[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [Bug 1470720] Re: high IRQ-TLB generates network interrupti
From: |
Launchpad Bug Tracker |
Subject: |
[Qemu-devel] [Bug 1470720] Re: high IRQ-TLB generates network interruptions |
Date: |
Tue, 21 Aug 2018 04:17:29 -0000 |
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1470720
Title:
high IRQ-TLB generates network interruptions
Status in QEMU:
Expired
Bug description:
we are having a problem in our hosts, all the vm running on them
suddenly, and for some seconds, lost network connectivity.
the root cause appears to be the increase of irb-tlb from low values
(less than 20) to more than >100k, that spike only last for some
seconds then everything goes back to normal
i've upload an screenshot of collectd for one hypervisor here
http://zumbi.com.ar/tmp/irq-tlb.png
we have hosts running precise (qemu 1.5, ovs 2.0.2, libvirt 1.2.2 and kernel
3.13) where the issue is frequent. also we have an small % of our fleet running
trusty (qemu 2.0.0 ovs 2.0.2 libvirt 1.2.2 and kernel 3.16) where the problem
seemed to be nonexistent until today
issue seems to be isolated to < 10% of our hypervisors, some hypervisors had
this problem every few days, others only once or twice. our vm are a black box
to us we don't know what users run on them, but mostly cpu and network bound
workload.
most of our guests run centos 6.5 (kernel 2.6.32)
vm are bridged to a linuxbridge then veth wired to an ovs switch
(neutron openvswitch agent setup)
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1470720/+subscriptions
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Qemu-devel] [Bug 1470720] Re: high IRQ-TLB generates network interruptions,
Launchpad Bug Tracker <=