Re: cpuidle and cpufreq coupling?

2017-07-20 Thread Florian Fainelli
On 07/20/2017 05:11 PM, Vikram Mulukutla wrote: > On 7/20/2017 3:56 PM, Florian Fainelli wrote: >> On 07/20/2017 07:45 AM, Peter Zijlstra wrote: > > > >>> >>> Can your ARM part change OPP without scheduling? Because (for obvious >>> reasons) the idle thread is not supposed to block. >> >> I thin

Re: cpuidle and cpufreq coupling?

2017-07-20 Thread Vikram Mulukutla
On 7/20/2017 3:56 PM, Florian Fainelli wrote: On 07/20/2017 07:45 AM, Peter Zijlstra wrote: Can your ARM part change OPP without scheduling? Because (for obvious reasons) the idle thread is not supposed to block. I think it should be able to do that, but I am not sure that if I went throu

Re: cpuidle and cpufreq coupling?

2017-07-20 Thread Florian Fainelli
On 07/20/2017 02:23 AM, Sudeep Holla wrote: > > > On 20/07/17 08:18, Viresh Kumar wrote: >> On 20-07-17, 01:17, Rafael J. Wysocki wrote: >>> On Thu, Jul 20, 2017 at 12:54 AM, Florian Fainelli >>> wrote: Hi, We have a particular ARM CPU design that is drawing quite a lot of c

Re: cpuidle and cpufreq coupling?

2017-07-20 Thread Florian Fainelli
On 07/20/2017 07:45 AM, Peter Zijlstra wrote: > On Thu, Jul 20, 2017 at 11:52:41AM +0200, Rafael J. Wysocki wrote: >> On Thu, Jul 20, 2017 at 9:18 AM, Viresh Kumar >> wrote: >>> On 20-07-17, 01:17, Rafael J. Wysocki wrote: On Thu, Jul 20, 2017 at 12:54 AM, Florian Fainelli wrote:

Re: cpuidle and cpufreq coupling?

2017-07-20 Thread Peter Zijlstra
On Thu, Jul 20, 2017 at 11:52:41AM +0200, Rafael J. Wysocki wrote: > On Thu, Jul 20, 2017 at 9:18 AM, Viresh Kumar wrote: > > On 20-07-17, 01:17, Rafael J. Wysocki wrote: > >> On Thu, Jul 20, 2017 at 12:54 AM, Florian Fainelli > >> wrote: > >> > Hi, > >> > > >> > We have a particular ARM CPU des

Re: cpuidle and cpufreq coupling?

2017-07-20 Thread Rafael J. Wysocki
On Thu, Jul 20, 2017 at 9:18 AM, Viresh Kumar wrote: > On 20-07-17, 01:17, Rafael J. Wysocki wrote: >> On Thu, Jul 20, 2017 at 12:54 AM, Florian Fainelli >> wrote: >> > Hi, >> > >> > We have a particular ARM CPU design that is drawing quite a lot of >> > current upon exit from WFI, and it does s

Re: cpuidle and cpufreq coupling?

2017-07-20 Thread Sudeep Holla
On 20/07/17 08:18, Viresh Kumar wrote: > On 20-07-17, 01:17, Rafael J. Wysocki wrote: >> On Thu, Jul 20, 2017 at 12:54 AM, Florian Fainelli >> wrote: >>> Hi, >>> >>> We have a particular ARM CPU design that is drawing quite a lot of >>> current upon exit from WFI, and it does so in a way even b

Re: cpuidle and cpufreq coupling?

2017-07-20 Thread Viresh Kumar
On 20-07-17, 01:17, Rafael J. Wysocki wrote: > On Thu, Jul 20, 2017 at 12:54 AM, Florian Fainelli > wrote: > > Hi, > > > > We have a particular ARM CPU design that is drawing quite a lot of > > current upon exit from WFI, and it does so in a way even before the > > first instruction out of WFI is

Re: cpuidle and cpufreq coupling?

2017-07-19 Thread Rafael J. Wysocki
On Thu, Jul 20, 2017 at 12:54 AM, Florian Fainelli wrote: > Hi, > > We have a particular ARM CPU design that is drawing quite a lot of > current upon exit from WFI, and it does so in a way even before the > first instruction out of WFI is executed. That means we cannot influence > directly the exi

cpuidle and cpufreq coupling?

2017-07-19 Thread Florian Fainelli
Hi, We have a particular ARM CPU design that is drawing quite a lot of current upon exit from WFI, and it does so in a way even before the first instruction out of WFI is executed. That means we cannot influence directly the exit from WFI other than by changing the state in which it would be previ