From: Eduardo Habkost <ehabkost@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel@nongnu.org, kvm@vger.kernel.org,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH v4 2/2] i386/cpu: make -cpu host support monitor/mwait
Date: Fri, 22 Jun 2018 15:35:16 -0300 [thread overview]
Message-ID: <20180622183516.GC7451@localhost.localdomain> (raw)
In-Reply-To: <20180622003140.164613-3-mst@redhat.com>
On Fri, Jun 22, 2018 at 03:31:48AM +0300, Michael S. Tsirkin wrote:
> When guest CPU PM is enabled, and with -cpu host, expose the host CPU
> MWAIT leaf in the CPUID so guest can make good PM decisions.
>
> Note: the result is 100% CPU utilization reported by host as host
> no longer knows that the CPU is halted.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
--
Eduardo
WARNING: multiple messages have this Message-ID (diff)
From: Eduardo Habkost <ehabkost@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: qemu-devel@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>,
Marcelo Tosatti <mtosatti@redhat.com>,
kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [PATCH v4 2/2] i386/cpu: make -cpu host support monitor/mwait
Date: Fri, 22 Jun 2018 15:35:16 -0300 [thread overview]
Message-ID: <20180622183516.GC7451@localhost.localdomain> (raw)
In-Reply-To: <20180622003140.164613-3-mst@redhat.com>
On Fri, Jun 22, 2018 at 03:31:48AM +0300, Michael S. Tsirkin wrote:
> When guest CPU PM is enabled, and with -cpu host, expose the host CPU
> MWAIT leaf in the CPUID so guest can make good PM decisions.
>
> Note: the result is 100% CPU utilization reported by host as host
> no longer knows that the CPU is halted.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
--
Eduardo
next prev parent reply other threads:[~2018-06-22 18:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-22 0:31 [PATCH v4 0/2] kvm: limited x86 CPU power management Michael S. Tsirkin
2018-06-22 0:31 ` [Qemu-devel] " Michael S. Tsirkin
2018-06-22 0:31 ` [PATCH v4 2/2] i386/cpu: make -cpu host support monitor/mwait Michael S. Tsirkin
2018-06-22 0:31 ` [Qemu-devel] " Michael S. Tsirkin
2018-06-22 18:35 ` Eduardo Habkost [this message]
2018-06-22 18:35 ` Eduardo Habkost
2018-06-22 0:31 ` [PATCH v4 1/2] kvm: support -overcommit cpu-pm=on|off Michael S. Tsirkin
2018-06-22 0:31 ` [Qemu-devel] " Michael S. Tsirkin
2018-06-22 18:22 ` Eduardo Habkost
2018-06-22 18:22 ` [Qemu-devel] " Eduardo Habkost
2018-06-22 18:42 ` Michael S. Tsirkin
2018-06-22 18:42 ` [Qemu-devel] " Michael S. Tsirkin
2018-06-22 18:34 ` Eduardo Habkost
2018-06-22 18:34 ` [Qemu-devel] " Eduardo Habkost
2018-06-22 19:10 ` Michael S. Tsirkin
2018-06-22 19:10 ` [Qemu-devel] " Michael S. Tsirkin
2018-06-22 3:01 ` [PATCH v4 0/2] kvm: limited x86 CPU power management no-reply
2018-06-22 3:01 ` [Qemu-devel] " no-reply
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