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Linux Kernel Goes Real-Time

Several readers wrote to alert us to the inclusion of real-time features in the mainline Linux kernel starting with version 2.6.18. (Linus Torvalds had announced 2.6.18 on September 19.) Basic real-time support is now mainline. This will ease the job of developers of embedded Linux applications, who for years have been maintaining real-time patch sets outside of the mainline kernel. The announcement was made by TimeSys Corp., a provider of developer services. Much of the work was done by Thomas Gleixner at TimeSys and Ingo Molnar at Red Hat.

4 of 156 comments (clear)

  1. What does this really mean? by otter42 · · Score: 2, Insightful

    My reaction is mixed. I use RTAI in my lab, and this doesn't seem to say anything whatsoever about the technologies used in the claimed real-time kernel. In fact, from the article I don't really know if it's real real-time, or "harder but still soft" real-time. Either way, it's great that the kernel is finally seriously integrating real-time, as it's a step in the right direction for getting real-time software to work quickly and painlessly on office distros such as Ubuntu.

    Anyone know if this is just the ADEOS micro-kernel patch being distributed as part of the vanilla kernel? If not, is it compatible with RTAI, Xenomai, Fusion, and RTLinux?

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  2. Re:Real-time OS by HungWeiLo · · Score: 2, Insightful

    Don't be so sure. I've seen quite a few comments already about how "cool" and "faster" Linux will be now that it's real-time.

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  3. Re:What about media? by glarbl_blarbl · · Score: 2, Insightful

    Weird. /. seems to have edited my post, it's plain old text from now on, dammit.. That what I get for skipping preview I guess. Here's what I meant to say:

    I know what you mean, and IMO many times sensory limitations are generalized to the entire population while extraordinary indviduals who spend time training their senses will be able to exceed them. I had the benefit of learning from professionals in audio production in a collegiate setting. The ~30ms rule was one I heard from many of my instructors and verified for myself a number of times (on analog and digital gear in state of the industry studios). Since I graduated 9 years ago I have been actively training my ears, I have also been a multi-instrumentalist for nearly twenty years. So take from that what you will.

    I bet most people can't hear the difference between DVD quality and CD quality, and most of the consumer gear doesn't help there... I guess it's splitting hairs, but audio professionals who truly respect their craft will always strive to present the musicians' intent in the most transparent manner possible. I've always thought that breaking rules didn't mean much until I knew what they were.

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  4. Re:What about media? by deanj · · Score: 2, Insightful

    Not if the process you're using is a realtime process, which is what you'd want anyway.