Hi, While investigating a USB performance problem, I observed the same issue as described in [1], which is that xHCI takes 10-15 times longer than EHCI to send the IN packet after received NAK - 20-30us vs. 2us. Does anyone have any comment? I am wondering if the xHCI IPD is sw configurable? Might depend on the xHCI IP revision or vendor? Thanks, -Bin. [1] https://communities.intel.com/message/228140 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
