[QUESTION] bulk out performance

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Hi,

I use g_zero(f_sourcesink configuration) as test device and omap3 musb
as UDC, the result
of usbtest testcase 5(bulk out) only have ~8MB/s, but testcase 6(bulk
in) can reach ~24MB/sec.
Why is there so much difference between bulk out and bulk in transfer?

Thanks!

-- 
Lei Ming
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