ping!
On 30.08.2017 18:23, Denis Plotnikov wrote:
V5:
It was decided to split the series
"make L2's kvm-clock stable, get rid of pvclock_gtod_copy in KVM"
into two parts to make the changes finer grained:
1. get rid of pvclock_gtod_copy in KVM
2. make L2's kvm-cl
ping!
On 30.08.2017 18:23, Denis Plotnikov wrote:
V5:
It was decided to split the series
"make L2's kvm-clock stable, get rid of pvclock_gtod_copy in KVM"
into two parts to make the changes finer grained:
1. get rid of pvclock_gtod_copy in KVM
2. make L2's kvm-cl
The field keeps monotonic time since boot.
The value of boot will be used in KVM for masterclock.
This is a part of the work aiming to move to a more simple scheme
of masterclock related values calculation in KVM
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
include
The field keeps monotonic time since boot.
The value of boot will be used in KVM for masterclock.
This is a part of the work aiming to move to a more simple scheme
of masterclock related values calculation in KVM
Signed-off-by: Denis Plotnikov
---
include/linux/timekeeping.h | 2 ++
kernel
be redundant because
the current scheme doesn't need to update any shadow timekeeper
data structure (pvclock_gtod_copy) every time the timekeeper does
changes. The notifier has been left unremoved intentionally and its
replacing with something else is the matter of future work.
Signed-off-by: Denis Plotnikov
be redundant because
the current scheme doesn't need to update any shadow timekeeper
data structure (pvclock_gtod_copy) every time the timekeeper does
changes. The notifier has been left unremoved intentionally and its
replacing with something else is the matter of future work.
Signed-off-by: Denis Plotnikov
The callback provides extended information about just read
clocksource value.
It's going to be used in cases when detailed system information
needed for further time related values calculation, e.g in KVM
masterclock settings calculation.
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.
The callback provides extended information about just read
clocksource value.
It's going to be used in cases when detailed system information
needed for further time related values calculation, e.g in KVM
masterclock settings calculation.
Signed-off-by: Denis Plotnikov
---
include/linux
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
include/linux/timekeeping.h | 3 +++
kernel/time/timekeeping.c | 13 +++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 5008e3e..528d088
Signed-off-by: Denis Plotnikov
---
include/linux/timekeeping.h | 3 +++
kernel/time/timekeeping.c | 13 +++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 5008e3e..528d088 100644
--- a/include/linux
.
Removing the leftovers of the old scheme is the matter of the next patches.
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
arch/x86/kvm/x86.c | 26 ++
1 file changed, 18 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm
.
Removing the leftovers of the old scheme is the matter of the next patches.
Signed-off-by: Denis Plotnikov
---
arch/x86/kvm/x86.c | 26 ++
1 file changed, 18 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 05a5e57..0e86729 100644
By doing that, add tsc clocksource to a list of KVM clocksources
providing valid cycle values, meaning that KVM can use its masterclock.
This is a part of the work aiming to move to a more simple scheme of
masterclock related values calculation in KVM.
Signed-off-by: Denis Plotnikov <dplo
, which means making
L2 stable when running over stable L1 kvm-clock
Denis Plotnikov (6):
timekeeper: introduce extended clocksource reading callback
timekeeper: introduce boot field in system_time_snapshot
timekeeper: use the extended reading function on snapshot acquiring
tsc: implem
By doing that, add tsc clocksource to a list of KVM clocksources
providing valid cycle values, meaning that KVM can use its masterclock.
This is a part of the work aiming to move to a more simple scheme of
masterclock related values calculation in KVM.
Signed-off-by: Denis Plotnikov
---
arch
, which means making
L2 stable when running over stable L1 kvm-clock
Denis Plotnikov (6):
timekeeper: introduce extended clocksource reading callback
timekeeper: introduce boot field in system_time_snapshot
timekeeper: use the extended reading function on snapshot acquiring
tsc: implem
On 24.08.2017 11:00, Paolo Bonzini wrote:
On 23/08/2017 18:02, Paolo Bonzini wrote:
More duct tape would have been just:
- if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC)
+ mode = READ_ONCE(pvclock_gtod_data.clock.vclock_mode);
+ if (mode != VCLOCK_TSC &&
+
On 24.08.2017 11:00, Paolo Bonzini wrote:
On 23/08/2017 18:02, Paolo Bonzini wrote:
More duct tape would have been just:
- if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC)
+ mode = READ_ONCE(pvclock_gtod_data.clock.vclock_mode);
+ if (mode != VCLOCK_TSC &&
+
ping!
On 02.08.2017 20:11, Paolo Bonzini wrote:
On 02/08/2017 18:49, John Stultz wrote:
On Wed, Aug 2, 2017 at 7:38 AM, Denis Plotnikov
<dplotni...@virtuozzo.com> wrote:
V4:
* removed "is stable" function with vague definition of stability
there is the only function
ping!
On 02.08.2017 20:11, Paolo Bonzini wrote:
On 02/08/2017 18:49, John Stultz wrote:
On Wed, Aug 2, 2017 at 7:38 AM, Denis Plotnikov
wrote:
V4:
* removed "is stable" function with vague definition of stability
there is the only function which does time with cycle sta
Since, KVM has been switched to getting masterclock related data
right from the timekeeper by the previous patches, now we are able
to remove all the parts related to the old scheme of getting
masterclock data.
This patch removes those parts.
Signed-off-by: Denis Plotnikov <dplo
Since, KVM has been switched to getting masterclock related data
right from the timekeeper by the previous patches, now we are able
to remove all the parts related to the old scheme of getting
masterclock data.
This patch removes those parts.
Signed-off-by: Denis Plotnikov
---
arch/x86/include
about
critical changes happened in the underlying timekeeper.
This is a final related to the timekeeper patch of the work aiming
to move to a more simple scheme of masterclock related values
calculation in KVM.
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
include
about
critical changes happened in the underlying timekeeper.
This is a final related to the timekeeper patch of the work aiming
to move to a more simple scheme of masterclock related values
calculation in KVM.
Signed-off-by: Denis Plotnikov
---
include/linux/cs_notifier.h | 17
.
Removing the leftovers of the old scheme is the matter of the next patches.
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
arch/x86/kvm/x86.c | 26 ++
1 file changed, 18 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm
The parameters is a pointer which is used to store cycles and flags
stamp value used for time calulation on pvclock reading.
This is a part of the work aiming to make possible to use KVM
masterclock in L2 guests (those once running over kvmclock clocksource).
Signed-off-by: Denis Plotnikov
.
Removing the leftovers of the old scheme is the matter of the next patches.
Signed-off-by: Denis Plotnikov
---
arch/x86/kvm/x86.c | 26 ++
1 file changed, 18 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6c97c82..d8ec2ca 100644
The parameters is a pointer which is used to store cycles and flags
stamp value used for time calulation on pvclock reading.
This is a part of the work aiming to make possible to use KVM
masterclock in L2 guests (those once running over kvmclock clocksource).
Signed-off-by: Denis Plotnikov
kvm-clock
Denis Plotnikov (10):
timekeeper: introduce extended clocksource reading callback
timekeeper: introduce boot field in system_time_snapshot
timekeeper: use the extended reading function on snapshot acquiring
tsc: implement the extended tsc reading function
KVM: x86: switch to m
kvm-clock
Denis Plotnikov (10):
timekeeper: introduce extended clocksource reading callback
timekeeper: introduce boot field in system_time_snapshot
timekeeper: use the extended reading function on snapshot acquiring
tsc: implement the extended tsc reading function
KVM: x86: switch to m
The field keeps monotonic time since boot.
The value of boot will be used in KVM for masterclock.
This is a part of the work aiming to move to a more simple scheme
of masterclock related values calculation in KVM
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
include
The field keeps monotonic time since boot.
The value of boot will be used in KVM for masterclock.
This is a part of the work aiming to move to a more simple scheme
of masterclock related values calculation in KVM
Signed-off-by: Denis Plotnikov
---
include/linux/timekeeping.h | 2 ++
kernel
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
include/linux/timekeeping.h | 3 +++
kernel/time/timekeeping.c | 13 +++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 5008e3e..528d088
Signed-off-by: Denis Plotnikov
---
include/linux/timekeeping.h | 3 +++
kernel/time/timekeeping.c | 13 +++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 5008e3e..528d088 100644
--- a/include/linux
clocksource.
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
arch/x86/kernel/pvclock.c | 19 ---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/pvclock.c b/arch/x86/kernel/pvclock.c
index bece384..5898f20 100644
--- a/arch/x86/
clocksource.
Signed-off-by: Denis Plotnikov
---
arch/x86/kernel/pvclock.c | 19 ---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/pvclock.c b/arch/x86/kernel/pvclock.c
index bece384..5898f20 100644
--- a/arch/x86/kernel/pvclock.c
+++ b/arch/x86/kernel
This allows L2 guests to use masterclock, namely
provide KVM with ability to use masterclock while
running over kvmclock closksource in the cases when
it's possible.
This is the final part of the work of teaching KVM
to use masterclock when over kvmclock clocksource.
Signed-off-by: Denis
This allows L2 guests to use masterclock, namely
provide KVM with ability to use masterclock while
running over kvmclock closksource in the cases when
it's possible.
This is the final part of the work of teaching KVM
to use masterclock when over kvmclock clocksource.
Signed-off-by: Denis
The callback provides extended information about just read
clocksource value.
It's going to be used in cases when detailed system information
needed for further time related values calculation, e.g in KVM
masterclock settings calculation.
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.
The callback provides extended information about just read
clocksource value.
It's going to be used in cases when detailed system information
needed for further time related values calculation, e.g in KVM
masterclock settings calculation.
Signed-off-by: Denis Plotnikov
---
include/linux
By doing that, add tsc clocksource to a list of KVM clocksources
providing valid cycle values, meaning that KVM can use its masterclock.
This is a part of the work aiming to move to a more simple scheme of
masterclock related values calculation in KVM.
Signed-off-by: Denis Plotnikov <dplo
By doing that, add tsc clocksource to a list of KVM clocksources
providing valid cycle values, meaning that KVM can use its masterclock.
This is a part of the work aiming to move to a more simple scheme of
masterclock related values calculation in KVM.
Signed-off-by: Denis Plotnikov
---
arch
On 19.12.2016 12:47, Paolo Bonzini wrote:
This is the result of cleaning up the places that set REQ_EVENT unnecessarily.
The savings on self-IPI kvm-unit-tests are:
self_ipi_sti_nop~300 clock cycles
self_ipi_sti_hlt~300 clock cycles
self_ipi_tpr
On 19.12.2016 12:47, Paolo Bonzini wrote:
This is the result of cleaning up the places that set REQ_EVENT unnecessarily.
The savings on self-IPI kvm-unit-tests are:
self_ipi_sti_nop~300 clock cycles
self_ipi_sti_hlt~300 clock cycles
self_ipi_tpr
to apic_update_ppr to make sure the supression of KVM_REQ_EVENT is done
in the KVM_REQ_EVENT processing path only.
This microoptimization gives 10% performance increase on a synthetic
test doing a lot of IPC in Windows using window messages.
Reviewed-by: Roman Kagan <rka...@virtuozzo.com>
Signed-off-by:
to apic_update_ppr to make sure the supression of KVM_REQ_EVENT is done
in the KVM_REQ_EVENT processing path only.
This microoptimization gives 10% performance increase on a synthetic
test doing a lot of IPC in Windows using window messages.
Reviewed-by: Roman Kagan
Signed-off-by: Denis Plotnikov
---
arch
a lot of IPC in Windows using window messages.
Reviewed-by: Roman Kagan <rka...@virtuozzo.com>
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
arch/x86/kvm/lapic.c | 20 ++--
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kvm/la
a lot of IPC in Windows using window messages.
Reviewed-by: Roman Kagan
Signed-off-by: Denis Plotnikov
---
arch/x86/kvm/lapic.c | 20 ++--
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 6f69340..b3025d8 100644
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