speed of USB3.0 by streamer

[Anonymous]

 Hi!

   

I use streamer to read data from USB bord(3014). if I select 256 packets per xfer the speed can arrive at 320MBps. however after I detect the data I found that I lost some data. but if I select 8 packets or smaller the speed can arrive at 260MBps. but I can receive all the data. 

   

So I want to ask that why I lost data with the larger number of packets per xfer.

   

many thanks!

   

dekui 

[Anonymous]

What is the endpoint type being tested?

   

How are you checking the data loss i.e. are you dumping it to a file and checking or are you observing it in CATC and checking?

   

Regards,

   

Anand

[Anonymous]

I am testing  the speed of usb3.0 in the streamer.when I set packets per xfer = 256 ,the failure=1,why?You can get it from img.