Re: a joint letter on low latency and Linux

Gregory Maxwell (greg@linuxpower.cx)
Fri, 30 Jun 2000 01:40:51 -0400 (EDT)


On Thu, 29 Jun 2000, Cort Dougan wrote:

> Can you characterize what you mean by extensive? You can do FP in
> RTLinux. If you're going to be doing heavy computation you're not going to
> want to hold the cpu in RTLinux and should ship the data off to a
> user-level task to do the number crunching. Do you need to respond to an
> event, in realtime, and provide a response (that requires FP) within a
> given interval?

Exactly. The result of the intensive (read: frequently buggy and hard to
write code) has to make it back out with low latency (i.e. 99.9% of the
time <=5ms)

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