Messages in this thread | | | Date | Tue, 19 Dec 2017 10:38:39 -0600 (CST) | From | Christopher Lameter <> | Subject | Re: [PATCH 4/5] sched/isolation: Residual 1Hz scheduler tick offload |
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On Tue, 19 Dec 2017, Peter Zijlstra wrote:
> > Depends what one means by RT. > > Real Time computing as per the literature. Any other definition is > wrong and confusing.
That is an understanding of language rooted in the positivism of the early 20th century which was intending to assign a single and clear meaning to each word (Betrand Russell f.e.). Contemporarily the meaning of words are determined by the use cases for those words in communities and in particular by the function of these words (See Wittgenstein).
And the term RT has been heavily abused by marketing folks to mean any number of things so people can use RT to refer to variety of things. So please always clarify what you mean exactly.
You mean RT in CS academic literature from the 1990s I guess? Mostly useless for real workloads...
Frederic is probably more using the misleading characterization of "realtime" as spread by the marketing teams of leading distros that suggests low latency and less OS noise.
But then in business in general "realtime processing" is a term used opposed to "offline" processing. A system that reacts in real time is a system that continually reacts against inputs without offline processing of data. Which can be minutes.
So lets better avoid that term entirely.
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