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Re: [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing pac
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic |
Date: |
Sat, 12 Mar 2016 22:05:00 +0200 |
On Fri, Mar 11, 2016 at 10:51:33PM -0000, Vincent JARDIN wrote:
> for tracking,
>
> http://git.qemu.org/?p=qemu.git;a=patch;h=5669655aafdb88a8797c74a989dd0c0ebb1349fa
>
> --
> You received this bug notification because you are a member of qemu-
> devel-ml, which is subscribed to QEMU.
> https://bugs.launchpad.net/bugs/1556306
>
> Title:
> vhost-user: qemu stops processing packets under high load of traffic
>
> Status in QEMU:
> New
I presume you'll also close this bu at some point?
It's fixed in upstream QEMU.
> Bug description:
> Description of problem:
> - qemu socket becomes full, causing qemu to send incomplete
> SET_VRING_CALL messages to vhost-user backend (without proper fd set in
> ancillary data).
> - after some time, some interrupts are lost, causing the VM to stop
> transmitting packets.
>
> How reproducible:
> Run a stress tests of a vhost-user interface using an UDP
> traffic generator. Traffic generator (IXIA) was connected to 2 physical
> ports that are in turn connected to 2 virtio ports through a linux bridge, VM
> (running linux) doing routing to forward packets between the 2 virtio ports.
> When traffic reaches high pps rates of small packets,
>
> Actual results:
> - VM stop transmitting packets
>
> Expected results:
> - VM should never stop transmitting packets
>
> Additional info:
> We do propose a fix at:
> http://lists.nongnu.org/archive/html/qemu-devel/2015-12/msg00652.html
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/1556306/+subscriptions
- [Qemu-devel] [Bug 1556306] [NEW] vhost-user: qemu stops processing packets under high load of traffic, Vincent JARDIN, 2016/03/11
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, Vincent JARDIN, 2016/03/11
- Re: [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic,
Michael S. Tsirkin <=
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, Vincent JARDIN, 2016/03/14
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, Vincent JARDIN, 2016/03/14
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, cargonza, 2016/03/16
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, cargonza, 2016/03/16