On Tue, Aug 24, 2010 at 01:01:38PM -1000, Zachary Amsden wrote:
With this patchset, KVM now has a much stronger guarantee: If you have
old guest software running on broken hardware, using SMP virtual
machines, you do not get hardware performance and error-free time
virtualization.However,
On 08/25/2010 06:55 AM, Marcelo Tosatti wrote:
On Tue, Aug 24, 2010 at 01:01:38PM -1000, Zachary Amsden wrote:
With this patchset, KVM now has a much stronger guarantee: If you have
old guest software running on broken hardware, using SMP virtual
machines, you do not get hardware
On 08/23/10 23:47, Zachary Amsden wrote:
I've heard the rumor that TSC is orders of magnitude faster under VMware
than under KVM from three people now, and I thought you were part of
that camp.
Needless to say, they are either laughably incorrect, or possess some
great secret knowledge of
On 08/24/2010 03:32 AM, David S. Ahern wrote:
On 08/23/10 23:47, Zachary Amsden wrote:
I've heard the rumor that TSC is orders of magnitude faster under VMware
than under KVM from three people now, and I thought you were part of
that camp.
Needless to say, they are either laughably
On Thu, Aug 19, 2010 at 10:07:14PM -1000, Zachary Amsden wrote:
This patch set implements full TSC virtualization, with both
trapping and passthrough modes, and intelligent mode switching.
As a result, TSC will never go backwards, we are stable against
guest re-calibration attempts, VM reset,
On 08/24/2010 12:13 PM, Marcelo Tosatti wrote:
On Thu, Aug 19, 2010 at 10:07:14PM -1000, Zachary Amsden wrote:
This patch set implements full TSC virtualization, with both
trapping and passthrough modes, and intelligent mode switching.
As a result, TSC will never go backwards, we are stable
On 08/21/2010 03:32 PM, David S. Ahern wrote:
On 08/20/10 17:24, Zachary Amsden wrote:
On 08/20/2010 03:26 AM, David S. Ahern wrote:
On 08/20/10 02:07, Zachary Amsden wrote:
This patch set implements full TSC virtualization, with both
trapping and passthrough modes, and
On 08/23/10 19:44, Zachary Amsden wrote:
I have also looked at time keeping and performance of getimeofday on a
certain proprietary hypervisor. KVM lags severely here and workloads
dependent on timestamps are dramatically impacted. Evaluations and
decisions are made today based on current
On 08/23/2010 05:04 PM, David S. Ahern wrote:
On 08/23/10 19:44, Zachary Amsden wrote:
I have also looked at time keeping and performance of getimeofday on a
certain proprietary hypervisor. KVM lags severely here and workloads
dependent on timestamps are dramatically impacted. Evaluations
On 08/20/10 17:24, Zachary Amsden wrote:
On 08/20/2010 03:26 AM, David S. Ahern wrote:
On 08/20/10 02:07, Zachary Amsden wrote:
This patch set implements full TSC virtualization, with both
trapping and passthrough modes, and intelligent mode switching.
As a result, TSC will never go
This patch set implements full TSC virtualization, with both
trapping and passthrough modes, and intelligent mode switching.
As a result, TSC will never go backwards, we are stable against
guest re-calibration attempts, VM reset, and migration. For guests
which require it, the TSC khz can even be
On 08/20/10 02:07, Zachary Amsden wrote:
This patch set implements full TSC virtualization, with both
trapping and passthrough modes, and intelligent mode switching.
As a result, TSC will never go backwards, we are stable against
guest re-calibration attempts, VM reset, and migration. For
On 08/20/2010 03:26 AM, David S. Ahern wrote:
On 08/20/10 02:07, Zachary Amsden wrote:
This patch set implements full TSC virtualization, with both
trapping and passthrough modes, and intelligent mode switching.
As a result, TSC will never go backwards, we are stable against
guest
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