Let me share my performance report after applying the patches for the information:
1. live mlx VF migration outgoing migration: +------------------+---------------+---------------+----------------+ | VF(s) number | 1 | 2 | 4 | +------------------+---------------+---------------+----------------+ | Memory bandwidth | 733.693 MiB/s | 556.565 MiB/s | 475.310 MiB/s | | Total downtime | 227ms | 358ms | 460ms | +------------------+---------------+---------------+----------------+ incoming migration: +------------------+---------------+---------------+----------------+ | VF(s) number | 1 | 2 | 4 | +------------------+---------------+---------------+----------------+ | Memory bandwidth | 738.758 MiB/s | 566.175 MiB/s | 458.936 MiB/s | | Total downtime | 220ms | 342ms | 459ms | +------------------+---------------+---------------+----------------+ 2. live mlx VF multifd migration outgoing migration: +------------------+---------------+----------------+ | VF(s) number | 1 | 1 | +------------------+---------------+----------------+ | Channel | 4 | 6 | | Memory bandwidth | 786.942 MiB/s | 848.362 MiB/s | | Total downtime | 142ms | 188ms | +------------------+---------------+----------------+ +------------------+----------------+---------------+----------------+ | VF(s) number | 2 | 2 | 2 | +------------------+----------------+---------------+----------------+ | Channel | 4 | 6 | 8 | | Memory bandwidth | 774.315 MiB/s | 831.938 MiB/s | 769.799 MiB/s | | Total downtime | 160ms | 178ms | 156ms | +------------------+----------------+---------------+----------------+ +------------------+----------------+---------------+----------------+ | VF(s) number | 4 | 4 | 4 | +------------------+----------------+---------------+----------------+ | Channel | 6 | 8 | 16 | | Memory bandwidth | 715.210 MiB/s | 742.962 MiB/s | 747.188 MiB/s | | Total downtime | 180ms | 219ms | 190ms | +------------------+----------------+---------------+----------------+ incoming migration: +------------------+---------------+----------------+ | VF(s) number | 1 | 1 | +------------------+---------------+----------------+ | Channel | 4 | 6 | | Memory bandwidth | 807.958 MiB/s | 859.525 MiB/s | | Total downtime | 150ms | 177ms | +------------------+---------------+----------------+ +------------------+---------------+---------------+----------------+ | VF(s) number | 2 | 2 | 2 | +------------------+---------------+---------------+----------------+ | Channel | 4 | 6 | 8 | | Memory bandwidth | 768.104 MiB/s | 825.462 MiB/s | 791.582 MiB/s | | Total downtime | 170ms | 185ms | 175ms | +------------------+---------------+---------------+----------------+ +------------------+---------------+---------------+----------------+ | VF(s) number | 4 | 4 | 4 | +------------------+---------------+---------------+----------------+ | Channel | 6 | 8 | 16 | | Memory bandwidth | 706.921 MiB/s | 750.706 MiB/s | 746.295 MiB/s | | Total downtime | 174ms | 193ms | 191ms | +------------------+---------------+---------------+----------------+ Best Regards, Yanghang Liu On Mon, Feb 3, 2025 at 10:20β―PM CΓ©dric Le Goater <c...@redhat.com> wrote: > > Hello Maciej, > > > This patch set is targeting QEMU 10.0. > > > > What's not yet present is documentation update under docs/devel/migration > > but I didn't want to delay posting the code any longer. > > Such doc can still be merged later when the design is 100% finalized. > The changes are quite complex, the design is not trivial, the benefits are > not huge as far as we know. I'd rather have the doc update first please. > > Thanks, > > C. > > >
