Performance regression with virtio_net

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



I'm seeing a performance regression with virtio_net that looks to have
started in 4.12-rc1. I only see it in one context though, downloading
snap packages from the Ubuntu snap store. For example:

 https://api.snapcraft.io/api/v1/snaps/download/b8X2psL1ryVrPt5WEmpYiqfr5emixTd7_1797.snap

which redirects to Internap's CDN. Normally this downloads in a few
seconds at ~10 MB/s, but with 4.12 and 4.13 it takes minutes with a rate
of ~150 KB/s. Everything else I've tried downloads as normal speeds.

I bisected this to 680557cf79f8 "virtio_net: rework mergeable buffer
handling". If I revert this on top of 4.13-rc2 (along with other changes
needed to successfully revert it) speeds return to normal.

Thanks,
Seth
_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization



[Index of Archives]     [KVM Development]     [Libvirt Development]     [Libvirt Users]     [CentOS Virtualization]     [Netdev]     [Ethernet Bridging]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux