I found the cause of the problem.
The tap interface of a instance has small tx length 500 packets. At a high
network load (15-25 Kpps) and high CPU load on a guest some times queue
overflows and the tap interface start drop network packages. I think that queue
overflow occurs in moments of mic
apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323631/+files/ProcInterrupts.txt
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apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323628/+files/Lspci.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323626/+files/CurrentDmesg.txt
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apport information
** Tags added: apport-collected trusty
** Description changed:
I use qemu-kvm in openstak. On highload hypervisor tap interface of
net-highload gues drops many TX packages.
Network options of qemu-system-x86_64 "... -netdev
tap,fd=30,id=hostnet0,vhost=on,vhostfd=31 -dev
apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323629/+files/Lsusb.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323630/+files/ProcCpuinfo.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323632/+files/ProcModules.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323633/+files/UdevDb.txt
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apport information
** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323627/+files/IwConfig.txt
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apport information
** Attachment added: "UdevLog.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323634/+files/UdevLog.txt
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https://bugs.launchpad.net/bugs/1423
apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1423631/+attachment/4323635/+files/WifiSyslog.txt
** Changed in: qemu-kvm (Ubuntu)
Status: New => Incomplete
** Changed in: qemu-kvm (Ubuntu)
Status: Incomplete => Confirmed
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