RE: [PATCH 0/9] sched_clock fixes

2017-04-26 Thread Lofstedt, Marta
> <rafael.j.wyso...@intel.com>; martin.pe...@linux.intel.com; > pasha.tatas...@oracle.com; daniel.vet...@ffwll.ch > Subject: Re: [PATCH 0/9] sched_clock fixes > > On Tue, Apr 25, 2017 at 09:31:40AM +, Lofstedt, Marta wrote: > > Hi Peterz, > > > > I tes

RE: [PATCH 0/9] sched_clock fixes

2017-04-26 Thread Lofstedt, Marta
; daniel.vet...@ffwll.ch > Subject: Re: [PATCH 0/9] sched_clock fixes > > On Tue, Apr 25, 2017 at 09:31:40AM +, Lofstedt, Marta wrote: > > Hi Peterz, > > > > I tested your patch-set on the same Core2 machine as where we > discovered the regression. > >

Re: [PATCH 0/9] sched_clock fixes

2017-04-25 Thread Peter Zijlstra
On Tue, Apr 25, 2017 at 09:31:40AM +, Lofstedt, Marta wrote: > Hi Peterz, > > I tested your patch-set on the same Core2 machine as where we discovered the > regression. > With the tsc=unstable boot param that passrate has improved significantly; > 350 fails -> 15 fails. So is that the

Re: [PATCH 0/9] sched_clock fixes

2017-04-25 Thread Peter Zijlstra
On Tue, Apr 25, 2017 at 09:31:40AM +, Lofstedt, Marta wrote: > Hi Peterz, > > I tested your patch-set on the same Core2 machine as where we discovered the > regression. > With the tsc=unstable boot param that passrate has improved significantly; > 350 fails -> 15 fails. So is that the

RE: [PATCH 0/9] sched_clock fixes

2017-04-25 Thread Lofstedt, Marta
om>; martin.pe...@linux.intel.com; > pasha.tatas...@oracle.com; pet...@infradead.org; daniel.vet...@ffwll.ch > Subject: [PATCH 0/9] sched_clock fixes > > Hi, > > These patches were inspired (and hopefully fix) two independent bug > reports on > Core2 machines. > >

RE: [PATCH 0/9] sched_clock fixes

2017-04-25 Thread Lofstedt, Marta
e.com; pet...@infradead.org; daniel.vet...@ffwll.ch > Subject: [PATCH 0/9] sched_clock fixes > > Hi, > > These patches were inspired (and hopefully fix) two independent bug > reports on > Core2 machines. > > I never could quite reproduce one, but my Core2 machine no

[PATCH 0/9] sched_clock fixes

2017-04-21 Thread Peter Zijlstra
Hi, These patches were inspired (and hopefully fix) two independent bug reports on Core2 machines. I never could quite reproduce one, but my Core2 machine no longer switches to stable sched_clock and therefore no longer tickles the problematic stable -> unstable transition either. Before I dug

[PATCH 0/9] sched_clock fixes

2017-04-21 Thread Peter Zijlstra
Hi, These patches were inspired (and hopefully fix) two independent bug reports on Core2 machines. I never could quite reproduce one, but my Core2 machine no longer switches to stable sched_clock and therefore no longer tickles the problematic stable -> unstable transition either. Before I dug