* Luca Abeni <luca.abeni@xxxxxxxx> wrote: > Hi Ingo, > > On Thu, 21 Aug 2014 15:38:37 +0200 > Ingo Molnar <mingo@xxxxxxxxxx> wrote: > [...] > > > + If the total utilisation sum_i(WCET_i/P_i) (sum of the > > > utilisations > > > + WCET_i/P_i of all the tasks in the system - notice that when > > > considering > > > + multiple tasks, the parameters of the i-th one are indicated with > > > the "_i" > > > + suffix) is larger than M (with M equal to the number of CPUs), > > > then the > > > + system will surely not be able to respect all of the deadlines, > > > and no > > > + execution time is guaranteed for non real-time tasks, which risk > > > to be > > > + starved by real-time tasks. > > > > The last part doesn't really parse as correct English for me - > > maybe also split this overly long sentence into two or three > > sentences, to make it easier to understand? > Sorry about this; after re-reading the sentence, I agree it looks > confusing. What about: Looks good to me, with a few details: > " > If the total utilisation sum_i(WCET_i/P_i) is larger than M (with M > equal to the number of CPUs), then the scheduler can not be able to > respect all of the deadlines. s/can not be able to respect/is unable to respect > Note that the total utilisation is defined as the sum of the > utilisations WCET_i/P_i of all the real-time tasks in the system (when > considering multiple real-time tasks, the parameters of the i-th one are > indicated with the "_i" suffix). The parentheses are a bit confusing here - they come after a half finished sentence - which at the end turns out to have ended. How about something like: > Note that total utilisation is defined as the sum of the > utilisations WCET_i/P_i over all the real-time tasks in the > system. When considering multiple real-time tasks, the > parameters of the i-th task are indicated with the "_i" > suffix. ? > Moreover, if the total utilisation is larger than M, then non real-time > tasks risk to be starved by real-time tasks. How about: > Moreover, if the total utilisation is larger than M, then we > risk starving non- real-time tasks by real-time tasks. ? Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
