Hi Bastien, On 9/8/2022 2:38 PM, Hans de Goede wrote: > Hi, > > On 9/7/22 17:35, Bastien Nocera wrote: >> On Wed, 7 Sept 2022 at 16:35, Hans de Goede <hdegoede@xxxxxxxxxx> wrote: >>> >>> Hi Bastien, >>> >>> On 9/7/22 16:24, Bastien Nocera wrote: >>>> Hey Shyam, >>>> >>>> I misunderstood that CnQF was a single setting, but it looks like it >>>> has 4 different levels, right? >>>> Unless there's a major malfunction, I don't think that offering to >>>> switch between 2 different policies where the difference is how >>>> "static" the performance boosts are is very useful, or comprehensible, >>>> to end-users. >>>> >>>> If CnQF only has a single "on" setting, then this could replace the >>>> balanced mode for what you call "static slider", so the end-user can >>>> still make a choice and have agency on whether the system tries to >>>> save power, or increase performance. >>>> >>>> If CnQF has multiple levels (Turbo, Performance, Balanced and Quiet, >>>> right?), then I don't think it's useful to have a sysfs setting to >>>> switch it at runtime, which only confuses user-space and the users. >>>> BIOS setting and/or kernel command-line option are the way to go. >>>> >>>> Did I understand this correctly? >>> >>> Let me try clarify things: >>> >>> CnQF has 4 levels internally, between which it switches automatically >>> based on the workload of the last 5 minutes. >> >> Oh, those profiles are internal only, OK. Do those automated levels >> behave like the "static slider" ones, to the point of being >> indistinguishable? So for example, does the static slider >> "performance" behave like "CnQF" if the machine was heavily loaded >> machine for 5 minutes? > > This is more of a question for AMD to answer. But yes I believe that > the CnQF internal performance mode which it boosts to if the machine > is heavily loaded for 5 minutes is similar to the static slider > performance setting. Its a kind of "yes". But its still dependent on how the OEMs have tuned the power profiling values and mapped it to the relavant CnQF modes. Thanks, Shyam > > Regards, > > Hans >
