Messages in this thread | | | From | Steve VanDevender <> | Date | Mon, 3 Jul 2000 21:54:56 -0700 (PDT) | Subject | Re: a joint letter on low latency and Linux |
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Albert D. Cahalan writes: > Digital UNIX (now Tru64, was OSF/1) uses self-modifying code to > create a generic kernel that can do, if I remember right: > > 1. plain > 2. real-time > 3. SMP > 4. real-time SMP > 5. lock debugging
I have a Digital UNIX box on my desk and admin several Digital UNIX boxes in my job. It is not too horrible, but I would not hold it up as a shining example of a system that can do realtime work. It wasn't until recently that I didn't have to wait through multi-second freezeups on my box whenever I did large amounts of file I/O. I'm not sure they really fixed the problem as much as painted it over in more recent Digital UNIX versions.
I don't think any sane person would want to maintain whatever self-modifying code tricks that Digital UNIX might use to accomplish this fabled feat. And did I mention that the Digital UNIX kernel is a massive 8 megabytes _after_ you prune out most of the optional features?
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