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Re: [vfio-users] Speed tips requested



On Sun, 2017-03-26 at 22:12 +0100, Patrick O'Callaghan wrote:
> No-one has commented on the keyboard overrun issue I asked about.
> That's really more noticeable at this stage than file I/O. I moved the
> wireless hub to a USB-3 port and again it may have made a slight
> difference, but some stuttering still occurs, i.e. holding down a key
> will quite quickly (say 5 seconds ballpark) fill the input buffer and
> generate an audio buzz.

Just to follow up: I did a simple test (which I wish I'd though of
earlier) by just running Notepad under Windows and holding down a key
for a long time. No stuttering was observed.

IOW, the problem doesn't appear to be related to USB events or buffer
overruns. It most likely comes down to the disk I/O issue after all and
the stuttering is caused by the lag in fetching new graphical content.

poc


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