Hi Siarhei,
I reprogrammed my thermal meter to get realtime data instead of measure
temperature every 4s.
And collected more data ~(45,80). I stopped at 80, because I am afraid that
it could actually burn the chip!
The temperature hangs around at about 45 when frequency is 30MHz and system
idle.
b =[
-263.2669
0.1281
]
<https://lh6.googleusercontent.com/-YfPXOU1vBxE/U6CdpwLONbI/AAAAAAAABx8/8yEEnsuAo6k/s1600/res.png>
On Wednesday, June 18, 2014 12:27:30 AM UTC+8, Siarhei Siamashka wrote:
>
>
> Thanks a lot! This really helps and the data is perfectly presented.
> Based on this data, looks like the steps are the same 1/10 degree as
> on A20, but just with a different starting offset.
>
> However the temperature range seems a bit too low (just changing from
> ~48 degrees to ~54 degrees). Have you used the cpuburn-a8 program
> during the test? It should increase the current draw almost up to 1A
> when running at 1GHz and the temperature should rise very quickly. I
> would have expected that the temperature would swing in a much wider
> range (up to at least ~70 degrees). If just cpuburn-a8 alone is
> not enough and you are using the sunxi-3.4 kernel, then you can
> additionally stress the Mali GPU by using the 'textured-cube'
> program from
> https://github.com/ssvb/lima-memtester/
> Just run the 'build-textured-cube-static-binary.sh' script to
> compile it.
>
> Using a wider temperature range in the data set should improve the
> accuracy.
>
> And if this is still not enough, then we also have G2D and CedarX
> hardware units, which could be also stressed :) All of this can
> increase the power consumption really a lot. This is one of the
> reasons why having properly working temperature sensor makes a lot
> of sense. Sooner or later, the mainline kernel must implement a
> thermal throttling support.
>
> --
> Best regards,
> Siarhei Siamashka
>
--
You received this message because you are subscribed to the Google Groups
"linux-sunxi" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
