[winswitch] Using Xpra on multi-GPU laptops

Antoine Martin antoine at nagafix.co.uk
Fri Nov 11 18:09:43 GMT 2011

> Here's the current release: http://youtu.be/b7pEEErvnAI
> Still can't figure out how to increase screen updates.
I have just added support for mmap memory transfers in svn:
Since your server and client are on the same machine, you can take
advantage of this to get a higher refresh rate (and lower CPU usage)
with "--enable-mmap" on both client and server.

Testing with various fast screen updating workloads showed a CPU load
reduction of 20% to 50% for the xpra process.

The next step will be to dynamically tune the damage batching to keep
the mmap buffer (almost) full at all times, in the meantime you probably
want to reduce it yourself, ie:
or even turn batching off completely:


> - Eric
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