Messages in this thread | | | From | Måns Rullgård <> | Subject | Re: [ANNOUNCE] Linux 2.6 Real Time Kernel | Date | Sat, 09 Oct 2004 21:38:41 +0200 |
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Lee Revell <rlrevell@joe-job.com> writes:
>> > > To the best of my understanding, this still doesn't provide >> > > deterministic hard-real-time performance in Linux. >> > >> > Using only the VP+IRQ thread patch, I ran my RT app for 11 million >> > cycles yesterday, with a maximum delay of 190 usecs. How would this not >> > satisfy a 200 usec hard RT constraint? >> >> I think the keyword here is "deterministic", isn't it? > > Well, depends what you mean by deterministic. Some RT apps only require > an upper bound on response time. This is a form of determinism.
Sure, but running for a zillion cycles without breaking some limit doesn't guarantee that it never will happen. Being able to give such a guarantee is what determinism is about.
-- Måns Rullgård mru@mru.ath.cx
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