[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[ChristianEhrhardt]

Hi,
cleaning up old issues.
In all the time we had no confirmed report on trusty, also as serge outlined in 
c#19 the backport would be much harder and therefore carry more risk for the 
SRU.
Since wily was haniging in verification so long and now is EOD this is dead.

I'm cleaning up the bug states to match that accordingly.

** Changed in: qemu (Ubuntu Wily)
   Status: Fix Committed => Won't Fix

** Changed in: qemu (Ubuntu Trusty)
   Status: New => Invalid

** Changed in: qemu (Ubuntu Trusty)
   Status: Invalid => Won't Fix

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

The wily SRU has been waiting for validation for quite some time.  I'm
wondering whether that is because noone is using wily, or because it's
not high priority?

The patch does not apply cleanly to trusty.  In particular, the chunk in
./hw/net/vhost_net.c.rej is quite obsolete in the trusty source.  So I'd
like to hear from someone that they are hitting this before risking an
erroneous backport.

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Brian Murray]

Hello Vincent, or anyone else affected,

Accepted qemu into wily-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/qemu/1:2.3+dfsg-
5ubuntu9.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: qemu (Ubuntu Wily)
   Status: New => Fix Committed

** Tags added: verification-needed

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Brian Murray]

Hello Vincent, or anyone else affected,

Accepted qemu into wily-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/qemu/1:2.3+dfsg-
5ubuntu9.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: qemu (Ubuntu Wily)
   Status: New => Fix Committed

** Tags added: verification-needed

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

** Description changed:

+ [SRU Justification]
+ Impact: qemu stops processing traffic
+ Test case: see below (stress test using udp traffic generator)
+ Fix: cherrypick of upstream patch to fix this problem.
+ 
  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
+   http://lists.nongnu.org/archive/html/qemu-devel/2015-12/msg00652.html

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

** Description changed:

+ [SRU Justification]
+ Impact: qemu stops processing traffic
+ Test case: see below (stress test using udp traffic generator)
+ Fix: cherrypick of upstream patch to fix this problem.
+ 
  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
+   http://lists.nongnu.org/archive/html/qemu-devel/2015-12/msg00652.html

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

Actually even porting to trusty is complicated by a set of endianness
patches.

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

Actually even porting to trusty is complicated by a set of endianness
patches.

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

This is marked as affecting precise, but has anyone reproduced this with
qemu-kvm 1.0+noroms-0ubuntu14.27 ?

The patch is completely inapplicable to that code base, so it would need
to be rewritten from scratch if so.


** Changed in: qemu-kvm (Ubuntu Precise)
   Status: New => Invalid

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

(if someone says they have reproduced it on 1.0+noroms-0ubuntu14.27 I'll
unmark it invalid.)

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

(if someone says they have reproduced it on 1.0+noroms-0ubuntu14.27 I'll
unmark it invalid.)

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

This is marked as affecting precise, but has anyone reproduced this with
qemu-kvm 1.0+noroms-0ubuntu14.27 ?

The patch is completely inapplicable to that code base, so it would need
to be rewritten from scratch if so.


** Changed in: qemu-kvm (Ubuntu Precise)
   Status: New => Invalid

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Vincent JARDIN]

Great, thanks for your ack't of the update being available for ppc.

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Vincent JARDIN]

Great, thanks for your ack't of the update being available for ppc.

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

** Also affects: qemu (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: qemu-kvm (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: qemu (Ubuntu Precise)
   Importance: Undecided
   Status: New

** Also affects: qemu-kvm (Ubuntu Precise)
   Importance: Undecided
   Status: New

** Also affects: qemu (Ubuntu Wily)
   Importance: Undecided
   Status: New

** Also affects: qemu-kvm (Ubuntu Wily)
   Importance: Undecided
   Status: New

** No longer affects: qemu (Ubuntu Precise)

** No longer affects: qemu-kvm (Ubuntu Trusty)

** No longer affects: qemu-kvm (Ubuntu Wily)

** Changed in: qemu (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: qemu (Ubuntu Wily)
   Importance: Undecided => High

** Changed in: qemu-kvm (Ubuntu Precise)
   Importance: Undecided => High

** Changed in: qemu-kvm (Ubuntu)
   Status: Confirmed => Fix Released

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

** Also affects: qemu (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: qemu-kvm (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: qemu (Ubuntu Precise)
   Importance: Undecided
   Status: New

** Also affects: qemu-kvm (Ubuntu Precise)
   Importance: Undecided
   Status: New

** Also affects: qemu (Ubuntu Wily)
   Importance: Undecided
   Status: New

** Also affects: qemu-kvm (Ubuntu Wily)
   Importance: Undecided
   Status: New

** No longer affects: qemu (Ubuntu Precise)

** No longer affects: qemu-kvm (Ubuntu Trusty)

** No longer affects: qemu-kvm (Ubuntu Wily)

** Changed in: qemu (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: qemu (Ubuntu Wily)
   Importance: Undecided => High

** Changed in: qemu-kvm (Ubuntu Precise)
   Importance: Undecided => High

** Changed in: qemu-kvm (Ubuntu)
   Status: Confirmed => Fix Released

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Re: [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

Quoting Vincent JARDIN (vincent.jar...@6wind.com):
> it seems that the fix was not applied on ppc build:
>
> https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842754
>
> https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842753
> 
> neither on arm64:
>   https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842750

Hi,

that is an old version.  See 
https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu6
and
https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu6/+build/9361116/+files/buildlog_ubuntu-xenial-arm64.qemu_1%3A2.5+dfsg-5ubuntu6_BUILDING.txt.gz

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Re: [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

Quoting Vincent JARDIN (vincent.jar...@6wind.com):
> it seems that the fix was not applied on ppc build:
>
> https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842754
>
> https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842753
> 
> neither on arm64:
>   https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842750

Hi,

that is an old version.  See 
https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu6
and
https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu6/+build/9361116/+files/buildlog_ubuntu-xenial-arm64.qemu_1%3A2.5+dfsg-5ubuntu6_BUILDING.txt.gz

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[cargonza]

It should also be fixed in the qemu-kvm package. No additional bug
needed as this bug covers both qemu and qemu-kvm packages.

Sergey - any chance you can also push the patch into the qemu-kvm
package?

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[cargonza]

It should also be fixed in the qemu-kvm package. No additional bug
needed as this bug covers both qemu and qemu-kvm packages.

Sergey - any chance you can also push the patch into the qemu-kvm
package?

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

Thanks for reporting this bug.  I'll push into the xenial package today.

** Changed in: qemu (Ubuntu)
   Importance: Undecided => High

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Launchpad Bug Tracker]

This bug was fixed in the package qemu - 1:2.5+dfsg-5ubuntu6

---
qemu (1:2.5+dfsg-5ubuntu6) xenial; urgency=medium

  * Cherrypick upstream patch vhost-user-interrupt-management-fixes.patch
(LP: #1556306)

 -- Serge Hallyn   Wed, 16 Mar 2016 16:35:22
-0700

** Changed in: qemu (Ubuntu)
   Status: Confirmed => Fix Released

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

** Also affects: qemu-kvm (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: qemu-kvm (Ubuntu)
   Status: New => Confirmed

** Changed in: qemu-kvm (Ubuntu)
   Importance: Undecided => High

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Vincent JARDIN]

it seems that the fix was not applied on ppc build:
   https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842754
   https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842753

neither on arm64:
  https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842750

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Vincent JARDIN]

it seems that the fix was not applied on ppc build:
   https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842754
   https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842753

neither on arm64:
  https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-1ubuntu3/+build/8842750

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   vhost-user: qemu stops processing packets under high load of traffic

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: qemu (Ubuntu)
   Status: New => Confirmed

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Launchpad Bug Tracker]

This bug was fixed in the package qemu - 1:2.5+dfsg-5ubuntu6

---
qemu (1:2.5+dfsg-5ubuntu6) xenial; urgency=medium

  * Cherrypick upstream patch vhost-user-interrupt-management-fixes.patch
(LP: #1556306)

 -- Serge Hallyn   Wed, 16 Mar 2016 16:35:22
-0700

** Changed in: qemu (Ubuntu)
   Status: Confirmed => Fix Released

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: qemu (Ubuntu)
   Status: New => Confirmed

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Vincent JARDIN]

Side question, will you apply it to qemu-kvm from
  
https://launchpad.net/~ubuntu-cloud-archive/+archive/ubuntu/mitaka-staging/+files/qemu-kvm_2.5+dfsg-5ubuntu5~cloud0_amd64.deb
too?

or should I open another bug?

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[cargonza]

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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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Vincent JARDIN]

Side question, will you apply it to qemu-kvm from
  
https://launchpad.net/~ubuntu-cloud-archive/+archive/ubuntu/mitaka-staging/+files/qemu-kvm_2.5+dfsg-5ubuntu5~cloud0_amd64.deb
too?

or should I open another bug?

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   vhost-user: qemu stops processing packets under high load of traffic

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

** Also affects: qemu-kvm (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: qemu-kvm (Ubuntu)
   Status: New => Confirmed

** Changed in: qemu-kvm (Ubuntu)
   Importance: Undecided => High

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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[cargonza]

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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[Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic

[Serge Hallyn]

Thanks for reporting this bug.  I'll push into the xenial package today.

** Changed in: qemu (Ubuntu)
   Importance: Undecided => High

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