ALLWINNER A64 BENCHMARK DRIVER
ALLWINNER A64 BENCHMARK PRO

Stock voltage is 1.30V, just shy of the 1.35V maximum outlined in the datasheet. Does not seem to overclock at stock voltages at all, defaults to 408 MHz if it fails to set a clock rate. CPU clock rates are inside opp_table0 as hexadecimal numbers in the opp-hz field.Д¬heck the achieved clock speed with sudo cat /sys/kernel/debug/clk/clk_summary | grep armclk. The stock speed for the little cores is 1.4GHz and on the big cores it is 1.8GHz, the OP1 speeds default to 1.5GHz and 2.0GHz instead.ДTB is in /boot/dtbs/rockchip/rk3328-rock64.dtb.

ALLWINNER A64 BENCHMARK PRO

Segfault has found that the RK3399 in his Pinebook Pro can reach 1.7GHz on the little cores and 2.08GHz on the big ones. The highest recommended voltage for the little cores is 1.2V and for the big cores is 1.25V. The maximum limit is 1.8GHz on the little cores and 2.2GHz on the big cores. These clock speeds can be added to cluster0_opp for the small cores and cluster1_opp for the big cores respectively. Note that the GPU in the RK3399 is already bottlenecked by the memory bandwidth available to it, so overclocking generally yields no improvements.ДЄ set of available clock speeds that can be added to the CPU clusters can be found in drivers/clk/rockchip/clk-rk3399.c under rk3399_cpuclkl_rates for the little cores and rk3399_cpuclkb_rates for the big cores. Segfault has found that the RK3399 in his Pinebook Pro can reach 950MHz on the GPU while being stable.

The highest recommended voltage for the GPU is 1.2V as specified in the RK3399 schematic from Rockchip. These include a slight overclock and undervolt, they are intended for the OP1 CPU found in many chromebooks but have worked fine in all recorded cases on regular RK3399 SOCs in other devices.ДЄny clock speeds can be added for the GPU in gpu_opp_table More optimised voltages and clocks can be found in arch/arm64/boot/dts/rockchip/rk3399-op1-opp.dtsi The RK3399 clocks are found in arch/arm64/boot/dts/rockchip/rk3399-opp.dtsi I'm (33yn2) not particularly sure if this makes any difference, or if it might infact have a negative impact. In order to compile boot.scr you can run mkimage -C none -A arm64 -T script -d boot.cmd boot.scr By default the kernel allocates only 64MB, and the maximum value is 256MB. In order to allocate more VRAM for the GPU you can add cma=256 to your kernel (or use kconfig with CONFIG_CMA_SIZE_MBYTES=256) cmdline in boot.scr which you will have to compile using mkimage. You can find simple instructions on doing so here: Uboot VPU Setting the DRAM clock is accomplished by modifying pinephone_defconfig in uboot ( )

ALLWINNER A64 BENCHMARK DRIVER

It is possible that by reverse engineering the DRAM driver from allwinner that auto tuning can be accomplished to get the best performance. Arch Linux Arm uses a default clockspeed of 552MHz, with uboot builds available to easily switch out for a higher (624) or lower (492) DRAM clockspeed. This may be unstable on your device however.ДЄround 600 MHz (PC-1200) should work fine, however some people have reported instability at lower clockspeeds. The A64's maximum ram clockspeed falls just short of 667MHz. When overclocking the GPU, it is a good idea to also overclock the DRAM, as the main bottleneck of the A64 SOC is the memory. Make sure to set your DRAM to a multiple of 24. You can simply use a text editor to do so.Дtc -I dts -O dtb /boot/dtbs/allwinner/sun50i-a64-pinephone-1.2.dts -o /boot/dtbs/allwinner/sun50i-a64-pinephone-1.2.dtbДЄfterwards you can simply reboot and check with sudo cat /sys/kernel/debug/clk/clk_summary to see if the changes have correctly applied. dts file and change the clockspeeds you wish to modify. Once you've found the file, you can run the following command to convert the DTB to DTS:Дtc -I dtb -O dts /boot/dtbs/allwinner/sun50i-a64-pinephone-1.2.dtb -o /boot/dtbs/allwinner/sun50i-a64-pinephone-1.2.dtsДЇinally, modify the newly converted. You will want to select the correct file for your pinephone (Only choose 1.1 if you have a braveheart, As all other consumer pinephones use the 1.2 DTS).

You will see sun50i-a64-pinephone-1.2.dtb, and also two other files with different pinephone mainboard revisions (1.1 and 1.0).

In order to overclock the Pinephone you will have to first convert the DTB file in /boot/dtbs/allwinner/ to a DTS file. These instructions are targeting the Pinephone to simplify the explanation, however they can be used to also overclock other devices such as the Pinetab if you modify the proper DTB files.

Allwinner a64 benchmark