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[Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets
From: |
cargonza |
Subject: |
[Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic |
Date: |
Wed, 16 Mar 2016 13:27:24 -0000 |
apologize but I was corrected that for qemu issues. The bug should be in
the following:
Distribution: ubuntu
package: qemu <--instead of project.
I will correct this in the bug.
** Project changed: qemu => qemu (Ubuntu)
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https://bugs.launchpad.net/bugs/1556306
Title:
vhost-user: qemu stops processing packets under high load of traffic
Status in qemu package in Ubuntu:
New
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
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