Re: new x86 flavours: -bigmem | -lowlat?
Bastian Blank <waldi@debian.org> writes:
Hi.
> On Fri, Jul 07, 2006 at 02:52:33AM +0200, maximilian attems wrote:
>> -bigmem got requested several times with CONFIG_HIGHMEM64G=y and
>> CONFIG_X86_PAE=y
>> added it for now in the d-k repository for 686.
>> there is a pending request for xen too.
>> also k7 .config will be added
>
> k7 makes no sense. Does there exist any chipset for amd k7 which
> supports more than 4GiB?
>
>> -lowlat with CONFIG_PREEMPT=y and CONFIG_HZ=1000 seems more controversial
>> although i could imagine plenty of happy user of it.
>> we might just add in the desc "may trigger strange bugs".
>> the positive flip side is lots of less skips on
>> multimedia apps like lastfm, totem, ..
>
> Really? I'm a heavy user of DVB hardware and video output and don't need
> preemption.
[cut]
Realtime preemption is absolutely necessary for ***audio*** applications
criticals. Try run jackd -R --periods 32 --nperiods 2 --rate 48000 (minimal for audio
serious, latency < 2,1 msec) and mplayer your favorite songs and see it yourself. About
video, I don't know.
Regards,
--
Marcio Roberto Teixeira
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