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From: | Til Obes |
Subject: | Re: [Qemu-devel] Performance of USB2.0 |
Date: | Thu, 05 Jan 2012 17:29:37 +0100 |
User-agent: | Mozilla/5.0 (Windows NT 5.1; rv:8.0) Gecko/20111105 Thunderbird/8.0 |
Hello. Am 01.11.2011 10:37, schrieb Gerd Hoffmann:
I think the main issue here is that we don't do buffering / pipelining for bulk transfers at the moment. We grab a single transfer request from the guest, pass it to the kernel, when it is done pass it back to the guest, then look look for the next one. Instead we could queue up all transfer requests from the guest to the kernel, which would give a noticable better throughput. The qemu usb subsystem can't handle that (yet). Fixing that is one the TODO list though.
Any news about this topic? Regards Til
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