Re: [Qemu-devel] [PATCH v6 1/2] kvm: support -overcommit cpu-pm=on|off

2018-06-27 Thread Eduardo Habkost
On Fri, Jun 22, 2018 at 10:22:05PM +0300, Michael S. Tsirkin wrote: > With this flag, kvm allows guest to control host CPU power state. This > increases latency for other processes using same host CPU in an > unpredictable way, but if decreases idle entry/exit times for the > running VCPU, so to u

Re: [Qemu-devel] [PATCH v6 1/2] kvm: support -overcommit cpu-pm=on|off

2018-06-27 Thread Eduardo Habkost
On Tue, Jun 26, 2018 at 06:16:24PM +0300, Michael S. Tsirkin wrote: > On Tue, Jun 26, 2018 at 05:13:18PM +0200, Igor Mammedov wrote: > > On Tue, 26 Jun 2018 17:06:12 +0300 > > "Michael S. Tsirkin" wrote: > > > > > On Mon, Jun 25, 2018 at 11:40:12AM +0200, Igor Mammedov wrote: > > > > On Fri, 22 J

Re: [Qemu-devel] [PATCH v6 1/2] kvm: support -overcommit cpu-pm=on|off

2018-06-26 Thread Michael S. Tsirkin
On Tue, Jun 26, 2018 at 05:13:18PM +0200, Igor Mammedov wrote: > On Tue, 26 Jun 2018 17:06:12 +0300 > "Michael S. Tsirkin" wrote: > > > On Mon, Jun 25, 2018 at 11:40:12AM +0200, Igor Mammedov wrote: > > > On Fri, 22 Jun 2018 22:22:05 +0300 > > > "Michael S. Tsirkin" wrote: > > > > > > > With

Re: [Qemu-devel] [PATCH v6 1/2] kvm: support -overcommit cpu-pm=on|off

2018-06-26 Thread Igor Mammedov
On Tue, 26 Jun 2018 17:06:12 +0300 "Michael S. Tsirkin" wrote: > On Mon, Jun 25, 2018 at 11:40:12AM +0200, Igor Mammedov wrote: > > On Fri, 22 Jun 2018 22:22:05 +0300 > > "Michael S. Tsirkin" wrote: > > > > > With this flag, kvm allows guest to control host CPU power state. This > > > increa

Re: [Qemu-devel] [PATCH v6 1/2] kvm: support -overcommit cpu-pm=on|off

2018-06-26 Thread Michael S. Tsirkin
On Mon, Jun 25, 2018 at 11:40:12AM +0200, Igor Mammedov wrote: > On Fri, 22 Jun 2018 22:22:05 +0300 > "Michael S. Tsirkin" wrote: > > > With this flag, kvm allows guest to control host CPU power state. This > > increases latency for other processes using same host CPU in an > > unpredictable way

Re: [Qemu-devel] [PATCH v6 1/2] kvm: support -overcommit cpu-pm=on|off

2018-06-25 Thread Igor Mammedov
On Fri, 22 Jun 2018 22:22:05 +0300 "Michael S. Tsirkin" wrote: > With this flag, kvm allows guest to control host CPU power state. This > increases latency for other processes using same host CPU in an > unpredictable way, but if decreases idle entry/exit times for the > running VCPU, so to use

[Qemu-devel] [PATCH v6 1/2] kvm: support -overcommit cpu-pm=on|off

2018-06-22 Thread Michael S. Tsirkin
With this flag, kvm allows guest to control host CPU power state. This increases latency for other processes using same host CPU in an unpredictable way, but if decreases idle entry/exit times for the running VCPU, so to use it QEMU needs a hint about whether host CPU is overcommitted, hence the f