On Mon, 13 Jan 2014 01:33:30 -0800 (PST) [email protected] wrote: > суббота, 11 января 2014 г., 23:23:58 UTC+4 пользователь Siarhei Siamashka > написал: > > > Well, you can't claim that these are the "default manufacturer > > settings" when you are seriously overclocking your hardware. > > when i mean "default manufacturer settings" i mean there is no any > overclocking or kernel modifications, i just cant compile it with DRAM > settings from manufacturer, even if CPU at 816Mhz
One possible explanation could be that your hardware has already suffered some sort of a permanent damage as a result of your overclocking and overvolting experiments. > > The nominal maximum clock frequency of Allwinner-A10 CPU > > is 1008MHz. And so far I have not heard of any successful > > overclocking higher than 1.15GHz. > > for overclocking higher than 1.15Ghz, kernel voltage must be > increased above 1.5v(1.55v for 1.2Ghz), just nobody tried to do this Nobody is just as reckless as you are ;) At default 1GHz, the CPU is already clocked very close to its limits, without leaving much of a safety headroom. > >Do you really need something like extra > > ~20% of performance that much? > > as my device is not battery powered, i want it work as faster as > it possible without compromising stability, gcc compilation just > shows me that it can handle prolonged heavy load without failures There are surely heavier prolonged loads than gcc compilation. For example video transcoding. You can try to do the following test, which stresses the CPU even more: $ wget https://raw2.github.com/ssvb/cpuburn-arm/master/cpuburn-a8.S $ arm-linux-gnueabihf-gcc -o cpuburn-a8 cpuburn-a8.S And then run the resulting binary 'cpuburn-a8' on your device. If you could also monitor the temperature and/or the current draw, that would be really awesome. > > For Gentoo I would just suggest to buy some other quad-core ARM > > Cortex-A9 or Cortex-A15 board and use it as a build machine. > > i prefer to use distcc to speedup build time Well, this makes your crazy overclocking even less justified. -- 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/groups/opt_out.
