Re: [PATCH 3/4] Documentation/scheduler/sched-deadline.txt: improve and clarify AC bits

2014-08-13 Thread Juri Lelli
Hi, On 12/08/14 22:22, luca abeni wrote: > On Tue, 12 Aug 2014 11:11:00 -0700 > Randy Dunlap wrote: > [...] >>> + The utilisation of a real-time task is defined as the ratio >>> between its >>> + wcet and its period (or minimum inter-arrival time), and >>> represents >> >>"wcet" seems to be u

Re: [PATCH 3/4] Documentation/scheduler/sched-deadline.txt: improve and clarify AC bits

2014-08-12 Thread luca abeni
On Tue, 12 Aug 2014 11:11:00 -0700 Randy Dunlap wrote: [...] > > + The utilisation of a real-time task is defined as the ratio > > between its > > + wcet and its period (or minimum inter-arrival time), and > > represents > >"wcet" seems to be used here without any explanation of what it > mea

Re: [PATCH 3/4] Documentation/scheduler/sched-deadline.txt: improve and clarify AC bits

2014-08-12 Thread Peter Zijlstra
On Tue, Aug 12, 2014 at 11:11:00AM -0700, Randy Dunlap wrote: > > + wcet and its period (or minimum inter-arrival time), and represents > >"wcet" seems to be used here without any explanation of what it means. Occupational deficiency I suppose: Worst Case Execution Time. Yes it would be good

Re: [PATCH 3/4] Documentation/scheduler/sched-deadline.txt: improve and clarify AC bits

2014-08-12 Thread Randy Dunlap
On 08/12/14 08:49, Juri Lelli wrote: > From: Luca Abeni > > Admission control is of key importance for SCHED_DEADLINE, since it guarantees > system schedulability (or tells us something about the degree of guarantees > we can provide to the user). > > This patch improves and clarifies bits and p

[PATCH 3/4] Documentation/scheduler/sched-deadline.txt: improve and clarify AC bits

2014-08-12 Thread Juri Lelli
From: Luca Abeni Admission control is of key importance for SCHED_DEADLINE, since it guarantees system schedulability (or tells us something about the degree of guarantees we can provide to the user). This patch improves and clarifies bits and pieces regarding AC, both for UP and SMP systems. S