Re: [PATCH 0/1] Forced-wakeup for stop lite states on Powernv

2019-05-16 Thread Gautham R Shenoy
Hi Nicholas, On Thu, May 16, 2019 at 04:13:17PM +1000, Nicholas Piggin wrote: > > > The motivation behind this patch was a HPC customer issue where they > > were observing some CPUs in the core getting stuck at stop0_lite > > state, thereby lowering the performance on the other CPUs of the core

Re: [PATCH 0/1] Forced-wakeup for stop lite states on Powernv

2019-05-15 Thread Nicholas Piggin
Gautham R Shenoy's on May 16, 2019 3:36 pm: > Hello Nicholas, > > > On Thu, May 16, 2019 at 02:55:42PM +1000, Nicholas Piggin wrote: >> Abhishek's on May 13, 2019 7:49 pm: >> > On 05/08/2019 10:29 AM, Nicholas Piggin wrote: >> >> Abhishek Goel's on April 22, 2019 4:32 pm: >> >>> Currently, the cp

Re: [PATCH 0/1] Forced-wakeup for stop lite states on Powernv

2019-05-15 Thread Gautham R Shenoy
Hello Nicholas, On Thu, May 16, 2019 at 02:55:42PM +1000, Nicholas Piggin wrote: > Abhishek's on May 13, 2019 7:49 pm: > > On 05/08/2019 10:29 AM, Nicholas Piggin wrote: > >> Abhishek Goel's on April 22, 2019 4:32 pm: > >>> Currently, the cpuidle governors determine what idle state a idling CPU >

Re: [PATCH 0/1] Forced-wakeup for stop lite states on Powernv

2019-05-15 Thread Nicholas Piggin
Abhishek's on May 13, 2019 7:49 pm: > On 05/08/2019 10:29 AM, Nicholas Piggin wrote: >> Abhishek Goel's on April 22, 2019 4:32 pm: >>> Currently, the cpuidle governors determine what idle state a idling CPU >>> should enter into based on heuristics that depend on the idle history on >>> that CPU. G

Re: [PATCH 0/1] Forced-wakeup for stop lite states on Powernv

2019-05-13 Thread Abhishek
On 05/08/2019 10:29 AM, Nicholas Piggin wrote: Abhishek Goel's on April 22, 2019 4:32 pm: Currently, the cpuidle governors determine what idle state a idling CPU should enter into based on heuristics that depend on the idle history on that CPU. Given that no predictive heuristic is perfect, ther

Re: [PATCH 0/1] Forced-wakeup for stop lite states on Powernv

2019-05-07 Thread Nicholas Piggin
Abhishek Goel's on April 22, 2019 4:32 pm: > Currently, the cpuidle governors determine what idle state a idling CPU > should enter into based on heuristics that depend on the idle history on > that CPU. Given that no predictive heuristic is perfect, there are cases > where the governor predicts a