From: "Iain Sandoe" <iain@sandoe.co.uk>
To: Giuliano Pochini <pochini@denise.shiny.it>
Cc: linuxppc-dev@lists.linuxppc.org
Subject: Re: Sound skips
Date: Thu, 29 Mar 2001 09:52:32 +0100 [thread overview]
Message-ID: <20010329085335.527C32EFCE@apollo.valhalla.net> (raw)
>> >> You might want to try Andrew Morton's Low-Latency patch (URL:
>> >> http://www.uow.edu.au/~andrewm/linux/schedlat.html#downloads)
>
> Done. It doen't make a lot difference, but I can compile stuff without
> sound interruptions most of the time
OK. So nothing much has changed since I last tried it - note that those
patches take scheduling latency below 1ms on x86.
maybe we do have some IRQ blocking as well (I haven't had time to benchmark
that at 2.4.x - it's on the TODO list).
>(if it doesn't involve libtool).
hmmm. Have you got any idea what libtool does that is different?
(does strace work at the moment?)
mmap-ing files is "bad news" even with the LL patches (IIRC).
> I tried to lower the fragment size to 9 (512B==0.012s) and it skips
> even when the system is completely idle.
I don't know what UI you are using but...
does this occur each second (i.e. related to, for example, updating a clock
on screen) ... or
every 20/30 seconds or so - perhaps related to sync() ?
---
ah well, we'll solve it eventually [otherwise PPC is dead for sound - which
would be a Great Shame (tm).]
ciao,
Iain.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next reply other threads:[~2001-03-29 8:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-29 8:52 Iain Sandoe [this message]
2001-03-29 15:39 ` Sound skips Giuliano Pochini
2001-04-07 20:39 ` Giuliano Pochini
-- strict thread matches above, loose matches on Subject: below --
2001-04-09 9:34 Iain Sandoe
2001-04-08 14:52 Iain Sandoe
2001-04-09 7:56 ` Giuliano Pochini
2001-03-26 11:51 Iain Sandoe
2001-03-26 16:23 ` Geert Uytterhoeven
2001-03-26 8:56 Iain Sandoe
2001-03-26 10:34 ` Giuliano Pochini
2001-03-28 20:33 ` Giuliano Pochini
2001-03-26 4:30 Iain Sandoe
2001-03-26 7:17 ` Giuliano Pochini
2001-03-24 19:45 Iain Sandoe
2001-03-25 19:41 ` Giuliano Pochini
2001-03-24 15:39 Giuliano Pochini
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