On Mon, Dec 19, 2016 at 07:37:30PM +0100, Stefan Priebe - Profihost AG wrote: > Am 19.12.2016 um 12:03 schrieb Stefan Hajnoczi: > > On Fri, Dec 16, 2016 at 10:00:36PM +0100, Stefan Priebe - Profihost AG > > wrote: > >> > >> Am 15.12.2016 um 07:46 schrieb Alexandre DERUMIER: > >>> does rollbacking the kernel to previous version fix the problem ? > >> > >> The culprit is the used tuned agent from Redhat > >> (https://github.com/redhat-performance/tuned). The used profile > >> virtual-host results in these problems. Stopping tuned or using another > >> profile like throughput-performance everything is fine again. > > > > Interesting discovery. Have you filed a bug report about it? > > As we're not using RHEL, nor CentOS i didn't expect this to make sense > ;-) I just believed that something in the kernel changed.
I see. At least the tuned maintainers are aware of it now. If others report the same problem maybe it can be solved. Thanks! Stefan > >> after upgrading a cluster OS, Qemu, ... i'm experiencing slow and > >> volatile network speeds inside my VMs. > >> > >> Currently I've no idea what causes this but it's related to the host > >> upgrades. Before i was running Qemu 2.6.2. > >> > >> I'm using virtio for the network cards. > > > > Stefan > >
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