Fedora Core 2 wishlists

[Ori Pessach]

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Michael K. Johnson wrote:
| On Mon, Dec 08, 2003 at 11:20:35AM -0700, Ori Pessach wrote:
|
|>Will the 2.6 kernel shipped with Fedora Core 2 have the preemptible
|>kernel feature enabled? I would like to see that, since it would make
|>Fedora ready for low-latency pro audio work out of the box.
|
|
| No, the pre-emptible kernel feature doesn't seem to be quite ready
| yet.  However, the 2.6 kernel also has the lowlatency patchset applied,
| and that gives pretty much all of the benefit.  Clark Williams wrote
| a good paper on this a while ago.

What are the issues? (a pointer to the Clark Williams paper would be
fine as an answer). I saw a dramatic improvement in scheduling latency
when I recompiled the 2.6 test 11 kernel to enable the pre-emptible
kernel. When compared to the RPM available from
http://people.redhat.com/arjanv/2.5/RPMS.kernel/, scheduling latency was
down by an order of magnitude, if I remember correctly. If that kernel
RPM doesn't contain the lowlatency pathces, that's understandable, but
otherwise I'm not sure what's going on.

It would be nice not to have to recompile the kernel to get this
functionality.

- --
Ori Pessach
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