[Nouveau] [RFC PATCH v2 0/7] stabilize kepler reclocking

[Karol Herbst]

> Thomas Martitz <kugel at rockbox.org> hat am 31. Dezember 2015 um 10:56
> geschrieben:
> 
> Am 31. Dezember 2015 03:54:43 MEZ, schrieb Karol Herbst
> <nouveau at karolherbst.de>:
> >> Thomas Martitz <kugel at rockbox.org> hat am 30. Dezember 2015 um 23:53
> >> geschrieben:
> >> 
> >> Am 25.12.2015 um 18:43 schrieb Pierre Moreau:
> >> > Hello,
> >> >
> >> > Maybe my e-mail client is messing with me, but I couldn't find any
> >dmesg
> >> > output
> >> > attached to your e-mail. Could you please try to attach it again?
> >> >
> >> > By the way, since you have a Kepler, you should try booting with
> >> > "nouveau.War00C800_0=1". That workaround is enabled by default in
> >4.4-rc5
> >> > (IIRC), but that might not be the case on Karol's branch.
> >> >
> >> > Best regards,
> >> > Pierre
> >> >
> >> 
> >> I did not find that parameter under /sys/module/nouveau/parameters. 
> >> Google led me to try nouveau.config=War00C800_0=1 instead.
> >> 
> >> Anyway, I added both to the kernel cmdline. Unfortunately it made no 
> >> difference. Dota 2 still freezes up the system pretty much
> >immediately 
> >> (when 0f pstate is in use).
> >
> >well so that means that it doesn't freeze when not using 0f?
> >
> 
> That's right.
> 
> >I suspect that nouveau currently just sets the voltage too low, but
> >this is
> >another issue
> >and this issue will be tackled next year.
> >
> >You could replace info.min with info.max in
> >drm/nouveau/nvkm/subdev/volt/base.c:nvkm_volt_map
> >but this will result in more heat generated by your gpu and nouveau
> >currently
> >does not verifies if the
> >ovearheating protection is setup sanely (though it should be setup
> >already by
> >the gpu itself)
> >
> 
> What's your recommendation to determine suitable values? I could try the
> binary driver under Linux or win10. Under win10 I know some tools (e.g. msi
> afterburner). Note that I know next to nothing about the Kepler architecture
> itself, just the basic voltage-frequency-temperature interactions.
> 

I think we somehow know already, there isn't much we need anymore for this. It's
just to get all the stuff right now. I think if we are fast we can get it fully
working
in the first quarter of next year. There are just some annoying bits to be find
out regarding the power sensors (we have to stay within the power budgets of the
gpus, which is kind of important).
And before that's done everything else is on hold, but everything else is pretty
much ready.

> >Just keep an eye open on sensors while testing this.
> >
> 
> What's your recommendation here to continously read temperature data under
> nouveau?
> 

sensors, it is a command which displays sensor data

> Best regards

>