Re: Performance issues as KVM guest?

2018-01-15 Thread Tom Smyth
Hello, Just to clarify Todds / Stefans Email earlier in the chain, (Thanks Stefan and Todd,) disable kvm_intel.preemption_timer on the host (see \ > /sys/module/kvm_intel/parameters/preemption_timer ) This seems to be buggy in > linux \ > 4.10 and newer disabling intel-kvm preemption_timer

Re: Performance issues as KVM guest?

2018-01-15 Thread Infoomatic
12. Januar 2018 um 12:48 Uhr > Von: "Stefan Fritsch" <s...@sfritsch.de> > An: Infoomatic <infooma...@gmx.at> > Cc: misc@openbsd.org > Betreff: Re: Performance issues as KVM guest? > > Hi, I don't see this issue on my Debian system, but please try two thin

Re: Performance issues as KVM guest?

2018-01-12 Thread Tom Smyth
Hello Todd, This issue (Virtual hardware issue happens on latest proxmox5.x but not on Proxmox 4.4 ) with 6.2 (and 6.1 for that matter) It is discussed here https://marc.info/?l=openbsd-misc=151472854021947=2 but in recent versions of Proxmox 5.1 (QEMU/KVM) there were no console freezes

Re: Performance issues as KVM guest?

2018-01-12 Thread Stefan Fritsch
@krot.org> > > An: misc@openbsd.org > > Betreff: Re: Performance issues as KVM guest? > > > > * Kent Watsen [2018-01-11 17:38]: > > [...] > > > > > Since my hosting provider https://www.bytemark.co.uk/cloud-hosting/ > > > > > patched for

Re: Performance issues as KVM guest?

2018-01-12 Thread Infoomatic
018 um 20:32 Uhr > Von: "Kirill Miazine" <k...@krot.org> > An: misc@openbsd.org > Betreff: Re: Performance issues as KVM guest? > > * Kent Watsen [2018-01-11 17:38]: > [...] > > > > Since my hosting provider https://www.bytemark.co.uk/cloud-hosting/ >

Re: Performance issues as KVM guest?

2018-01-11 Thread Kirill Miazine
* Kent Watsen [2018-01-11 17:38]: [...] > > > Since my hosting provider https://www.bytemark.co.uk/cloud-hosting/ > > > patched for Meltdown last weekend I'm seeing significant performance > > > issues with an OpenBSD virtual instance there. It seems okay after a > > > fresh reboot but then

Re: Performance issues as KVM guest?

2018-01-11 Thread Todd C. Miller
This sounds like the same issue as was described here: https://marc.info/?l=openbsd-bugs=151430928212450=2 - todd

Re: Performance issues as KVM guest?

2018-01-11 Thread Mike Larkin
On Thu, Jan 11, 2018 at 05:38:18PM +, Kent Watsen wrote: > On 1/10/18 1:53 PM, Mike Larkin wrote: > > On Wed, Jan 10, 2018 at 03:51:19PM +, Mark Carroll wrote: > > > Since my hosting provider https://www.bytemark.co.uk/cloud-hosting/ > > > patched for Meltdown last weekend I'm seeing

Re: Performance issues as KVM guest?

2018-01-11 Thread Kent Watsen
On 1/10/18 1:53 PM, Mike Larkin wrote: On Wed, Jan 10, 2018 at 03:51:19PM +, Mark Carroll wrote: Since my hosting provider https://www.bytemark.co.uk/cloud-hosting/ patched for Meltdown last weekend I'm seeing significant performance issues with an OpenBSD virtual instance there. It seems

Re: Performance issues as KVM guest?

2018-01-10 Thread Mark Carroll
On 10 Jan 2018, Mike Larkin wrote: > On Wed, Jan 10, 2018 at 03:51:19PM +, Mark Carroll wrote: (snip) >> I wondered, is anybody else seeing significant performance problems with >> OpenBSD (or other BSDs) virtual instances since Meltdown patching? Is >> there anything to tweak at my end or am

Re: Performance issues as KVM guest?

2018-01-10 Thread Mike Larkin
On Wed, Jan 10, 2018 at 03:51:19PM +, Mark Carroll wrote: > Since my hosting provider https://www.bytemark.co.uk/cloud-hosting/ > patched for Meltdown last weekend I'm seeing significant performance > issues with an OpenBSD virtual instance there. It seems okay after a > fresh reboot but then

Performance issues as KVM guest?

2018-01-10 Thread Mark Carroll
Since my hosting provider https://www.bytemark.co.uk/cloud-hosting/ patched for Meltdown last weekend I'm seeing significant performance issues with an OpenBSD virtual instance there. It seems okay after a fresh reboot but then progressively returns to being very slow: for example "sleep 1" may