qemu-devel
[Top][All Lists]
Advanced

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

[Qemu-devel] [Bug 1556306] [NEW] vhost-user: qemu stops processing packe


From: Vincent JARDIN
Subject: [Qemu-devel] [Bug 1556306] [NEW] vhost-user: qemu stops processing packets under high load of traffic
Date: Fri, 11 Mar 2016 22:44:29 -0000

Public bug reported:

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

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: 6wind

-- 
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

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



reply via email to

[Prev in Thread] Current Thread [Next in Thread]