USB CDC performance test

[Mithran B]

Hello,

In Host and Gadget systems, enabled the USB CDC drivers.
Then nodes are created as /dev/ttyAcm0 and /dev/ttyGs0.
Then opened the nodes and write and read back the data.
It is working.

I want to test the performance of this interface and drivers.
Do we have any utility for this?
How to do the performance test?

-Thanks.
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