11-30-2018, 03:34 AM
Hello,
currently i try a usb3 camera in order to evaluate the performances of such camera on the Rock64. This camera is able to supply 240 frame/sec with a resolution of 1448x1086 and it works fine on a pc; the required bandwidth for such data flow (1448x1086x240x8bits = ~2.9 Gbits/sec) is largely supported by the USB3 which allows up to ~5GBits/sec.
On the Rock64 i can get only 200 frame/sec
( ~2.4 Gbits/sec / ~300 Mo/sec) which is sufficient for my application 
, but which is also lower than what the camera can do. As i read on this forum that some users encountered problems with the "speed" of usb3 storage devices, i wonder what is at the origine of this low usb3 bandwidth of the rock64: the soc (rk3328), DRAM, the linux version i used (bionic), ...?
Regards
currently i try a usb3 camera in order to evaluate the performances of such camera on the Rock64. This camera is able to supply 240 frame/sec with a resolution of 1448x1086 and it works fine on a pc; the required bandwidth for such data flow (1448x1086x240x8bits = ~2.9 Gbits/sec) is largely supported by the USB3 which allows up to ~5GBits/sec.
On the Rock64 i can get only 200 frame/sec
( ~2.4 Gbits/sec / ~300 Mo/sec) which is sufficient for my application , but which is also lower than what the camera can do. As i read on this forum that some users encountered problems with the "speed" of usb3 storage devices, i wonder what is at the origine of this low usb3 bandwidth of the rock64: the soc (rk3328), DRAM, the linux version i used (bionic), ...?Regards
