实时 Linux 扩展已经过时了吗？
Ingo Molnar 的新实时和低延迟补丁是否会使之前的 Linux 实时扩展（例如 RTAI、Xenomai）变得过时？
Do the new real-time and low latency patches from Ingo Molnar render previous real-time extensions for Linux (such as RTAI, Xenomai) obsolete?
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尽管我还没有尝试在 Linux 上构建实时系统，但对我来说看起来不像。 RTAI 看起来像 API。 POSIX.4 会类似（当然，以我作为该委员会前副主席和本书作者的拙见，无限优越:）。
在我看来，Molnar 的工作似乎旨在为 Linux 提供实时性能。 因此，要编写一个真正的实时应用程序，您可能会谈论 (1) 使用实时 API 以及标准 *nix 调用，以及 (2) 非常仔细地构建您的应用程序，考虑到上面提到的技术实时 Linux Wiki。 所以总的来说，我想说你两者都需要。 甚至可能比那两个还要多！
Doesn't look like it to me, although I've not endeavoured to build a real-time system on Linux (yet). RTAI look like APIs. POSIX.4 would be similar (and of course infinitely superior in my humble opinion as the former vice-chair of that committee and author of the book :) .
Molnar's work looks to me as if it is designed to actually provide real-time performance to Linux. So to write a real, real-time application, you're probably talking about (1) using real-time APIs as well as the standard *nix calls, and (2) building your application very carefully, taking account of techniques mentioned on the Real-Time Linux Wiki. So in general, I'd say you need both. And probably even more than those two!