[linux-audio-dev] Paper: sub-msec latency on a shielded CPU on SMP

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Subject: [linux-audio-dev] Paper: sub-msec latency on a shielded CPU on SMP
From: Benno Senoner (benno_AT_gardena.net)
Date: Fri Nov 15 2002 - 21:13:55 EET

Interesting article about achieving sub-msec response times by
"dedicating" one of the CPUs of a SMP box to high priority tasks using
a CPU shielding method.

http://www.linuxdevices.com/articles/AT8610061752.html

Unfortunately most of us have only single CPU boxes which means that
we rely on the performance of the low latency / preemptive patches.
According to Jussi L. the 2.4 patches seem currently having problems
with ext3 writes (journaling) but ReiserFS seems ok.
Jussi told me too that it seems that RedHat 8.0 does something nasty
because he got bad latencies on that distro (2.4+his -jl improved lowlat
patch).

Any news on that front ?
What worries me is Red Hat 8.0 since it will become a pretty popular
distro soon because it is targeted for the desktop.
This means soon we will have user complaining why their systems cannot
deliver solid sub-3msec latency.
Hopefully ext3 and other issues get fixed soon.

cheers,
Benno 

-- 
http://linuxsampler.sourceforge.net
Building a professional grade software sampler for Linux.
Please help us designing and developing it.

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