On 11/27/20 3:36 AM, Zeyu Jin wrote: Meta-comment: you appear to be having problems threading your series; I've now seen three separate cover letters (RFC v1, v2 with no subject, v2 with subject) and two series where each patch was a separate thread. It is difficult to follow which messages are related when reading in a mail client that sorts by most-recently-active thread first. You may want to investigate why your threading is not working, although I'd wait to send v3 until you have actual changes to incorporate.
> Currently we have both multi-thread compression and multifd to optimize > live migration in Qemu. Mulit-thread compression deals with the situation > where network bandwith is limited but cpu resource adequate. Multifd instead Not that typos in the cover letter matter, but this should be 'bandwidth' > aims to take full advantage of network bandwith. Moreover it supports both > zlib and zstd compression on each channel. > > In this patch series, we did some code refactoring on multi-thread compression > live migration and bring zstd compression method support for it. > > Below is the test result of multi-thread compression live migration > with different compress methods. Test result shows that zstd outperforms > zlib by about 70%. > -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
