at the very least) >> > which audio driver your qemu uses. >> > > > It would also help to know which version of QEMU you run and exactly how > you invoke it. You're right..sorry: qemu-kvm -cpu core2duo -smp 2 -m 1024 -hda /home/nine/imgs/hda1.img -vga std -usbdevice tablet -name t1 -net nic,macaddr=55:54:00:12:34:56 -net tap,ifname=tap1,script=no -soundhw ac97 > > -- > mailto:av1474@comtv.ru > Thanks!!