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Date:      Fri, 11 Apr 2014 16:13:59 +0200
From:      Hans Petter Selasky <hps@selasky.org>
To:        Daniel O'Connor <doconnor@gsoft.com.au>
Cc:        freebsd-usb@freebsd.org
Subject:   Re: USB 3 devices not reliably connecting at 5Gbps
Message-ID:  <5347F8A7.1020206@selasky.org>
In-Reply-To: <ACC54FEC-2265-4861-9B2F-EEE6EDFC7857@gsoft.com.au>
References:  <A9616810-7BD9-49FC-BFA7-44206E4CCAC1@gsoft.com.au> <53478D5B.3090205@selasky.org> <ACC91511-A630-4262-AFE4-441AA154E405@gsoft.com.au> <5347BF39.2000704@selasky.org> <ACC54FEC-2265-4861-9B2F-EEE6EDFC7857@gsoft.com.au>

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On 04/11/14 12:19, Daniel O'Connor wrote:
>
> On 11 Apr 2014, at 19:38, Hans Petter Selasky <hps@selasky.org> wrote:
>> On 04/11/14 09:29, Daniel O'Connor wrote:
>>> 	    usb_xf[i].xf = libusb_alloc_transfer(0);
>>> 	    usb_xf[i].idx = i;
>>> 	    usb_xf[i].done = 0;
>>> 	    usb_xf[i].submitted = 0;
>>
>> I think you can get more speed in libusb:
>
>>                 bufsize = 16384;
>>
>> ^^^ add a clause for super-speed to use 32K/64K here:
>
> I think that only applies to libusb 0.1 - I am using the 1.0 API.
>

Hi,

Try this patch. I'm pretty sure you can get +256
MByte/second using LibUSB too.

http://svnweb.freebsd.org/changeset/base/264344

--HPS



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