What is max sustained USB 3.0 speed achieved?

[amuresan]

When NXP created this chip, they characterized all peripherals.

What is the maximum sustained speed that the USB 3.0 actually achieved and which drivers were used?

[joanxie]

response from NXP Technical Support Services that said it was a USB / xHCI performance issue. The best we can do with USB 3.0 right now is 150-170 MB/s on all iMX6 & iMX8 platforms. They proposed to request their Professional Services in order to optimize USB 3.0 throughput.

[amuresan]

USB 3 is used by everyone.

You’re basically asking every single company to pay to unlock faster USB speeds. 

The ROCK64 chip can do 384MBytes/sec and it’s $35

[amuresan]

What exactly is the performance bottleneck?

the ROCK64 chip is $35 and it can do almost the full 3.2gbps that is practically achievable. 

So what is the bottleneck that NXP cannot overcome?