The running time with vulkan in jetson nano is much slower than yours

[twmht]

Trying to run benchncnn in jetson nano (Jetpack 4.6) with vulkan.

ncnn version is latest.

But the running time is much slower than yours

Here are my result

Any idea?

[nihui]

the data is collected from Tencent/ncnn#3485

https://qengineering.eu/install-ncnn-on-jetson-nano.html
Note, during the test the Jetson Nano CPU was overclocked to 2014.5 MHz and the GPU to 998.4 MHz.

[Qengineering]

There are several options to maximize the performance of the benchmark.
There are several options to maximize the performance of the benchmark.
First, wait 10 minutes after boot up. It gives Ubuntu (Tegra) the time to do all the administrative tasks like looking for updates etc.
Second, set the power to 10 Watts, something you've probably already done.
Thirdly, set all the governors at performance.

$ sudo echo "performance" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
$ sudo echo "performance" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
$ sudo echo "performance" > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
$ sudo echo "performance" > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor

You can temporarily shut down the graphic stack or start overclocking. Both methods are not used here.
The results with a Jetson Nano 4 GB running at a normal clock speed of 1479 MHz CPU and 921.6 MHz GPU.