On 03/06/2013 05:41 AM, Marcelo Tosatti wrote:
On Tue, Mar 05, 2013 at 02:22:08PM -0600, Michael Wolf wrote:
Sorry for the delay in the response. I did not see the email
right away.
On Mon, 2013-02-18 at 22:11 -0300, Marcelo Tosatti wrote:
On Mon, Feb 18, 2013 at 05:43:47PM +0100, Frederic
On 02/06/2013 10:07 PM, Michael Wolf wrote:
On 02/06/2013 08:36 AM, Glauber Costa wrote:
On 02/06/2013 01:49 AM, Michael Wolf wrote:
Add a helper routine to scheduler/core.c to allow the kvm module
to retrieve the cpu hardlimit settings. The values will be used
to set up a timer that is used
On 02/06/2013 01:49 AM, Michael Wolf wrote:
Add a helper routine to scheduler/core.c to allow the kvm module
to retrieve the cpu hardlimit settings. The values will be used
to set up a timer that is used to separate the consigned from the
steal time.
Sorry: What is the business of a timer in
I am deeply sorry.
I was busy first time I read this, so I postponed answering and ended up
forgetting.
Sorry
include/linux/sched.h:
unsigned long long run_delay; /* time spent waiting on a runqueue */
So if you are out of the runqueue, you won't get steal time accounted,
and then I truly
On 11/30/2012 09:55 PM, Pavel Emelyanov wrote:
Hello,
This is an attempt to implement support for memory snapshot for the the
checkpoint-restore project (http://criu.org).
To create a dump of an application(s) we save all the information about it
to files. No surprise, the biggest part of
On 12/04/2012 12:16 AM, Marcelo Tosatti wrote:
On Mon, Dec 03, 2012 at 12:36:33PM +0400, Glauber Costa wrote:
On 11/30/2012 09:55 PM, Pavel Emelyanov wrote:
Hello,
This is an attempt to implement support for memory snapshot for the the
checkpoint-restore project (http://criu.org
On 11/27/2012 07:10 PM, Michael Wolf wrote:
On 11/27/2012 02:48 AM, Glauber Costa wrote:
Hi,
On 11/27/2012 12:36 AM, Michael Wolf wrote:
In the case of where you have a system that is running in a
capped or overcommitted environment the user may see steal time
being reported in accounting
On 11/28/2012 10:43 PM, Michael Wolf wrote:
On 11/27/2012 05:24 PM, Marcelo Tosatti wrote:
On Mon, Nov 26, 2012 at 02:36:24PM -0600, Michael Wolf wrote:
In the case of where you have a system that is running in a
capped or overcommitted environment the user may see steal time
being reported
Hi,
On 11/27/2012 12:36 AM, Michael Wolf wrote:
In the case of where you have a system that is running in a
capped or overcommitted environment the user may see steal time
being reported in accounting tools such as top or vmstat. This can
cause confusion for the end user. To ease the
the others untouched, it looks correct.
Acked-by: Glauber Costa glom...@parallels.com
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On 11/20/2012 01:57 AM, Marcelo Tosatti wrote:
This patchset, based on earlier work by Jeremy Fitzhardinge, implements
paravirtual clock vsyscall support.
It should be possible to implement Xen support relatively easily.
It reduces clock_gettime from 500 cycles to 200 cycles
on my
.
There is no such guarantee with per cpu areas, therefore move
to memblock_alloc based allocation.
Ok.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
For the concept:
Acked-by: Glauber Costa glom...@parallels.com
I do have one comment.
Index: vsyscall/arch/x86/kernel/kvmclock.c
On 11/15/2012 04:08 AM, Marcelo Tosatti wrote:
Originally from Jeremy Fitzhardinge.
So code can be reused.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
I thought I had acked this one already?
But maybe I didn't...
Acked-by: Glauber Costa glom...@parallels.com
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On 11/15/2012 04:08 AM, Marcelo Tosatti wrote:
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: vsyscall/arch/x86/kernel/pvclock.c
===
--- vsyscall.orig/arch/x86/kernel/pvclock.c
Acked-by: Glauber Costa glom
On 11/15/2012 04:08 AM, Marcelo Tosatti wrote:
As noted by Gleb, not advertising SSE2 support implies
no RDTSC barriers.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
And this gets a separate patch because?
Index: vsyscall/arch/x86/include/asm/pvclock.h
tricky...
Assuming you tested this change in at least one stable tsc and one
unstable tsc system:
Acked-by: Glauber Costa glom...@parallels.com
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.
There is no such guarantee with per cpu areas, therefore move
to memblock_alloc based allocation.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
No further objections.
Acked-by: Glauber Costa glom...@parallels.com
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On 11/02/2012 05:00 PM, Marcelo Tosatti wrote:
On Fri, Nov 02, 2012 at 02:23:06PM +0400, Glauber Costa wrote:
On 11/02/2012 01:39 AM, Marcelo Tosatti wrote:
On Thu, Nov 01, 2012 at 06:28:31PM +0400, Glauber Costa wrote:
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
Allow a guest to register
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
+ info = pvclock_get_vsyscall_time_info(cpu);
+
+ low = (int)__pa(info) | 1;
+ high = ((u64)__pa(per_cpu(hv_clock, cpu)) 32);
+ ret = native_write_msr_safe(MSR_KVM_USERSPACE_TIME, low, high);
+ printk(KERN_INFO kvm-clock:
On 10/31/2012 07:12 AM, Marcelo Tosatti wrote:
On Tue, Oct 30, 2012 at 11:39:32AM +0200, Avi Kivity wrote:
On 10/29/2012 08:40 PM, Marcelo Tosatti wrote:
On Mon, Oct 29, 2012 at 10:44:41AM -0700, Jeremy Fitzhardinge wrote:
On 10/29/2012 07:45 AM, Glauber Costa wrote:
On 10/24/2012 05:13 PM
On 11/02/2012 01:39 AM, Marcelo Tosatti wrote:
On Thu, Nov 01, 2012 at 06:28:31PM +0400, Glauber Costa wrote:
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
Allow a guest to register a second location for the VCPU time info
structure for each vcpu (as described by MSR_KVM_SYSTEM_TIME_NEW
On 11/02/2012 04:33 AM, Marcelo Tosatti wrote:
On Thu, Nov 01, 2012 at 07:42:43PM -0200, Marcelo Tosatti wrote:
On Thu, Nov 01, 2012 at 06:41:46PM +0400, Glauber Costa wrote:
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
+#ifdef CONFIG_PARAVIRT_CLOCK
+
+static notrace const struct
===
Reviewed-by: Glauber Costa glom...@parallels.com
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On 11/01/2012 03:48 PM, Gleb Natapov wrote:
On Wed, Oct 31, 2012 at 08:46:58PM -0200, Marcelo Tosatti wrote:
Originally from Jeremy Fitzhardinge.
pvclock_get_time_values, which contains the memory barriers
will be removed by next patch.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
On 11/01/2012 02:46 AM, Marcelo Tosatti wrote:
Originally from Jeremy Fitzhardinge.
We can copy the information directly from struct pvclock_vcpu_time_info,
remove pvclock_shadow_time.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Reviewed-by: Glauber Costa glom...@parallels.com
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
+static __always_inline
+unsigned __pvclock_read_cycles(const struct pvclock_vcpu_time_info *src,
+cycle_t *cycles, u8 *flags)
+{
+ unsigned version;
+ cycle_t ret, offset;
+ u8 ret_flags;
+
+
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: vsyscall/arch/x86/kernel/pvclock.c
If you are resending this series, I don't see a reason for this one to
be in a separate patch.
code itself is fine.
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On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
Originally from Jeremy Fitzhardinge.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Please collect peterz's ack for this one.
Index: vsyscall/include/linux/sched.h
===
---
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
Originally from Jeremy Fitzhardinge.
Introduce generic, non hypervisor specific, pvclock initialization
routines.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: vsyscall/arch/x86/kernel/pvclock.c
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
Allow a guest to register a second location for the VCPU time info
structure for each vcpu (as described by MSR_KVM_SYSTEM_TIME_NEW).
This is intended to allow the guest kernel to map this information
into a usermode accessible page, so that
On 11/01/2012 02:47 AM, Marcelo Tosatti wrote:
+#ifdef CONFIG_PARAVIRT_CLOCK
+
+static notrace const struct pvclock_vsyscall_time_info *get_pvti(int cpu)
+{
+ const aligned_pvti_t *pvti_base;
+ int idx = cpu / (PAGE_SIZE/PVTI_SIZE);
+ int offset = cpu % (PAGE_SIZE/PVTI_SIZE);
+
On 10/29/2012 09:44 PM, Jeremy Fitzhardinge wrote:
On 10/29/2012 07:45 AM, Glauber Costa wrote:
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Allow a guest to register a second location for the VCPU time info
structure for each vcpu (as described by MSR_KVM_SYSTEM_TIME_NEW
On 10/29/2012 10:40 PM, Marcelo Tosatti wrote:
On Mon, Oct 29, 2012 at 10:44:41AM -0700, Jeremy Fitzhardinge wrote:
On 10/29/2012 07:45 AM, Glauber Costa wrote:
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Allow a guest to register a second location for the VCPU time info
structure
On 10/29/2012 10:41 PM, Marcelo Tosatti wrote:
On Mon, Oct 29, 2012 at 06:47:57PM +0400, Glauber Costa wrote:
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Required by next patch.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
I don't see where.
+ if (unlikely(!(flags
On 10/29/2012 10:42 PM, Marcelo Tosatti wrote:
On Mon, Oct 29, 2012 at 06:59:35PM +0400, Glauber Costa wrote:
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Improve performance of time system calls when using Linux pvclock,
by reading time info from fixmap visible copy of pvclock data
On 10/29/2012 10:45 PM, Marcelo Tosatti wrote:
On Mon, Oct 29, 2012 at 07:04:59PM +0400, Glauber Costa wrote:
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Allow the caller to pass host tsc value to kvm_x86_ops-read_l1_tsc().
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Would you
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
KVM added a global variable to guarantee monotonicity in the guest.
One of the reasons for that is that the time between
1. ktime_get_ts(timespec);
2. rdtscll(tsc);
Is variable. That is, given a host with stable TSC, suppose that
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Index: vsyscall/arch/x86/Kconfig
===
--- vsyscall.orig/arch/x86/Kconfig
+++ vsyscall/arch/x86/Kconfig
@@ -632,6 +632,13 @@ config PARAVIRT_SPINLOCKS
config PARAVIRT_CLOCK
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
+ */
+int __init pvclock_init_vsyscall(void)
+{
+ int idx;
+ unsigned int size = PVCLOCK_VSYSCALL_NR_PAGES*PAGE_SIZE;
+
+ pvclock_vdso_info = __alloc_bootmem(size, PAGE_SIZE, 0);
+ if (!pvclock_vdso_info)
+ return
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Allow a guest to register a second location for the VCPU time info
structure for each vcpu (as described by MSR_KVM_SYSTEM_TIME_NEW).
This is intended to allow the guest kernel to map this information
into a usermode accessible page, so that
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Required by next patch.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
I don't see where.
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On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Improve performance of time system calls when using Linux pvclock,
by reading time info from fixmap visible copy of pvclock data.
Originally from Jeremy Fitzhardinge.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index:
On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
Allow the caller to pass host tsc value to kvm_x86_ops-read_l1_tsc().
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Would you mind explaining why?
it seems to me that rdtscll() here would be perfectly safe: the only
case in which they
On 10/17/2012 06:23 AM, Michael Wolf wrote:
In the case of where you have a system that is running in a
capped or overcommitted environment the user may see steal time
being reported in accounting tools such as top or vmstat. This can
cause confusion for the end user. To ease the confusion
On 08/27/2012 08:50 AM, Michael Wolf wrote:
On Sat, 2012-08-25 at 19:36 -0400, Glauber Costa wrote:
On 08/24/2012 11:11 AM, Michael Wolf wrote:
On Fri, 2012-08-24 at 08:53 +0400, Glauber Costa wrote:
On 08/24/2012 03:14 AM, Michael Wolf wrote:
This is an RFC regarding the reporting
On 08/27/2012 01:19 PM, Michael Wolf wrote:
On Mon, 2012-08-27 at 11:50 -0700, Glauber Costa wrote:
On 08/27/2012 08:50 AM, Michael Wolf wrote:
On Sat, 2012-08-25 at 19:36 -0400, Glauber Costa wrote:
On 08/24/2012 11:11 AM, Michael Wolf wrote:
On Fri, 2012-08-24 at 08:53 +0400, Glauber Costa
On 08/27/2012 02:27 PM, Michael Wolf wrote:
On Mon, 2012-08-27 at 13:31 -0700, Avi Kivity wrote:
On 08/27/2012 01:23 PM, Michael Wolf wrote:
How would a guest know what its entitlement is?
Currently the Admin/management tool setting up the guests will put it on
the qemu commandline. From
On 08/24/2012 11:11 AM, Michael Wolf wrote:
On Fri, 2012-08-24 at 08:53 +0400, Glauber Costa wrote:
On 08/24/2012 03:14 AM, Michael Wolf wrote:
This is an RFC regarding the reporting of stealtime. In the case of
where you have a system that is running with partial processors such as
KVM
On 08/24/2012 03:14 AM, Michael Wolf wrote:
This is an RFC regarding the reporting of stealtime. In the case of
where you have a system that is running with partial processors such as
KVM the user may see steal time being reported in accounting tools such
as top or vmstat. This can cause
On 07/11/2011 10:11 AM, Avi Kivity wrote:
On 07/11/2011 04:10 PM, Avi Kivity wrote:
I think Peter acked this, yes? Please include his acks.
Sorry, I meant this for the kernel/sched.c bits.
Yes he did, after I posted the patches.
I will include his acks in the respin, since they won't
On 07/11/2011 10:09 AM, Avi Kivity wrote:
On 07/04/2011 06:32 PM, Glauber Costa wrote:
Since in a later patch I intend to call jump labels inside
CONFIG_PARAVIRT, IA64 would fail to compile if they are not
provided. This patch provides those jump labels for the IA64
architecture.
Please get
On 07/11/2011 09:58 AM, Avi Kivity wrote:
On 07/07/2011 08:07 PM, Glauber Costa wrote:
+static void record_steal_time(struct kvm_vcpu *vcpu)
+{
+ u64 delta;
+
+ if (!(vcpu-arch.st.msr_val KVM_MSR_ENABLED))
+ return;
+
+ if (unlikely(kvm_read_guest_cached(vcpu-kvm,vcpu-arch.st.stime,
+ vcpu
This patch is simple, put in a different commit so it can be more easily
shared between guest and hypervisor. It just defines a named constant
to indicate the enable bit for KVM-specific MSRs.
Signed-off-by: Glauber Costa glom...@redhat.com
Acked-by: Rik van Riel r...@redhat.com
Tested-by: Eric B
scheduler give us the
advantage of direct acess to the runqueue data. In a later
opportunity, it can be used to tweak cpu power and make
the scheduler aware of the time it lost.
Signed-off-by: Glauber Costa glom...@redhat.com
Acked-by: Rik van Riel r...@redhat.com
Acked-by: Peter Zijlstra pet
part of the steal time infrasructure,
and can be backported independently of the guest portion.
Signed-off-by: Glauber Costa glom...@redhat.com
Tested-by: Eric B Munson emun...@mgebm.net
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet
This patch implements the kvm bits of the steal time infrastructure.
The most important part of it, is the steal time clock. It is an
continuous clock that shows the accumulated amount of steal time
since vcpu creation. It is supposed to survive cpu offlining/onlining.
Signed-off-by: Glauber
-by: Glauber Costa glom...@redhat.com
Acked-by: Rik van Riel r...@redhat.com
Tested-by: Eric B Munson emun...@mgebm.net
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity a...@redhat.com
CC: Anthony Liguori aligu...@us.ibm.com
---
arch/x86/include
in update_rq_clock().
Signed-off-by: Glauber Costa glom...@redhat.com
Acked-by: Rik van Riel r...@redhat.com
Acked-by: Peter Zijlstra pet...@infradead.org
Tested-by: Eric B Munson emun...@mgebm.net
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Avi Kivity a...@redhat.com
CC: Anthony Liguori aligu
Hi guys,
All ACKs being collected, I hope this can be merged.
Only patch 4/9 differs from the last submission. It merges
Marcelo's suggestions, so I didn't transposed the other ACKs to it
All the rest, is kept the same.
Enjoy
Glauber Costa (8):
KVM-HDR Add constant to represent KVM MSRs
From: Gleb Natapov g...@redhat.com
Introduce kvm_read_guest_cached() function in addition to write one we
already have.
[ by glauber: export function signature in kvm header ]
Signed-off-by: Gleb Natapov g...@redhat.com
Signed-off-by: Glauber Costa glom...@redhat.com
Acked-by: Rik van Riel r
, KVM_MSR_STEAL_TIME, that
holds the memory area address containing information about steal time
This patch contains the headers for it. I am keeping it separate to facilitate
backports to people who wants to backport the kernel part but not the
hypervisor, or the other way around.
Signed-off-by: Glauber
Since in a later patch I intend to call jump labels inside
CONFIG_PARAVIRT, IA64 would fail to compile if they are not
provided. This patch provides those jump labels for the IA64
architecture.
Signed-off-by: Glauber Costa glom...@redhat.com
Acked-by: Isaku Yamahata yamah...@valinux.co.jp
Acked
On 07/07/2011 07:51 AM, Marcelo Tosatti wrote:
On Mon, Jul 04, 2011 at 11:32:23AM -0400, Glauber Costa wrote:
To implement steal time, we need the hypervisor to pass the guest
information about how much time was spent running other processes
outside the VM, while the vcpu had meaningful work
to __always_inline.
Glauber Costa (8):
KVM-HDR Add constant to represent KVM MSRs enabled bit
KVM-HDR: KVM Steal time implementation
KVM-HV: KVM Steal time implementation
KVM-GST: Add a pv_ops stub for steal time
add jump labels for ia64 paravirt
KVM-GST: KVM Steal time accounting
KVM-GST: adjust
From: Gleb Natapov g...@redhat.com
Introduce kvm_read_guest_cached() function in addition to write one we
already have.
[ by glauber: export function signature in kvm header ]
Signed-off-by: Gleb Natapov g...@redhat.com
Signed-off-by: Glauber Costa glom...@redhat.com
---
include/linux
, KVM_MSR_STEAL_TIME, that
holds the memory area address containing information about steal time
This patch contains the headers for it. I am keeping it separate to facilitate
backports to people who wants to backport the kernel part but not the
hypervisor, or the other way around.
Signed-off-by: Glauber
part of the steal time infrasructure,
and can be backported independently of the guest portion.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity
This patch is simple, put in a different commit so it can be more easily
shared between guest and hypervisor. It just defines a named constant
to indicate the enable bit for KVM-specific MSRs.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge
in update_rq_clock().
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity a...@redhat.com
CC: Anthony Liguori aligu...@us.ibm.com
CC: Eric B Munson emun...@mgebm.net
-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity a...@redhat.com
CC: Anthony Liguori aligu...@us.ibm.com
CC: Eric B Munson emun...@mgebm.net
---
arch/x86/include/asm/paravirt.h
scheduler give us the
advantage of direct acess to the runqueue data. In a later
opportunity, it can be used to tweak cpu power and make
the scheduler aware of the time it lost.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi
Since in a later patch I intend to call jump labels inside
CONFIG_PARAVIRT, IA64 would fail to compile if they are not
provided. This patch provides those jump labels for the IA64
architecture.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Isaku Yamahata yamah...@valinux.co.jp
CC: Eddie
This patch implements the kvm bits of the steal time infrastructure.
The most important part of it, is the steal time clock. It is an
continuous clock that shows the accumulated amount of steal time
since vcpu creation. It is supposed to survive cpu offlining/onlining.
Signed-off-by: Glauber
delayacct on the hypervisor side allow us to simplify the guest
code dramatically, since now we don't need to test for is_idle: if we're idle,
we won't have steal time and end of story.
Hope you enjoy.
Glauber Costa (8):
KVM-HDR Add constant to represent KVM MSRs enabled bit
KVM-HDR: KVM Steal
part of the steal time infrasructure,
and can be backported independently of the guest portion.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity
This patch is simple, put in a different commit so it can be more easily
shared between guest and hypervisor. It just defines a named constant
to indicate the enable bit for KVM-specific MSRs.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge
in update_rq_clock().
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity a...@redhat.com
CC: Anthony Liguori aligu...@us.ibm.com
CC: Eric B Munson emun...@mgebm.net
From: Gleb Natapov g...@redhat.com
Introduce kvm_read_guest_cached() function in addition to write one we
already have.
[ by glauber: export function signature in kvm header ]
Signed-off-by: Gleb Natapov g...@redhat.com
Signed-off-by: Glauber Costa glom...@redhat.com
---
include/linux
-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity a...@redhat.com
CC: Anthony Liguori aligu...@us.ibm.com
CC: Eric B Munson emun...@mgebm.net
---
arch/x86/include/asm/paravirt.h
Since in a later patch I intend to call jump labels inside
CONFIG_PARAVIRT, IA64 would fail to compile if they are not
provided. This patch provides those jump labels for the IA64
architecture.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Isaku Yamahata yamah...@valinux.co.jp
CC: Eddie
scheduler give us the
advantage of direct access to the runqueue data. In a later
opportunity, it can be used to tweak cpu power and make
the scheduler aware of the time it lost.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi
This patch implements the kvm bits of the steal time infrastructure.
The most important part of it, is the steal time clock. It is an
continuous clock that shows the accumulated amount of steal time
since vcpu creation. It is supposed to survive cpu offlining/onlining.
Signed-off-by: Glauber
, KVM_MSR_STEAL_TIME, that
holds the memory area address containing information about steal time
This patch contains the headers for it. I am keeping it separate to facilitate
backports to people who wants to backport the kernel part but not the
hypervisor, or the other way around.
Signed-off-by: Glauber
On 06/30/2011 09:59 AM, Eric B Munson wrote:
On Thu, 30 Jun 2011, Avi Kivity wrote:
On 06/30/2011 12:56 AM, Eric B Munson wrote:
My mail provider seems to have dropped patch 1 of the series so I can't reply
directly to it, please add my Tested-by there as well.
How did you test it then?
On 06/30/2011 06:54 PM, Peter Zijlstra wrote:
On Wed, 2011-06-29 at 11:29 -0400, Glauber Costa wrote:
+static noinline bool touch_steal_time(int is_idle)
That noinline is very unlucky there,
+{
+ u64 steal, st = 0;
+
+ if (static_branch(paravirt_steal_enabled
On 06/30/2011 06:54 PM, Peter Zijlstra wrote:
On Wed, 2011-06-29 at 11:29 -0400, Glauber Costa wrote:
This patch accounts steal time time in kernel/sched.
I kept it from last proposal, because I still see advantages
in it: Doing it here will give us easier access from scheduler
variables
On 06/30/2011 06:54 PM, Peter Zijlstra wrote:
On Wed, 2011-06-29 at 11:29 -0400, Glauber Costa wrote:
+ if (static_branch(paravirt_steal_enabled)) {
How is that going to compile on !CONFIG_PARAVIRT or !x86 in general?
Only x86-PARAVIRT will provide that variable.
Good point. I'd
This patch adds a function pointer in one of the many paravirt_ops
structs, to allow guests to register a steal time function.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet
This patch is simple, put in a different commit so it can be more easily
shared between guest and hypervisor. It just defines a named constant
to indicate the enable bit for KVM-specific MSRs.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge
, as suggested by Gleb.
On the guest side, the two prev_steal_time variables are colapsed
into a single one. Steal time accounting is also done inside
update_rq_clock().
Glauber Costa (8):
KVM-HDR Add constant to represent KVM MSRs enabled bit
KVM-HDR: KVM Steal time implementation
KVM-HV: KVM Steal
the overall throughput.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity a...@redhat.com
CC: Anthony Liguori aligu...@us.ibm.com
CC: Eric B Munson emun...@mgebm.net
, KVM_MSR_STEAL_TIME, that
holds the memory area address containing information about steal time
This patch contains the headers for it. I am keeping it separate to facilitate
backports to people who wants to backport the kernel part but not the
hypervisor, or the other way around.
Signed-off-by: Glauber
.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet...@infradead.org
CC: Avi Kivity a...@redhat.com
CC: Anthony Liguori aligu...@us.ibm.com
CC: Eric B Munson emun...@mgebm.net
---
arch/x86
Register steal time within KVM. Everytime we sample the steal time
information, we update a local variable that tells what was the
last time read. We then account the difference.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge
From: Gleb Natapov g...@redhat.com
Introduce kvm_read_guest_cached() function in addition to write one we
already have.
[ by glauber: export function signature in kvm header ]
Signed-off-by: Gleb Natapov g...@redhat.com
Signed-off-by: Glauber Costa glom...@redhat.com
---
include/linux
won't
want to record statistics about all processes running, the previous method
of time measurement on put/load vcpu is kept for !SCHEDSTATS.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra
() can be called from
multiple places, not only account_process_tick(), steal time
grabbing is repeated in each account function separatedely.
Signed-off-by: Glauber Costa glom...@redhat.com
CC: Rik van Riel r...@redhat.com
CC: Jeremy Fitzhardinge jeremy.fitzhardi...@citrix.com
CC: Peter Zijlstra pet
On 06/20/2011 05:56 PM, Marcelo Tosatti wrote:
On Sun, Jun 19, 2011 at 12:57:53PM +0300, Avi Kivity wrote:
On 06/17/2011 01:20 AM, Glauber Costa wrote:
To implement steal time, we need the hypervisor to pass the guest information
about how much time was spent running other processes outside
On 06/20/2011 05:02 AM, Avi Kivity wrote:
On 06/20/2011 10:21 AM, Gleb Natapov wrote:
On Sun, Jun 19, 2011 at 04:02:22PM +0300, Avi Kivity wrote:
On 06/19/2011 03:59 PM, Gleb Natapov wrote:
On Sun, Jun 19, 2011 at 03:35:58PM +0300, Avi Kivity wrote:
On 06/15/2011 12:09 PM, Gleb Natapov
On 06/19/2011 07:04 AM, Avi Kivity wrote:
On 06/17/2011 01:20 AM, Glauber Costa wrote:
This patch accounts steal time time in kernel/sched.
I kept it from last proposal, because I still see advantages
in it: Doing it here will give us easier access from scheduler
variables such as the cpu rq
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