Date: Mon, 4 Jun 2007 23:07:54 +1000 From: Norberto Meijome <freebsd@meijome.net> To: Ariff Abdullah <ariff@FreeBSD.org> Cc: freebsd-multimedia@freebsd.org Subject: Re: [snd_hda] Choppiness under high cpu - STABLE Message-ID: <20070604230754.5f223044@localhost> In-Reply-To: <20070604164420.5104fbaa.ariff@FreeBSD.org> References: <20070529134158.7b221ae2@localhost> <20070529131503.3b70a8e2.ariff@FreeBSD.org> <20070529163949.091c340f@localhost> <20070604140630.35eb3a5e@localhost> <20070604160928.0abb098b.ariff@FreeBSD.org> <20070604164420.5104fbaa.ariff@FreeBSD.org>
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On Mon, 4 Jun 2007 16:44:20 +0800
Ariff Abdullah <ariff@FreeBSD.org> wrote:
> >
> > Have you tried with 4096 ? Note: this should go into
> > hint.pcm.0.buffersize kernel hint, not sysctl variable. After
> > setting it (using kenv), you must reload the sound module or reboot
> > if it going through /boot/device.hints. The sysctl buffersize is
> > there purely as indicator.
> >
>
> I forgot to mention that enabling/disabling vchans are matters as
> well, so please take note on that.
ok - back to the klds from the src tree.
[betom@ayiin] [Mon Jun 4 22:30:37 2007]
/usr/home/betom
$ sysctl -a | grep snd
hw.snd.report_soft_formats: 1
hw.snd.targetirqrate: 32
hw.snd.verbose: 1
hw.snd.maxautovchans: 4
hw.snd.unit: 0
hw.snd.pcm0.buffersize: 4096
hw.snd.pcm0.vchans: 1
[betom@ayiin] [Mon Jun 4 22:30:43 2007]
/usr/home/betom
$ kenv | grep buffer
hint.pcm.0.buffersize="4096"
I tried 4096, 8192, 16384. In all cases, stress -m 1 brings up immediate
choppiness/chirping. :(
I'm now back to the binary blob... I repeated the tests (with default
buffersize of 16K, and 8 vchans as before), and it seems that with stress -m 2
there is an ever so slight chirpiness, more noticeable with -m 3 , definitely
there @ -m 4 - but definitely better than the other one.
thanks!!
B
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{Beto|Norberto|Numard} Meijome
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