Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-08 Thread xiaofeng.yan
On 2014/7/8 15:49, Peter Zijlstra wrote: On Tue, Jul 08, 2014 at 10:51:02AM +0800, xiaofeng.yan wrote: On 2014/7/8 10:40, Li Zefan wrote: On 2014/7/8 9:10, xiaofeng.yan wrote: On 2014/7/7 16:41, Peter Zijlstra wrote: On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-08 Thread Peter Zijlstra
On Tue, Jul 08, 2014 at 10:51:02AM +0800, xiaofeng.yan wrote: > On 2014/7/8 10:40, Li Zefan wrote: > >On 2014/7/8 9:10, xiaofeng.yan wrote: > >>On 2014/7/7 16:41, Peter Zijlstra wrote: > >>>On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: > It could be wrong for the precision of

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-08 Thread Peter Zijlstra
On Tue, Jul 08, 2014 at 10:51:02AM +0800, xiaofeng.yan wrote: On 2014/7/8 10:40, Li Zefan wrote: On 2014/7/8 9:10, xiaofeng.yan wrote: On 2014/7/7 16:41, Peter Zijlstra wrote: On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be wrong for the precision of runtime and

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-08 Thread xiaofeng.yan
On 2014/7/8 15:49, Peter Zijlstra wrote: On Tue, Jul 08, 2014 at 10:51:02AM +0800, xiaofeng.yan wrote: On 2014/7/8 10:40, Li Zefan wrote: On 2014/7/8 9:10, xiaofeng.yan wrote: On 2014/7/7 16:41, Peter Zijlstra wrote: On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-07 Thread xiaofeng.yan
On 2014/7/8 10:40, Li Zefan wrote: On 2014/7/8 9:10, xiaofeng.yan wrote: On 2014/7/7 16:41, Peter Zijlstra wrote: On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be wrong for the precision of runtime and deadline when the precision is within microsecond level. For

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-07 Thread Li Zefan
On 2014/7/8 9:10, xiaofeng.yan wrote: > On 2014/7/7 16:41, Peter Zijlstra wrote: >> On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: >>> It could be wrong for the precision of runtime and deadline >>> when the precision is within microsecond level. For example: >>> Task runtime

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-07 Thread xiaofeng.yan
On 2014/7/7 16:41, Peter Zijlstra wrote: On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be wrong for the precision of runtime and deadline when the precision is within microsecond level. For example: Task runtime deadline period P1 200us 500us 500us This case

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-07 Thread Peter Zijlstra
On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: > It could be wrong for the precision of runtime and deadline > when the precision is within microsecond level. For example: > Task runtime deadline period > P1 200us 500us 500us > > This case need enbale HRTICK feature by the

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-07 Thread Peter Zijlstra
On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be wrong for the precision of runtime and deadline when the precision is within microsecond level. For example: Task runtime deadline period P1 200us 500us 500us This case need enbale HRTICK feature by the next

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-07 Thread xiaofeng.yan
On 2014/7/7 16:41, Peter Zijlstra wrote: On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be wrong for the precision of runtime and deadline when the precision is within microsecond level. For example: Task runtime deadline period P1 200us 500us 500us This case

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-07 Thread Li Zefan
On 2014/7/8 9:10, xiaofeng.yan wrote: On 2014/7/7 16:41, Peter Zijlstra wrote: On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be wrong for the precision of runtime and deadline when the precision is within microsecond level. For example: Task runtime deadline period

Re: [PATCH] sched/rt: overrun could happen in start_hrtick_dl

2014-07-07 Thread xiaofeng.yan
On 2014/7/8 10:40, Li Zefan wrote: On 2014/7/8 9:10, xiaofeng.yan wrote: On 2014/7/7 16:41, Peter Zijlstra wrote: On Fri, Jul 04, 2014 at 12:02:21PM +, xiaofeng.yan wrote: It could be wrong for the precision of runtime and deadline when the precision is within microsecond level. For