On 7/9/19 5:38 AM, Peter Zijlstra wrote:
On Mon, Jul 08, 2019 at 07:00:08PM -0700, Ankur Arora wrote:
On 2019-06-26 12:23 p.m., Thomas Gleixner wrote:
On Wed, 26 Jun 2019, Raslan, KarimAllah wrote:
On Wed, 2019-06-26 at 10:54 -0400, Konrad Rzeszutek Wilk wrote:
There were some ideas that Anku
On Mon, Jul 08, 2019 at 07:00:08PM -0700, Ankur Arora wrote:
> On 2019-06-26 12:23 p.m., Thomas Gleixner wrote:
> > On Wed, 26 Jun 2019, Raslan, KarimAllah wrote:
> > > On Wed, 2019-06-26 at 10:54 -0400, Konrad Rzeszutek Wilk wrote:
> > > > There were some ideas that Ankur (CC-ed) mentioned to me o
also Cc Frederic,
On Tue, 9 Jul 2019 at 10:00, Ankur Arora wrote:
>
> On 2019-06-26 12:23 p.m., Thomas Gleixner wrote:
> > On Wed, 26 Jun 2019, Raslan, KarimAllah wrote:
> >> On Wed, 2019-06-26 at 10:54 -0400, Konrad Rzeszutek Wilk wrote:
> >>> There were some ideas that Ankur (CC-ed) mentioned to
On 2019-06-26 12:23 p.m., Thomas Gleixner wrote:
On Wed, 26 Jun 2019, Raslan, KarimAllah wrote:
On Wed, 2019-06-26 at 10:54 -0400, Konrad Rzeszutek Wilk wrote:
There were some ideas that Ankur (CC-ed) mentioned to me of using the perf
counters (in the host) to sample the guest and construct a b
On Wed, 26 Jun 2019, Peter Zijlstra wrote:
> On Wed, Jun 26, 2019 at 07:27:35PM +, Raslan, KarimAllah wrote:
> > On Wed, 2019-06-26 at 21:21 +0200, Peter Zijlstra wrote:
> > > On Wed, Jun 26, 2019 at 06:55:36PM +, Raslan, KarimAllah wrote:
> > >
> > > >
> > > > If the host is completely i
On Wed, Jun 26, 2019 at 07:27:35PM +, Raslan, KarimAllah wrote:
> On Wed, 2019-06-26 at 21:21 +0200, Peter Zijlstra wrote:
> > On Wed, Jun 26, 2019 at 06:55:36PM +, Raslan, KarimAllah wrote:
> >
> > >
> > > If the host is completely in no_full_hz mode and the pCPU is dedicated to
> > > a
On Wed, 26 Jun 2019, Raslan, KarimAllah wrote:
> On Wed, 2019-06-26 at 21:21 +0200, Peter Zijlstra wrote:
> > On Wed, Jun 26, 2019 at 06:55:36PM +, Raslan, KarimAllah wrote:
> >
> > >
> > > If the host is completely in no_full_hz mode and the pCPU is dedicated to
> > > a
> > > single vCPU/t
On Wed, 26 Jun 2019, Peter Zijlstra wrote:
> On Wed, Jun 26, 2019 at 06:55:36PM +, Raslan, KarimAllah wrote:
>
> > If the host is completely in no_full_hz mode and the pCPU is dedicated to a
> > single vCPU/task (and the guest is 100% CPU bound and never exits), you
> > would
> > still be
On Wed, 2019-06-26 at 21:21 +0200, Peter Zijlstra wrote:
> On Wed, Jun 26, 2019 at 06:55:36PM +, Raslan, KarimAllah wrote:
>
> >
> > If the host is completely in no_full_hz mode and the pCPU is dedicated to a
> > single vCPU/task (and the guest is 100% CPU bound and never exits), you
> > wo
On Wed, 26 Jun 2019, Raslan, KarimAllah wrote:
> On Wed, 2019-06-26 at 10:54 -0400, Konrad Rzeszutek Wilk wrote:
> > There were some ideas that Ankur (CC-ed) mentioned to me of using the perf
> > counters (in the host) to sample the guest and construct a better
> > accounting idea of what the guest
On Wed, Jun 26, 2019 at 06:55:36PM +, Raslan, KarimAllah wrote:
> If the host is completely in no_full_hz mode and the pCPU is dedicated to a
> single vCPU/task (and the guest is 100% CPU bound and never exits), you would
> still be ticking in the host once every second for housekeeping, rig
On Wed, 26 Jun 2019, Raslan, KarimAllah wrote:
> On Wed, 2019-06-26 at 20:41 +0200, Thomas Gleixner wrote:
> > The host doesn't know what the guest CPUs are doing. And if you have a full
> > zero exit setup and the guest is computing stuff or doing that network
> > offloading thing then they will n
On Wed, 2019-06-26 at 10:54 -0400, Konrad Rzeszutek Wilk wrote:
> On Wed, Jun 26, 2019 at 12:33:30PM +0200, Thomas Gleixner wrote:
> >
> > On Wed, 26 Jun 2019, Wanpeng Li wrote:
> > >
> > > After exposing mwait/monitor into kvm guest, the guest can make
> > > physical cpu enter deeper cstate thro
On Wed, 2019-06-26 at 20:41 +0200, Thomas Gleixner wrote:
> On Wed, 26 Jun 2019, Konrad Rzeszutek Wilk wrote:
> >
> > On Wed, Jun 26, 2019 at 06:16:08PM +0200, Peter Zijlstra wrote:
> > >
> > > On Wed, Jun 26, 2019 at 10:54:13AM -0400, Konrad Rzeszutek Wilk wrote:
> > > >
> > > > There were some
On Wed, 26 Jun 2019, Konrad Rzeszutek Wilk wrote:
> On Wed, Jun 26, 2019 at 06:16:08PM +0200, Peter Zijlstra wrote:
> > On Wed, Jun 26, 2019 at 10:54:13AM -0400, Konrad Rzeszutek Wilk wrote:
> > > There were some ideas that Ankur (CC-ed) mentioned to me of using the perf
> > > counters (in the host
On Wed, Jun 26, 2019 at 06:16:08PM +0200, Peter Zijlstra wrote:
> On Wed, Jun 26, 2019 at 10:54:13AM -0400, Konrad Rzeszutek Wilk wrote:
> > On Wed, Jun 26, 2019 at 12:33:30PM +0200, Thomas Gleixner wrote:
> > > On Wed, 26 Jun 2019, Wanpeng Li wrote:
> > > > After exposing mwait/monitor into kvm gu
On Wed, Jun 26, 2019 at 10:54:13AM -0400, Konrad Rzeszutek Wilk wrote:
> On Wed, Jun 26, 2019 at 12:33:30PM +0200, Thomas Gleixner wrote:
> > On Wed, 26 Jun 2019, Wanpeng Li wrote:
> > > After exposing mwait/monitor into kvm guest, the guest can make
> > > physical cpu enter deeper cstate through m
On Wed, Jun 26, 2019 at 12:33:30PM +0200, Thomas Gleixner wrote:
> On Wed, 26 Jun 2019, Wanpeng Li wrote:
> > After exposing mwait/monitor into kvm guest, the guest can make
> > physical cpu enter deeper cstate through mwait instruction, however,
> > the top command on host still observe 100% cpu u
On Wed, 26 Jun 2019, Wanpeng Li wrote:
> After exposing mwait/monitor into kvm guest, the guest can make
> physical cpu enter deeper cstate through mwait instruction, however,
> the top command on host still observe 100% cpu utilization since qemu
> process is running even though guest who has the
On Wed, Jun 26, 2019 at 05:43:55PM +0800, Wanpeng Li wrote:
> Hi all,
>
> After exposing mwait/monitor into kvm guest, the guest can make
> physical cpu enter deeper cstate through mwait instruction, however,
> the top command on host still observe 100% cpu utilization since qemu
> process is runn
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