On Sat, Jun 11, 2005 at 01:23:34AM +0200, Eric Piel wrote:
> 06/11/2005 01:04 AM, Paul E. McKenney wrote/a écrit:
> >>Just a small change to "1 - QoS":
> >>
> >>
> >>>b. For each service:
> >>>
> >>> i. Probability of missing a deadline due to software,
> >>> ranging from 0 to 1, with the value of 1 corresponding
> >>> to the hardest possible hard realtime.
> >>
> >>I think it should be (by reference to how you define probability at the
> >>beginning of the section):
> >>Probability of not missing any deadline due to software
> >
> >
> >Good catch! How about the following?
> >
> > i. Probability of meeting a deadline due to software,
> > ranging from 0 to 1, with the value of 1 corresponding
> > to the hardest possible hard realtime.
> >
> >Changing "missing" in the original to "meeting".
>
> It sounds strange to me (but english is not my mother tongue), it's like
> hardware was not so good but software helped to recover the situation
> and, eventually, the deadline was met ;-)
Hmmm... It would appear that English's being my mother tongue is not
helping me as much as one might hope. ;-)
> What about using the way you wrote it at the beginning of the section:
> "Probability of missing a deadline only because of a hardware failure"
Good point, I may just need to invert the whole thing, so that it
becomes something like:
i. Probability of missing a deadline due to software,
ranging from 0 to 1, with the value of 0 corresponding
to the hardest possible hard realtime.
But then the "p^n" becomes "1-(1-p)^n". Bleah.
OK, how about the following?
i. Probability of meeting a deadline in absence of hardware
failure, ranging from 0 to 1, with the value of 1
corresponding to the hardest possible hard realtime.
Thanx, Paul
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