> From: Michal Nazarewicz [mailto:m...@google.com] On Behalf Of Michal > Nazarewicz > Sent: Wednesday, October 31, 2012 1:10 PM > > On Wed, Oct 31 2012, Paul Zimmerman wrote: > > Regarding that, would you guys accept a patch that adds the "buflen" > > module parameter to the mass-storage gadget? Without increasing the > > buffer length above 16K, it's impossible to approach the max throughput > > allowed by SuperSpeed hosts. > > I have no problem with that. But did you try setting up 4 buffers? you > can set number of buffers g_{file,mass}_storage uses with config > USB_GADGET_STORAGE_NUM_BUFFERS (or if you select USB_GADGET_DEBUG_FILES > you get a fsg_num_buffers module parameter).
Yeah, I tried that, but it didn't have much effect. Whereas increasing num_buffers to 4 and buffer length to 128K gives a large improvement, from less than 200 MB/s to about 290 MB/s. -- Paul
