real-time summary

Dan Kegel dank at
Fri Apr 26 10:00:33 PDT 2002

George Kraft IV wrote:
> Could someone summarize what are the past, present, & future "real time"
> standards, what the status of Linux is (ie., AIO, librt), and what work is being
> done to improve Linux to meet the current standard?

Ben LaHaise is working on an implementation of AIO that differs 
from Posix AIO, but has (or can have) a Posix AIO compatibility
layer.  This is good, as Posix AIO doesn't cover some important
things, and a few programs that need advanced AIO will benefit.
I still haven't tried it myself.

The patches (for 2.4.18-pre3 and glibc, I think) at
Detailed design notes at
It and the older SGI KAIO mentioned at

It's not complete, and bugs are still being found in corner cases,
but it's already usable for apps that really, really need it.

- Dan

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