I�m currently porting an application from windows to linux. The software
read a stream of data coming from a custom device. The USB chip used is
a FTDI USB-Serial.

I�m using libusb 0.1.7 with a RedHat 9.0 distribution. My problem is how
to configure usb_bulk_read, to guarantee a good performance (timeout,
packet size).

For example, the Windows software is acquiring (custom) packets at 900
Hz.
The linux implementation under RH8 or RH9 with a timeout of 100 and a
buffer size of 4098 is 500 Hz. These parameters do not work under some
other linux distribution.

How to guarantee that the usb_bulk_read parameters are working at
maximum speed?



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