From owner-freebsd-current  Mon Nov 20  5:35:51 2000
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Date: Mon, 20 Nov 2000 05:35:40 -0800
From: Julian Elischer <julian@elischer.org>
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To: Stanislav Grozev <tacho@orbitel.bg>
Cc: Maxim Sobolev <sobomax@FreeBSD.org>, current@freebsd.org
Subject: Re: -current scheduler strangeness
References: <20001120142326.A97732@thing.orbitel.bg> <20001120142543.B97732@thing.orbitel.bg> <3A191B13.60A7C199@FreeBSD.org> <20001120152154.A644@thing.orbitel.bg>
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Stanislav Grozev wrote:
> 
> On Mon, Nov 20, 2000 at 02:37:39PM +0200, Maxim Sobolev wrote:
> > > > pcm0: <Yamaha OPL-SAx> at port 0x220-0x22f,0x530-0x537,0x388-0x38b,0x330-0x331,0x370-0x371 irq 5 drq 0,1 on isa0
> >
> > It could be due to my commit in which I reduced buffer size in mss driver from 64K to 4K. Please try to increase it to 8KB, 16KB etc and let me know if it
> > helps ("#define MSS_BUFFSIZE (4096)" line in src/sys/dev/sound/isa/mss.c).
> >
> 
> the results:
> 
> 8k - plays absolute garbage (this is strange, because with 4k it plays music,
> but skips)
> 16k - plays music, the skips aren't so often heard as with 4k, but are
> often enough to be annoying
> 32k - everything plays fine, even with 3 compilations and heavy disk access.
> 
> so, thanks for the quick answer - I will now keep it at 32k, i don't know
> the rationale of downing this to 4k. maybe you should commit it to 32k in
> the repo too?


Maybe it should be self tuning according to the speed of the data.
I don't understand why the hwptr would go backwards due to system load.. 
if this is an underflow, then the message should say so...

> 
> -tacho
> 
> --
>    [i don't follow] | [http://daemonz.org/ || tacho@daemonz.org]
>    [everything should be made as simple as possible, but no simpler]
>    0x44FC3339 || [02B5 798B 4BD1 97FB F8DB 72E4 DCA4 BE03 44FC 3339]
> 
>   ------------------------------------------------------------------------
>    Part 1.2Type: application/pgp-signature

-- 
      __--_|\  Julian Elischer
     /       \ julian@elischer.org
    (   OZ    ) World tour 2000
---> X_.---._/  presently in:  Budapest
            v


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