umask_t tickled; /* cpus been tickled */
>> -struct timer *repl_timer; /* replenishment timer */
>> +spinlock_t lock; /* the global coarse grand lock */
>
> * course-grained
>
> Also, I'm not sure what the point of indenting all thes
On Fri, Jun 24, 2016 at 3:45 AM, Dario Faggioli
wrote:
> On Thu, 2016-06-23 at 11:42 +0100, George Dunlap wrote:
>> On 22/06/16 17:16, Meng Xu wrote:
>> >
>> > I think he is trying to align those comments to make them start
>> > from
>> > the same col
On Mon, Jun 20, 2016 at 11:43 AM, Meng Xu wrote:
>
> Hi all,
>
> I'm running Xen on NVIDIA Jetson TK1 board. The Xen code is from Ian's
> repo.: git://xenbits.xen.org/people/ianc/xen.git with the commit point
> c78d51660446d33dac4bb07c3c17e1d14d62ebc2
>
> Right
On Fri, Jul 15, 2016 at 8:01 AM, Dario Faggioli
wrote:
> [Reducing the rate of cross-posting a bit]
>
> On Wed, 2016-06-08 at 11:43 -0400, Meng Xu wrote:
> > On Wed, Jun 8, 2016 at 9:02 AM, Lars Kurth
> > wrote:
> > > In addition to presentations, we will be runn
pure code motion; no functional change.
>
> Signed-off-by: George Dunlap
>
As to sched_rt.c,
Reviewed-by: Meng Xu
Thanks,
Meng
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
___
next > svc->cur_deadline )
> > +t_next = svc->cur_deadline;
> > +
> Why do you need to do this? The next time at which the timer needs to
> be reprogrammed is, after you'll have done all the replenishments that
> needed to be done, here in this loop
edule() be
> > sorting it?
> >
> Ops, yes, you are right, this is not budget enforcement. So, budget
> enforcement looks still to be missing from this patch (and that is why
> I asked whether it is actually working).
>
> And this chunk of code (and perhaps this whole function)
gt; added repl queue to keep track of repl events.
> timer is now per scheduler.
> timer is init on a valid cpu in a cpupool.
>
> Signed-off-by: Tianyang Chen
> Signed-off-by: Meng Xu
> Signed-off-by: Dagaen Golomb
> ---
> xen/common/sched_rt.c | 337
+++
off-by: Dario Faggioli
> ---
> Cc: George Dunlap
> Cc: Meng Xu
> Cc: Tianyang Chen
> Cc: Olaf Hering
> ---
> xen/common/sched_credit.c |2 +-
> xen/common/sched_credit2.c |6 +++---
> xen/common/sched_rt.c |2 +-
> 3 files changed, 5 insert
On Wed, Feb 17, 2016 at 4:52 AM, Dario Faggioli
wrote:
> On Tue, 2016-02-16 at 13:21 -0500, Meng Xu wrote:
>> Hi Dario,
>>
>> Since this patch did some obvious change, I will reply with
>> reviewed-by, although my reviewed-by does not count much. ;-)
>>
> T
been
> picked from the runqueue, by looking at when cpu_idle
> is invoked --which is the same thing one would do if on
> Credit or Credit2.
>
> Signed-off-by: Dario Faggioli
> Reviewed-by: Konrad Rzeszutek Wilk
Reviewed-by: Meng Xu
> ---
> Cc: George Dunlap
> Cc:
re information just cause more confusion.
What do you guys think which type of information we should include?
Thanks,
Meng
>
>
> Lars
>
> > On 1 Dec 2015, at 08:59, Dario Faggioli wrote:
> >
> > On Sun, 2015-11-29 at 11:44 -0500, Meng Xu wrote:
&g
Hi Dario,
2015-12-02 5:19 GMT-06:00 Dario Faggioli :
> On Wed, 2015-12-02 at 11:03 +, Lars Kurth wrote:
>> > On 2 Dec 2015, at 05:54, Meng Xu wrote:
>> >
>> > Maybe we could add some health warning and add a link to this
>> > discussion?
>> > M
On Thu, Dec 31, 2015 at 6:20 PM, Tianyang Chen wrote:
>
> Budget replenishment is now handled by a dedicated timer which is
> triggered at the most imminent release time of all runnable vcpus.
>
> Changes since V1:
> None
>
> Signed-off-by: Tianyang Chen
> Signe
y: Tianyang Chen
>> Signed-off-by: Meng Xu
>> Signed-off-by: Dagaen Golomb
>> ---
>> -cover-letter.patch| 16 +++
>> 0001-Improved-RTDS-scheduler.patch | 280
>>
>> bak
following to the Xen 4.7 development update?
* Convert RTDS from time to event driven model
- Tianyang Chen
- Meng Xu
Tianyang is cc.ed and his email is ti...@seas.upenn.edu
My email is men...@cis.upenn.edu
Thank you very much! :-)
Best regards,
Meng
---
Meng
On Tue, Jan 5, 2016 at 10:34 PM, Wei Liu wrote:
> On Tue, Jan 05, 2016 at 10:30:53PM +0800, Meng Xu wrote:
>> Hi Wei,
>>
>> On Mon, Jan 4, 2016 at 6:15 PM, Wei Liu wrote:
>> > This email only tracks big items for xen.git tree. Please reply for items
>> &g
On Wed, Jan 6, 2016 at 2:57 AM, Tianyang Chen wrote:
>
>
>
> On 12/31/2015 8:44 AM, Meng Xu wrote:
>>
>> On Thu, Dec 31, 2015 at 6:20 PM, Tianyang Chen wrote:
>>>
>>>
>>> Budget replenishment is now handled by a dedicated timer which is
>
Yes, you are right. The current RTDS should not return 0 when the idle
VCPU is picked. I think it should do as what the credit does, i.e.,
returning a negative value to avoid arming the timer.
Right now, we are working on changing RTDS to event-driven model. We
will fix this in the next version of t
Hi Dario,
On Mon, Jan 18, 2016 at 11:32 AM, Dario Faggioli
wrote:
> On Mon, 2016-01-18 at 11:07 -0500, Meng Xu wrote:
>> On Mon, Jan 18, 2016 at 6:00 AM, Dario Faggioli
>> wrote:
>> >
>> > RTDS behavior is broken in many respect, including this,
>> >
&g
On Tue, Jan 19, 2016 at 11:35 AM, Tianyang Chen wrote:
>
>
>
> On 1/15/2016 10:33 AM, Meng Xu wrote:
>>
>> On Wed, Jan 6, 2016 at 2:57 AM, Tianyang Chen wrote:
>>>
>>>
>>>
>>>
>>> On 12/31/2015 8:44 AM, Meng Xu wrote:
>&
o back to v2, and comment on it.
Sure! Please comment on it. Another option is to keep the running
VCPUs onto the top of the runq.
>
> If, during the review, it turns out that we need something like this,
> I'll come here again.
>
Sure! Looking forward to your comment.
> In
re re-arming the
>> replenishment timer)
>>
>> Meng's example falls in a., AFAICT, and we can just deal with that when
>> we handle the 'budget exhausted' event (in rt_schedule(), in this case,
>> I think).
>>
>> The case you refer to in
Hi Dario and Tianyang,
On Tue, Jan 26, 2016 at 9:06 AM, Dario Faggioli
wrote:
> On Mon, 2016-01-25 at 18:00 -0500, Meng Xu wrote:
>> On Mon, Jan 25, 2016 at 5:04 PM, Tianyang Chen
>> wrote:
>> > I have removed some of the Ccs so they won't get bothered as we
&
;m working on the code
and then evaluating its performance. Once I can confirm this will
definitely benefit the RTDS scheduler, I will send a separate email to
the ML to explain the goal/design/implementation in detail.
Thanks,
Meng
--
---
Meng Xu
PhD Student in Computer and Information S
xplode, e.g., when removing
> pCPUs from an RTDS cpupool and assigning them to another
> one.
>
> Signed-off-by: Dario Faggioli
> Cc: George Dunlap
> Cc: Meng Xu
> Cc: Jan Beulich
> Cc: Keir Fraser
> ---
> xen/common/sched_rt.c | 18 ++
> 1
Hi Dario,
2015-03-16 13:10 GMT-04:00 Dario Faggioli :
> On Mon, 2015-03-16 at 18:04 +0100, Dario Faggioli wrote:
>> which is called by cpu_schedule_down(), and is necessary
>> for resetting the spinlock pointers in schedule_data from
>> the RTDS global runqueue lock, back to the default _lock
>> f
a few style issues (indentation, trailing
> whitespace, parentheses and blank line after var declarations)
>
> Signed-off-by: Dario Faggioli
> Cc: George Dunlap
> Cc: Meng Xu
> Cc: Jan Beulich
> Cc: Keir Fraser
> ---
> xen/common/sched_credit.c | 42 +++
so, put the
> info about affinity on the same, properly indented.
>
> Signed-off-by: Dario Faggioli
> Cc: George Dunlap
> Cc: Meng Xu
> Cc: Jan Beulich
> Cc: Keir Fraser
Reviewed-by: Meng Xu
Thanks,
Meng
---
Meng Xu
PhD Student in Computer and Information Sc
tch,
> instead of open coded string buffers.
>
> Signed-off-by: Dario Faggioli
> Cc: George Dunlap
> Cc: Meng Xu
> Cc: Jan Beulich
> Cc: Keir Fraser
> ---
> xen/common/sched_rt.c | 40
> 1 file changed, 32 insertions(+), 8
2015-03-16 13:04 GMT-04:00 Dario Faggioli :
> being serviced by the RTDS scheduler, as that is a
> legit situation to be in: think, for instance, of a
> newly created RTDS cpupool, with no domains migrated
> to it yet.
>
> Signed-off-by: Dario Faggioli
> Cc: George Dunlap
ee. I didn't realize the fact of the limited size of hypervisor
stack. That makes sense.
Thank you very much for clarification! :-)
Best,
Meng
---
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PhD Student in Computer and Information Science
University of Pennsylvania
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Hi Dario,
2015-03-17 10:12 GMT-04:00 Dario Faggioli :
> On Mon, 2015-03-16 at 16:30 -0400, Meng Xu wrote:
>> Hi Dario,
>>
> Hey,
>
>> 2015-03-16 13:05 GMT-04:00 Dario Faggioli :
>
>> >
>> > This change also takes the chance to add a scratch
f CPUs.)
>
> Such scratch area can be used to kill most of the
> cpumasks{_var}_t local variables in other functions
> in the file, but that is *NOT* done in this chage.
>
> Finally, convert the file to use keyhandler scratch,
> instead of open coded string buffers.
>
> Signed-
6cad92e833165fe45305
.
(I'm not sure if it's a good idea to attach the patch at the end of this
email. It may just make this email too long and hard to read. Please let me
know if you need it and I will send it in a separate email.)
Thank you very much for
2015-03-24 7:54 GMT-04:00 George Dunlap :
> On Tue, Mar 24, 2015 at 3:50 AM, Meng Xu wrote:
> > Hi Dario and George,
> >
> > I'm exploring the design choice of eliminating the Xen scheduler
> overhead on
> > the dedicated CPU. A dedicated CPU is a PCPU that ha
2015-03-24 17:08 GMT-04:00 George Dunlap :
> On Tue, Mar 24, 2015 at 3:27 PM, Meng Xu wrote:
> >> The simplest way to get your prototype working, in that case, would be
> >> to return the idle vcpu for that pcpu if the guest is blocked.
> >
> >
> > Exact
2015-03-25 7:58 GMT-04:00 George Dunlap :
> On 03/25/2015 01:48 AM, Meng Xu wrote:
> > Exactly! I will do some measurement on the overhead in #2 before I
> really
> > try to do it. Since #1 is fairly easy, I will first implement #1 and see
> > how much gap it remains t
continuous time below Xen in nested
virtualization may affect the scheduling decision and then make some domU
starving.
But it's weird that a domU is never scheduled...
(When I run Xen on virtual box, domU is slow but still running)
So I'm unsure if it's the scheduler issue or not...
> misunderstanding.
Dagaen Golomb and I (Meng Xu) will improve the RTDS scheduler for Xen 4.6:
RTDS Scheduler Improvement
Burn budget in finer granularity instead of 1ms;
Use separate timer per VCPU for each VCPU's budget replenishment,
instead of scanning the full runqueue
Choice 1 or Choice 2? or do you have better suggestion?
Thank you very much!
best,
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
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duler file
> (sched_rt.c) and will not require changes to any other Xen subsystems.
>
> Discussion, comments, and suggestions are welcome.
>
> Regards,
> Dagaen Golomb
Best,
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
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[Adding Denys and Andri from globallogic for their advice about the
user interface and why we need such functionality]
2015-02-21 10:51 GMT-05:00 Meng Xu :
> Hi all,
>
> This is for Xen 4.6: Enabling XL to set the parameters of each
> individual VCPU of a domain for RTDS schedule
libxl will also use the
array-based implementation.)
As to the data structure, we will use the union structure to hold the
data of the RTDS per-vcpu parameters, so that when other schedulers
want to support per-vcpu operation, they can add the specific data
structure in the union structure.
Does th
Hi Dario,
In summary, I agree with you and will apply these comments discussed
in this thread to work out a RFC patch for it. Below is just some
reply to your question. :-)
2015-02-25 3:44 GMT-05:00 Dario Faggioli :
> On Tue, 2015-02-24 at 21:42 -0500, Meng Xu wrote:
>> Hi all,
&
a couple of counters
> in credit2 and SEDF").
>
> Signed-off-by: Dario Faggioli
> Cc: Meng Xu
> Cc: George Dunlap
> Cc: Jan Beulich
> Cc: Keir Fraser
> ---
> xen/common/sched_rt.c |4
> 1 file changed, 4 insertions(+)
>
> diff --git a/xen/commo
2015-02-26 8:37 GMT-05:00 Dario Faggioli :
> and update them from Credit2 and RTDS schedulers.
>
> Signed-off-by: Dario Faggioli
> Cc: Meng Xu
> Cc: George Dunlap
> Cc: Jan Beulich
> Cc: Keir Fraser
> ---
> xen/common/sched_credit2.c |2 ++
> xen/c
2015-02-27 5:53 GMT-05:00 Dario Faggioli :
> On Fri, 2015-02-27 at 00:47 -0500, Meng Xu wrote:
>
>> 2015-02-26 8:37 GMT-05:00 Dario Faggioli :
>> and update them from Credit2 and RTDS schedulers.
>>
>> Signed-off-by: Dario Faggioli
>>
;)
> -PERFCOUNTER(vcpu_sleep, "csched: vcpu_sleep")
> -PERFCOUNTER(vcpu_wake_running, "csched: vcpu_wake_running")
> -PERFCOUNTER(vcpu_wake_onrunq, "csched: vcpu_wake_onrunq")
> -PERFCOUNTER(vcpu_wake_runnable, "csched: vcpu_wake_runnable")
> -PERFCOUNTER(vcpu_wake_not_runnable, "csched: vcpu_wake_not_runnable")
> PERFCOUNTER(vcpu_park, "csched: vcpu_park")
> PERFCOUNTER(vcpu_unpark,"csched: vcpu_unpark")
> PERFCOUNTER(tickle_idlers_none, "csched: tickle_idlers_none")
>
Reviewed-by: Meng Xu
Thanks,
Meng
---
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PhD Student in Computer and Information Science
University of Pennsylvania
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2015-03-06 12:20 GMT-05:00 Dario Faggioli :
> so update the relevant manpage and the example file.
>
> Signed-off-by: Dario Faggioli
> Cc: Ian Campbell
> Cc: Ian Jackson
> Cc: Stefano Stabellini
> Cc: Wei Liu
> Cc: Juergen Gross
> Cc: Meng Xu
> ---
> do
2015-09-23 4:42 GMT-04:00 Gohar Irfan :
>
> It is for a project, I'm trying to experiment with a couple of things.
Well, this is too general... Everything can be a project. People tries
to know what exact things you want to achieve so that they can figure
out if you are heading the correct directi
e used to boot the domU, the error
disappears.
So it is likely that the linux-image provided by the ubuntu archive that he
uses is kind of broken.
It is glad to know that it is not Xen's problem. :-)
Best regards,
Meng
---
Meng Xu
PhD Student in Com
en to" the meeting if there is still space left?
Thanks,
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
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above three steps?
I really appreciate any help or suggestion or comment.
Thank you very much!
Best,
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
___
Xen-devel mailin
Hi Andrew,
Thank you so much for your suggestion! I tried but have some questions.
2015-08-24 4:10 GMT-04:00 Andrew Cooper :
>
> On 24/08/2015 04:01, Meng Xu wrote:
>
> Hi,
>
> I'm trying to use a PV guest VM on Xen to help debug Linux.
> I was using VirtualBox to
2015-08-25 3:42 GMT-04:00 Andrew Cooper :
> On 25/08/2015 03:48, Meng Xu wrote:
>> Hi Andrew,
>>
>> Thank you so much for your suggestion! I tried but have some questions.
>>
>> 2015-08-24 4:10 GMT-04:00 Andrew Cooper :
>>> On 24/08/2015 04:01, Meng Xu wr
Hi Chao,
I'm Meng Xu from the University of Pennsylvania.
We purchased a computer that has Intel(R) Xeon(R) CPU E5-2618L v3 @ 2.30GHz
inside.
According to
http://www.intel.com/content/www/us/en/communications/cache-monitoring-cache-allocation-technologies.html,
Intel E5-2618L v3 should su
Hi Andrew and Chao,
2015-08-31 14:25 GMT-04:00 Andrew Cooper :
>
> On 31/08/15 18:42, Meng Xu wrote:
>
> Hi Chao,
>
> I'm Meng Xu from the University of Pennsylvania.
>
> We purchased a computer that has Intel(R) Xeon(R) CPU E5-2618L v3 @ 2.30GHz
> inside.
> A
2015-09-01 1:47 GMT-04:00 Chao Peng :
> On Mon, Aug 31, 2015 at 04:09:31PM -0400, Meng Xu wrote:
>> I looked into the xen/arch/x86/psr.c and found that the function
>> cat_cpu_init() just returned without initializing the variable
>> "cat_socket_enable".
>>
2015-09-01 9:04 GMT-04:00 Andrew Cooper :
> On 01/09/15 13:55, Meng Xu wrote:
>> 2015-09-01 1:47 GMT-04:00 Chao Peng :
>>> On Mon, Aug 31, 2015 at 04:09:31PM -0400, Meng Xu wrote:
>>>> I looked into the xen/arch/x86/psr.c and found that the function
>>>
2015-09-01 10:30 GMT-04:00 Andrew Cooper :
> On 01/09/15 15:20, Meng Xu wrote:
>> 2015-09-01 9:04 GMT-04:00 Andrew Cooper :
>>> On 01/09/15 13:55, Meng Xu wrote:
>>>> 2015-09-01 1:47 GMT-04:00 Chao Peng :
>>>>> On Mon, Aug 31, 2015 at 04:09:31PM -0400
2015-09-01 6:52 GMT-04:00 Ian Campbell :
> On Tue, 2015-08-25 at 09:04 -0400, Meng Xu wrote:
>> 2015-08-25 3:42 GMT-04:00 Andrew Cooper :
>> > On 25/08/2015 03:48, Meng Xu wrote:
>> > > Hi Andrew,
>> > >
>> > > Thank you so much for y
2015-09-01 11:26 GMT-04:00 Ian Campbell :
> On Tue, 2015-09-01 at 11:15 -0400, Meng Xu wrote:
>> 2015-09-01 6:52 GMT-04:00 Ian Campbell :
>> > On Tue, 2015-08-25 at 09:04 -0400, Meng Xu wrote:
>> > > 2015-08-25 3:42 GMT-04:00 Andrew Cooper :
>> >
Hi Andrew and Chao,
[Important things go first] It turns out my machine (Intel E5-2618L
v3) does have CAT capability!
Xen gives the false alarm that my machine does not have it. This
should be a bug, IMO. :-)
2015-09-01 10:42 GMT-04:00 Meng Xu :
> 2015-09-01 10:30 GMT-04:00 Andrew Cooper :
&g
2015-09-01 21:47 GMT-04:00 Chao Peng :
> On Tue, Sep 01, 2015 at 10:42:57AM -0400, Meng Xu wrote:
>> 2015-09-01 10:30 GMT-04:00 Andrew Cooper :
>> > On 01/09/15 15:20, Meng Xu wrote:
>> >> 2015-09-01 9:04 GMT-04:00 Andrew Cooper :
>> >>> On 01/09/15
2015-09-01 22:31 GMT-04:00 Chao Peng :
> On Tue, Sep 01, 2015 at 09:51:57PM -0400, Meng Xu wrote:
>> Hi Andrew and Chao,
>>
>> [Important things go first] It turns out my machine (Intel E5-2618L
>> v3) does have CAT capability!
>> Xen gives the false alarm that
e Student in Computer Science
> Illinois Institute of Technology
> Stuart Building Chicago, IL 60616
> +1 312 404 0122
>
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exen/getting-started.
I can add a wiki page very quickly today based on the pages on
https://sites.google.com/site/realtimexen/ .
Is that ok?
Thanks,
Meng
--
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
_
Hi Lars and Dario,
2014-12-19 11:15 GMT-05:00 Dario Faggioli :
> On Fri, 2014-12-19 at 10:55 -0500, Meng Xu wrote:
>
> > 2014-12-19 9:52 GMT-05:00 Lars Kurth :
> > Hi all,
> >
> > Please reply to the thread and I will add that page.
> >
>> cd-insert Insert a cdrom into a guest's cd drive
>>> cd-ejectEject a cdrom from a guest's cd drive
>>> mem-max Set the maximum amount reservation for a domain
>>> mem-set
y_info
xen_vnuma_topology_info_t;
DEFINE_XEN_GUEST_HANDLE(xen_vnuma_topology_info_t);
/* Next available subop number is 27 */
-#define RTXEN_PAGE_BITS 12
-#define RTXEN_PAGE_SIZE 4096
-#define RTXEN_LLC_SLICE_SIZE (2*1024*1024)
-#define RTXEN_LLC_ASSOC (1
Hi Andrew,
Thank you very much for your quick reply!
2015-01-14 7:20 GMT-05:00 Andrew Cooper :
> On 14/01/15 00:41, Meng Xu wrote:
>> Hi,
>>
>> [Goal]
>> I want to investigate the impact of the shared cache on the
>> performance of workload in guest domain.
>&
rc = xc_domain_populate_physmap_exact_ca(
dom->xch, dom->guest_domid, allocsz,
0, 0, &dom->p2m_host[i], cache_colors);
}
}
Thank you very much!
Best,
Meng
--
---
Meng Xu
PhD Student in Computer and I
peak of
> 1G) pages anyway.
Right now, I'm only looking at the PV guests and try to have some
measurements of the cache partitioning mechanisms on the PV guests. I
want to first show the benefits and cost of the page coloring
mechanisms in Xen and then may explore the other types of gu
wikipedia.org/wiki/Cache_coloring), some OS, e.g.,
FreeBSD, supports it. So I'm curious about the performance of the page
coloring mechanism on Xen and the strength and weakness of it.
(Although in theory, we know the strength and weakness, I want/hope to
see it in practical implementation.
e, take care of the case when
> XEN_DOMCTL_SCHEDOP_getinfo is called but no vCPUs have
> been allocated yet (by returning the default scheduling
> parameters).
>
> Signed-off-by: Dario Faggioli
> ---
> Cc: Meng Xu
> Cc: George Dunlap
> Cc: Andrew Cooper
> ---
> Chan
processors/i.mx6qp/sabre-board-for-smart-devices-reference-design-based-on-the-i.mx-6-series:RDIMX6SABREBRD
[2]
http://www.cnx-software.com/2013/12/19/mentor-embedded-arm-hypervisor-automotive-demo-on-freescale-i-mx6-board/
-------
Meng Xu
PhD Student in Computer and Information Science
Uni
's no need to do *_irqsave()).
>
> Signed-off-by: Dario Faggioli
> ---
> Cc: George Dunlap
> Cc: Meng Xu
> Cc: Andrew Cooper
> Cc: Jan Beulich
> ---
> Cahnges from v2:
> * locking in schedule_cpu_switch() is left in place (but
>turned to just _irq(), instea
gt; branch rel/sched/fix-vcpu-ins-rem-v2 in your repo., it is the
>> following code:
>>
>> lock = vcpu_schedule_lock_irq(vc, &flags);
>>
>> I guess maybe you forgot to change it in this commit but change it
>> the
>> following commit?
>>
> No, th
Hi Dario,
2015-11-04 9:12 GMT-05:00 Dario Faggioli :
> On Mon, 2015-11-02 at 09:45 -0500, Meng Xu wrote:
> > > > I guess maybe you forgot to change it in this commit but change
> > > > it
> > > > the
> > > > following commit?
> > > >
e to improve the
efficiency of the scheduler "a lot"
,
I will evaluate the performance of the RTDS scheduler with cyclictest once
Dagaen have the improved version done.
Thanks,
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http:/
If we cannot
eliminate one of virtualization, we should at least be able to upper
bound the effect of it.
Do you have some suggestions?
Thank you very much for your help and advice!
Best,
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
___
2015-04-08 5:13 GMT-04:00 George Dunlap :
> On 04/07/2015 09:25 PM, Meng Xu wrote:
>> Hi George, Dario and Konrad,
>>
>> I finished a prototype of the RTDS scheduler with the dedicated CPU
>> feature and did some quick evaluation on this feature. Right now, I
>> n
perf, which also use the PMC.)
Another thought on the CMT is that it seems that Intel introduces CMT
along with CAT. So I assume they want to use CMT along with CAT so
that it gives some hint on how to allocate LLC to different guests?
For example, if a crazy guest is thrashing the LLC, they can app
pu runs long enough. IMHO, there should
exist some heuristics to indicate when the "near-accurate" cache usage
information will be very useful to guide the scheduling decisions.
For example, another situation in my mind which does not need so
frequent sampling is that:
If a domain
2015-04-14 9:33 GMT-04:00 George Dunlap :
> On 04/14/2015 11:27 AM, wei.l...@citrix.com wrote:
> > == Hypervisor ==
> >
> > * Alternate p2m: support multiple copies of host p2m (ok)
> > - Ed White
> >
> > * Improve RTDS scheduler (none)
> > -
t;4"
handle = "0"
mac = "00:16:3e:0f:49:33"
tx-ring-ref = "768"
rx-ring-ref = "769"
event-channel = "16"
request-rx-copy = "1"
feature-rx-notify = "1"
feature-sg = "
FLINED,
PG_OFFLINE_OWNED]
I'm wondering if this is a bug in do_mmu_update() or at least some
inconsistence is in the do_mmu_update() code?
Of course, this could also be because I misunderstood something. If so,
could you please let me know what I misunderstood and how I should correct
ne ` does not take the ,
to which the belongs. I think this tool should take the
as an extra parameter just as `xen-mfndump lookup-pte `
does. When the tool construct the foreigndom for mmu, it should make
the foreigndom as ((pt_owner_id + 1 << 16) | pg_owner_id).
Am I correct?
Thank y
o
> pointed out a few things.
What you pointed out is very interesting! I will have a look at them
and then show the numbers of the measurements.
(I will also need/have to redo some experiments to see how the TSC may
affect the results, which I didn't realize before. :-( )
>
> On Wed
virtual time of the dom0, which makes it meaningless to
> compare to the latency on a physical machine.
>
> How can I get the real and highly accurate time in dom0? Thanks:)
>
>
>
You may want to try the instruction 'rdtsc' to read the timestamp counter
register
I'm not sure if I should resend the patch just to change the commit log and
add the reason of why doing this.
I want to first add the reason. If I should resend the patch set, please
let me know.
2014-11-10 7:53 GMT-05:00 George Dunlap :
> On 10/25/2014 03:16 PM, Meng Xu wrote:
>
&
2014-11-10 10:40 GMT-05:00 George Dunlap :
> On 11/10/2014 03:29 PM, Meng Xu wrote:
>
> I'm not sure if I should resend the patch just to change the commit log
> and add the reason of why doing this.
>
> I want to first add the reason. If I should resend the patch se
Faggioli
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
___
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
Sanity check input params in rt_dom_cntl();
Serialize rt_dom_cntl() against the global lock.
Signed-off-by: Meng Xu
Reviewed-by: Dario Faggioli
Reviewed-by: George Dunlap
---
xen/common/sched_rt.c | 11 +++
1 file changed, 11 insertions(+)
diff --git a/xen/common/sched_rt.c b/xen
().
Signed-off-by: Meng Xu
Reviewed-by: Dario Faggioli
---
xen/common/sched_rt.c | 12 +++-
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/xen/common/sched_rt.c b/xen/common/sched_rt.c
index 8251e41..e70d6c7 100644
--- a/xen/common/sched_rt.c
+++ b/xen/common/sched_rt.c
Sorry, the cover letter missed one line. :-(
2014-11-10 16:11 GMT-05:00 Meng Xu :
These two patches are to solve the issues found by Jan Beulich at
http://lists.xen.org/archives/html/xen-devel/2014-09/msg03554.html.
The solution is summarized by Dario Faggioli at
> http://lists.xen.org/archi
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