Hi all,
On Tue, Oct 17, 2017 at 4:10 AM, Dario Faggioli wrote:
>
> On Wed, 2017-10-11 at 14:02 -0400, Meng Xu wrote:
> > Change repl_budget event output for xentrace formats and xenalyze
> >
> > Signed-off-by: Meng Xu
> >
> I'd say:
>
> Reviewed-by:
Hi George,
On Wed, Oct 25, 2017 at 10:31 AM, Wei Liu wrote:
>
> On Mon, Oct 23, 2017 at 02:50:31PM -0400, Meng Xu wrote:
> > On Tue, Oct 17, 2017 at 4:10 AM, Dario Faggioli wrote:
> > > On Wed, 2017-10-11 at 14:02 -0400, Meng Xu wrote:
> > >> Change repl_budget
On Tue, Oct 17, 2017 at 4:10 AM, Dario Faggioli wrote:
> On Wed, 2017-10-11 at 14:02 -0400, Meng Xu wrote:
>> Change repl_budget event output for xentrace formats and xenalyze
>>
>> Signed-off-by: Meng Xu
>>
> I'd say:
>
> Reviewed-by: Dario Faggioli
Hi
to security concern.
>
> Besides the other responses you've already got, I also recall there
> being at least some CPU models that would live lock upon the
> debug store being placed into virtual space not mapped by present
> pages.
Thank you very much for your explanatio
r security reasons,
Is there any document about the possible attack via the vPMU? The
document I found (such as [1] and XSA-163) just briefly say that the
vPMU should be disabled due to security concern.
[1] https://xenbits.xen.org/docs/unstable/misc/xen-command-line.html
>
> and a
On Tue, Oct 17, 2017 at 4:10 AM, Dario Faggioli wrote:
> On Wed, 2017-10-11 at 14:02 -0400, Meng Xu wrote:
>> Change repl_budget event output for xentrace formats and xenalyze
>>
>> Signed-off-by: Meng Xu
>>
> I'd say:
>
> Reviewed-by: Dario Faggiol
On Tue, Oct 17, 2017 at 3:29 AM, Dario Faggioli wrote:
> On Tue, 2017-10-17 at 09:26 +0200, Dario Faggioli wrote:
> > On Thu, 2017-10-12 at 10:34 -0400, Meng Xu wrote:
> > > On Thu, Oct 12, 2017 at 5:02 AM, Wei Liu
> > > wrote:
> > > >
> > >
On Thu, Oct 12, 2017 at 5:02 AM, Wei Liu wrote:
>
> FYI all patches except the xentrace one were committed yesterday.
Thank you very much, Wei!
Best,
Meng
--
Meng Xu
Ph.D. Candidate in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~
Change main_sched_rtds and related output functions to support
per-VCPU extratime flag.
Signed-off-by: Meng Xu
Reviewed-by: Dario Faggioli
Acked-by: Wei Liu
---
Changes from v2
Validate the -e option input that can only be 0 or 1
Update docs/man/xl.pod.1.in
Change EXTRATIME to Extratime
es in sched_rt.c into one patch;
Minor change in variable name and comments.
Signed-off-by: Meng Xu
[PATCH v4 1/5] xen:rtds: towards work conserving RTDS
[PATCH v4 2/5] libxl: enable per-VCPU extratime flag for RTDS
[PATCH v4 3/5] xl: enable per-VCPU extratime flag for RTDS
[PATCH v4 4/5] xen
Modify libxl_vcpu_sched_params_get/set and sched_rtds_vcpu_get/set
functions to support per-VCPU extratime flag
Signed-off-by: Meng Xu
Reviewed-by: Dario Faggioli
Acked-by: Wei Liu
---
Changes from v2
1) Move extratime out of the section
that is marked as depreciated in
width
Spare bandwidth is distributed among all VCPUs with extratime flag set,
proportional to these VCPUs utilizations
Signed-off-by: Meng Xu
Reviewed-by: Dario Faggioli
---
Changes from v2
Explain how to distribute spare bandwidth in commit log
Minor change in has_extratime function without function
Revise xl tool use case by adding -e option
Remove work-conserving from TODO list
Signed-off-by: Meng Xu
Reviewed-by: Dario Faggioli
Acked-by: Wei Liu
---
No change from v2
Changes from v1
Revise rtds docs
---
docs/features/sched_rtds.pandoc | 7 ---
1 file changed, 4 insertions(+), 3
Change repl_budget event output for xentrace formats and xenalyze
Signed-off-by: Meng Xu
---
Changes from v3
Handle burn_budget event
No changes from v2
Changes from v1
Add this changes from v1
---
tools/xentrace/formats| 4 ++--
tools/xentrace/xenalyze.c | 16 +++-
2 files
On Wed, Oct 11, 2017 at 6:57 AM, Dario Faggioli wrote:
> On Tue, 2017-10-10 at 19:17 -0400, Meng Xu wrote:
>> --- a/tools/xentrace/formats
>> +++ b/tools/xentrace/formats
>> @@ -75,7 +75,7 @@
>> 0x00022801 CPU%(cpu)d %(tsc)d (+%(reltsc)8d) rtds:tickle[
>
width
Spare bandwidth is distributed among all VCPUs with extratime flag set,
proportional to these VCPUs utilizations
Signed-off-by: Meng Xu
---
Changes from v2
Explain how to distribute spare bandwidth in commit log
Minor change in has_extratime function without functionality change.
Changes fr
ol in libxl.h
Changes from RFC v1
Merge changes in sched_rt.c into one patch;
Minor change in variable name and comments.
Signed-off-by: Meng Xu
[PATCH v3 1/5] xen:rtds: towards work conserving RTDS
[PATCH v3 2/5] libxl: enable per-VCPU extratime flag for RTDS
[PATCH v3 3/5] xl: enable per-VCPU extr
Change main_sched_rtds and related output functions to support
per-VCPU extratime flag.
Signed-off-by: Meng Xu
---
Changes from v2
Validate the -e option input that can only be 0 or 1
Update docs/man/xl.pod.1.in
Change EXTRATIME to Extratime
Changes from v1
No change because we agree on using
Revise xl tool use case by adding -e option
Remove work-conserving from TODO list
Signed-off-by: Meng Xu
---
No change from v2
Changes from v1
Revise rtds docs
---
docs/features/sched_rtds.pandoc | 7 ---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/docs/features
Modify libxl_vcpu_sched_params_get/set and sched_rtds_vcpu_get/set
functions to support per-VCPU extratime flag
Signed-off-by: Meng Xu
---
Changes from v2
1) Move extratime out of the section
that is marked as depreciated in libxl_domain_sched_params.
2) Set vcpu extratime in
Change repl_budget event output for xentrace formats and xenalyze
Signed-off-by: Meng Xu
---
No changes from v2
Changes from v1
Add this changes from v1
---
tools/xentrace/formats| 2 +-
tools/xentrace/xenalyze.c | 8 +---
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a
On Wed, Sep 13, 2017 at 8:51 PM, Dario Faggioli
wrote:
>
> On Fri, 2017-09-01 at 11:58 -0400, Meng Xu wrote:
> > diff --git a/tools/xl/xl_cmdtable.c b/tools/xl/xl_cmdtable.c
> > index ba0159d..1b03d44 100644
> > --- a/tools/xl/xl_cmdtable.c
> > +++ b/tools/xl/xl_cmd
On Tue, Sep 19, 2017 at 5:23 AM, Dario Faggioli
wrote:
>
> On Fri, 2017-09-15 at 12:01 -0400, Meng Xu wrote:
> > On Wed, Sep 13, 2017 at 8:16 PM, Dario Faggioli
> > wrote:
> > >
> > > > I'm ok with what it is in this patch, although I feel that
efully, he answered your question.
If not, please feel free to ask.
I just added some very quick comment about your questions/comments below.
On Thu, Sep 28, 2017 at 5:18 AM, Andrii Anisov wrote:
> Hello,
>
>
> On 27.09.17 22:57, Meng Xu wrote:
>>
>> Note that:
>> When
If it's a (you're currently paied to look after RTDS) then we're fine.
I'm paid to look after RTDS at least before I graduate. :)
Best regards,
Meng
--
Meng Xu
Ph.D. Candidate in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
__
my
> personal email.
>
> Signed-off-by: Dario Faggioli
> ---
> Cc: Andrew Cooper
> Cc: George Dunlap
> Cc: Ian Jackson
> Cc: Jan Beulich
> Cc: Konrad Rzeszutek Wilk
> Cc: Stefano Stabellini
> Cc: Tim Deegan
> Cc: Wei Liu
> Cc: Juergen Gross
> Cc: Meng X
On Mon, Oct 2, 2017 at 1:04 PM, Dario Faggioli
wrote:
> On Mon, 2017-10-02 at 17:38 +0300, Andrii Anisov wrote:
> > Hello Meng Xu and Dario,
> >
> Hi,
>
> > On 01.09.17 18:58, Meng Xu wrote:
> > > This series of patches make RTDS scheduler work-conserv
On Wed, Sep 27, 2017 at 10:37 AM, Andrii Anisov wrote:
> Hello,
>
>
> On 27.09.17 16:57, Meng Xu wrote:
>>
>> The command is:
>> java -jar carts.jar inputfile outputfile
>
> From the next example, I would say the command is:
> java -jar carts.jar inpu
Hi Andrii,
On Wed, Sep 27, 2017 at 8:37 AM, Andrii Anisov wrote:
>
> Dear Meng Xu,
>
>
> On 22.08.17 05:02, Meng Xu wrote:
>>
>> Given the set of tasks in each VM, we compute the VCPUs' periods and
>> budgets, using the CARTS tool [1]. Note that each
On Wed, Sep 13, 2017 at 8:16 PM, Dario Faggioli
wrote:
> On Fri, 2017-09-01 at 12:03 -0400, Meng Xu wrote:
>> On Fri, Sep 1, 2017 at 11:58 AM, Meng Xu
>> wrote:
>> > @@ -705,6 +717,12 @@ static int sched_rtds_domain_set(libxl__gc
>> > *gc, uint32_t domid,
&
Hi Dario,
On Wed, Sep 13, 2017 at 9:06 PM, Dario Faggioli
wrote:
>
> On Fri, 2017-09-01 at 11:58 -0400, Meng Xu wrote:
> > Make RTDS scheduler work conserving without breaking the real-time
> > guarantees.
> >
> > VCPU model:
> > Each real-time VCPU is extend
type,
> - make x86's paging_domctl() and descendants take a properly typed
> handle,
> - add const in a few places.
>
> Signed-off-by: Jan Beulich
Acked-by: Meng Xu
Thanks,
Meng
--
Meng Xu
Ph.D. Candidate in Computer and Information Science
University of Penn
Dario,
I didn't include your Reviewed-by tag because I made one small change.
On Fri, Sep 1, 2017 at 11:58 AM, Meng Xu wrote:
>
> Modify libxl_vcpu_sched_params_get/set and sched_rtds_vcpu_get/set
> functions to support per-VCPU extratime flag
>
> Signed-off-by: Meng Xu
&g
Revise xl tool use case by adding -e option
Remove work-conserving from TODO list
Signed-off-by: Meng Xu
---
Changes from v1
Revise rtds docs
---
docs/features/sched_rtds.pandoc | 7 ---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/docs/features/sched_rtds.pandoc b/docs
name and comments.
Signed-off-by: Meng Xu
[PATCH v2 1/5] xen:rtds: towards work conserving RTDS
[PATCH v2 2/5] libxl: enable per-VCPU extratime flag for RTDS
[PATCH v2 3/5] xl: enable per-VCPU extratime flag for RTDS
[PATCH v2 4/5] xentrace: enable per-VCPU extratime flag for RTDS
[PATCH v2 5/5]
Modify libxl_vcpu_sched_params_get/set and sched_rtds_vcpu_get/set
functions to support per-VCPU extratime flag
Signed-off-by: Meng Xu
---
Changes from v1
1) Add LIBXL_HAVE_SCHED_RTDS_VCPU_EXTRA to indicate if extratime flag is
supported
2) Change flag name in domctl.h from
Change main_sched_rtds and related output functions to support
per-VCPU extratime flag.
Signed-off-by: Meng Xu
---
Changes from v1
No change because we agree on using -e 0/1 option to
set if a vcpu will get extra time or not
Changes from RFC v1
Changes work_conserving flag to extratime flag
Change repl_budget event output for xentrace formats and xenalyze
Signed-off-by: Meng Xu
---
Changes from v1
Add this changes from v1
---
tools/xentrace/formats| 2 +-
tools/xentrace/xenalyze.c | 8 +---
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/tools/xentrace
Queue management:
Run queue holds VCPUs with extratime flag set and VCPUs with
remaining budget. Run queue is sorted in increasing order of VCPUs priorities.
Depleted queue holds VCPUs which have extratime flag cleared and depleted
budget.
Replenished queue is not modified.
Signed-off-by: Meng Xu
---
Ch
c| 2 +-
> xen/arch/x86/mm/hap/hap.c | 2 +-
> 8 files changed, 63 insertions(+), 29 deletions(-)
How many VCPUs for a single VM do you want to support with this patch set?
Thanks,
Meng
--
---
Meng Xu
PhD Candidate in Computer and Informa
==
>
> * Per-cpu tasklet
> - XEN-28
> - Konrad Rzeszutek Wilk
>
> * Add support of rcu_idle_{enter,exit}
> - XEN-27
> - Dario Faggioli
I'm moving the RTDS scheduler to work-conserving scheduler.
The first version of the patch series has been posted at
http
On Mon, Aug 21, 2017 at 4:38 AM, Andrii Anisov wrote:
>
> On 18.08.17 23:43, Meng Xu wrote:
>>
>> Sure. The workload we used in the paper is mainly the cpu-intensive task.
>> We first calibrate a busy-loop of multiplications that runs for 1ms.
>> Then for a task
On Mon, Aug 21, 2017 at 4:16 AM, Andrii Anisov wrote:
>
> On 21.08.17 11:07, Andrii Anisov wrote:
>>
>> Hello Meng Xu,
>>
>>
>> On 18.08.17 23:43, Meng Xu wrote:
>>>
>>> The Section 4.1 and 4.2 in [1] explained the whole experiment steps.
&
On Mon, Aug 21, 2017 at 4:07 AM, Andrii Anisov wrote:
>
> Hello Meng Xu,
>
>
> On 18.08.17 23:43, Meng Xu wrote:
>>
>> The Section 4.1 and 4.2 in [1] explained the whole experiment steps.
>> If you have any question or confusion on a specific step, please feel
>
Hi Andrii,
On Tue, Aug 1, 2017 at 4:02 AM, Andrii Anisov wrote:
> Hello Meng Xu,
>
> I've get back to this stuff.
Sorry for the late response. I'm not sure if you have already solved this.
>
>
> On 03.07.17 17:58, Andrii Anisov wrote:
>>
>> That'
On Wed, Aug 9, 2017 at 3:32 AM, Dario Faggioli
wrote:
> On Tue, 2017-08-08 at 15:55 -0700, Meng Xu wrote:
>> On Tue, Aug 8, 2017 at 3:24 PM, Dario Faggioli
>> wrote:
>> >
>> > Therefore, I think I would set extratime as on by default in both
>&
On Tue, Aug 8, 2017 at 3:52 PM, Dario Faggioli
wrote:
> On Tue, 2017-08-08 at 12:06 -0700, Meng Xu wrote:
>> On Tue, Aug 8, 2017 at 10:57 AM, Dario Faggioli
>> wrote:
>> > On Sun, 2017-08-06 at 12:22 -0400, Meng Xu wrote:
>> > >
>> > > diff
On Tue, Aug 8, 2017 at 3:24 PM, Dario Faggioli
wrote:
> On Tue, 2017-08-08 at 12:16 -0700, Meng Xu wrote:
>> On Tue, Aug 8, 2017 at 9:09 AM, Dario Faggioli
>> wrote:
>> > On Sun, 2017-08-06 at 22:43 -0400, Meng Xu wrote:
>> > >
>> > > As to (1)
On Tue, Aug 8, 2017 at 9:09 AM, Dario Faggioli
wrote:
> On Sun, 2017-08-06 at 22:43 -0400, Meng Xu wrote:
>> On Sun, Aug 6, 2017 at 12:22 PM, Meng Xu
>> wrote:
>> >
>> > diff --git a/tools/xl/xl_cmdtable.c b/tools/xl/xl_cmdtable.c
>> > index 2
On Tue, Aug 8, 2017 at 10:57 AM, Dario Faggioli
wrote:
> On Sun, 2017-08-06 at 12:22 -0400, Meng Xu wrote:
>> Make RTDS scheduler work conserving without breaking the real-time
>> guarantees.
>>
>> VCPU model:
>> Each real-time VCPU is extended to have an extra
On Mon, Aug 7, 2017 at 3:14 PM, Dario Faggioli
wrote:
> On Mon, 2017-08-07 at 14:27 -0400, Meng Xu wrote:
>> On Mon, Aug 7, 2017 at 1:35 PM, Dario Faggioli
>>
>> > Is this wanted or expected?
>>
>> It is wanted.
>>
>> A VCPU i that has already go
On Mon, Aug 7, 2017 at 1:35 PM, Dario Faggioli
wrote:
> On Sat, 2017-08-05 at 17:35 -0400, Meng Xu wrote:
>> >
>> > > @@ -966,8 +1001,16 @@ burn_budget(const struct scheduler *ops,
>> > > struct
>> > > rt_vcpu *svc, s_time_t n
On Sun, Aug 6, 2017 at 12:22 PM, Meng Xu wrote:
> Change main_sched_rtds and related output functions to support
> per-VCPU extratime flag.
>
> Signed-off-by: Meng Xu
>
> ---
> Changes from RFC v1
> Changes work_conserving flag to extratime flag
> ---
> tools/xl/x
Minor change in variable name and comments.
Signed-off-by: Meng Xu
[PATCH v1 1/3] xen:rtds: towards work conserving RTDS
[PATCH v1 2/3] libxl: enable per-VCPU extratime flag for RTDS
[PATCH v1 3/3] xl: enable per-VCPU extratime flag for RTDS
___
Xen-
Modify libxl_vcpu_sched_params_get/set and sched_rtds_vcpu_get/set
functions to support per-VCPU extratime flag
Signed-off-by: Meng Xu
---
Changes from RFC v1
Change work_conserving flag to extratime flag
---
tools/libxl/libxl_sched.c | 12
1 file changed, 12 insertions(+)
diff
Change main_sched_rtds and related output functions to support
per-VCPU extratime flag.
Signed-off-by: Meng Xu
---
Changes from RFC v1
Changes work_conserving flag to extratime flag
---
tools/xl/xl_cmdtable.c | 3 ++-
tools/xl/xl_sched.c| 56
Queue management:
Run queue holds VCPUs with extratime flag set and VCPUs with
remaining budget. Run queue is sorted in increasing order of VCPUs priorities.
Depleted queue holds VCPUs which have extratime flag cleared and depleted
budget.
Replenished queue is not modified.
Signed-off-by: Meng Xu
---
Ch
es how many times the VCPU gets
the extra budget in the current period.
>
>> +svc->cur_budget = svc->budget;
>> +}
>> +else
>> + {
>> +svc->cur_budget = 0;
>> +__set_bit(__RTDS_depleted, &svc->fl
On Fri, Aug 4, 2017 at 10:34 AM, Wei Liu wrote:
> On Fri, Aug 04, 2017 at 02:53:51PM +0200, Dario Faggioli wrote:
>> On Fri, 2017-08-04 at 13:10 +0100, Wei Liu wrote:
>> > On Fri, Aug 04, 2017 at 10:13:18AM +0200, Dario Faggioli wrote:
>> > > On Thu, 2017-08-03
On Fri, Aug 4, 2017 at 5:01 AM, Dario Faggioli
wrote:
> On Thu, 2017-08-03 at 18:02 -0400, Meng Xu wrote:
>> On Thu, Aug 3, 2017 at 12:03 PM, Dario Faggioli
>> wrote:
>> >
>> > > @@ -702,14 +705,18 @@ int main_sched_rtds(int argc, char **argv)
>> >
On Thu, Aug 3, 2017 at 12:03 PM, Dario Faggioli
wrote:
> On Tue, 2017-08-01 at 14:33 -0400, Meng Xu wrote:
>> --- a/tools/xl/xl_cmdtable.c
>> +++ b/tools/xl/xl_cmdtable.c
>> @@ -272,12 +272,13 @@ struct cmd_spec cmd_table[] = {
>> { "sched-rtds&qu
On Thu, Aug 3, 2017 at 11:53 AM, Dario Faggioli
wrote:
> On Tue, 2017-08-01 at 14:33 -0400, Meng Xu wrote:
>> diff --git a/tools/libxl/libxl_types.idl
>> b/tools/libxl/libxl_types.idl
>> index 8a9849c..f6c3ead 100644
>> --- a/tools/libxl/libxl_types.idl
>>
On Thu, Aug 3, 2017 at 11:47 AM, Dario Faggioli
wrote:
> On Tue, 2017-08-01 at 14:33 -0400, Meng Xu wrote:
>> --- a/xen/include/public/domctl.h
>> +++ b/xen/include/public/domctl.h
>> @@ -360,6 +360,7 @@ typedef struct xen_domctl_sched_credit2 {
>> typedef s
On Wed, Aug 2, 2017 at 1:49 PM, Dario Faggioli
wrote:
> On Tue, 2017-08-01 at 14:33 -0400, Meng Xu wrote:
>> This series of patches enable the toolstack to
>> set and get per-VCPU work-conserving flag.
>> With the toolstack, system administrators can decide
>> wh
s for it
> to have a work conserving mode! :-)
Glad to hear that. :-)
>
> On Tue, 2017-08-01 at 14:13 -0400, Meng Xu wrote:
>> Make RTDS scheduler work conserving to utilize the idle resource,
>> without breaking the real-time guarantees.
>
> Just kill the "to u
there is an idle core, making these
VCPUs unnecessarily starve for one period.
Therefore, always make sure that we only tickle PCPUs that have not
been tickled already.
Signed-off-by: Haoran Li
Signed-off-by: Meng Xu
Reviewed-by: Dario Faggioli
---
The initial discussion of this patch can be
there is an idle core, making these
VCPUs unnecessarily starve for one period.
Therefore, always make sure that we only tickle PCPUs that have not
been tickled already.
Signed-off-by: Haoran Li
Signed-off-by: Meng Xu
---
The initial discussion of this patch can be found at
https
On Tue, Aug 1, 2017 at 2:33 PM, Meng Xu wrote:
>
> This series of patches enable the toolstack to
> set and get per-VCPU work-conserving flag.
> With the toolstack, system administrators can decide
> which VCPUs will be made work-conserving.
>
> The design of the wor
,
which is this series of patches.
Signed-off-by: Meng Xu
___
Xen-devel mailing list
Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
Change main_sched_rtds and related output functions to support
per-VCPU work conserving flag.
Signed-off-by: Meng Xu
---
tools/xl/xl_cmdtable.c | 3 ++-
tools/xl/xl_sched.c| 56 ++
2 files changed, 40 insertions(+), 19 deletions(-)
diff
Extend the hypercalls(XEN_DOMCTL_SCHEDOP_getvcpuinfo/putvcpuinfo) to
get/set a domain's per-VCPU work conserving parameters.
Signed-off-by: Meng Xu
---
xen/common/sched_rt.c | 2 ++
xen/include/public/domctl.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/xen/common/sched_r
Modify libxl_vcpu_sched_params_get/set and sched_rtds_vcpu_get/set
functions to support per-VCPU work conserving flag
Signed-off-by: Meng Xu
---
tools/libxl/libxl.h | 1 +
tools/libxl/libxl_sched.c | 3 +++
tools/libxl/libxl_types.idl | 2 ++
3 files changed, 6 insertions(+)
diff
level but has a smaller deadline
Signed-off-by: Meng Xu
---
xen/common/sched_rt.c | 71 ++-
1 file changed, 59 insertions(+), 12 deletions(-)
diff --git a/xen/common/sched_rt.c b/xen/common/sched_rt.c
index 39f6bee..740a712 100644
--- a/xen/c
On Fri, Jun 23, 2017 at 6:55 AM, Dario Faggioli
wrote:
>
> Nothing changed in `pahole` output, in terms of holes
> and padding, but some fields have been moved, to put
> related members in same cache line.
>
> Signed-off-by: Dario Faggioli
> ---
> Cc: Meng Xu
> Cc:
On Mon, Jul 10, 2017 at 1:25 AM, Yi Sun wrote:
> On 17-07-07 12:37:28, Meng Xu wrote:
>> > + Sample cache capacity bitmasks for a bitlength of 8 are shown below.
>> > Please
>> > + note that all (and only) contiguous '1' combinations are allowed (e.g
t to argue about the real-time timing properties required
by some safety-critical systems' standard, such as the ISO-26262 for
automotive systems, the system support (such as the RTDS scheduler),
the correct configuration of the system, and the analysis computation
and analysis will be required
On Wed, Jul 5, 2017 at 4:51 AM, Dario Faggioli
wrote:
> On Mon, 2017-07-03 at 14:42 -0400, Meng Xu wrote:
>> On Mon, Jul 3, 2017 at 10:58 AM, Andrii Anisov > m> wrote:
>> >
>> Once the scheduling policy is determined, you will need to configure
>> the VC
On Wed, Jul 5, 2017 at 4:29 AM, Dario Faggioli
wrote:
> On Tue, 2017-07-04 at 11:12 -0400, Meng Xu wrote:
>> On Tue, Jul 4, 2017 at 8:28 AM, Andrii Anisov > > wrote:
>> >
>> > So you are suggesting to introduce more RT schedulers with
>> > different algo
indexed by COS ID.
> +
> + - Member `dom_ids`
> +
> +`dom_ids` is a bitmap, every bit corresponds to a domain. Index is
> + domain_id. It is used to help restore domain_id to 0 when a socket is
> +offline and then online ag
On Tue, Jul 4, 2017 at 8:28 AM, Andrii Anisov wrote:
>
>
> On 03.07.17 21:42, Meng Xu wrote:
>>
>> As far as I know, there is no known issue for ARM as long as that
>> version Xen runs on the ARM board.
>
> That's good.
>>
>> I assume you have
On Mon, Jul 3, 2017 at 10:58 AM, Andrii Anisov wrote:
> Hello Meng Xu,
>
>
> On 03.07.17 16:35, Meng Xu wrote:
>>>
>>> Do you have any recommendations or suggestions?
>>
>> Which experiment/use case do you plan to run?
>> What are the requireme
ady.
>
> Signed-off-by: Haoran Li
> Reviewed-by: Meng Xu
As Dario mentioned in the email, the title should be changed and the
email should be a new email thread, instead of a forward email.
A reference to the format of sending a newer version of patch can be
found at https://www.m
On Mon, Jul 3, 2017 at 7:03 AM, Andrii Anisov wrote:
>
> Dear Meng Xu,
Hi Andrii,
>
>
> We are going to evaluate an RTDS scheduler on ARM.
>
>
> Basically I'm going to repeat use-cases described in
> https://www.cis.upenn.edu/~linhphan/papers/emsoft14-rt-xen.pdf
tried to set MSR_CORE_PERF_GLOBAL_OVF_CTRL to 0xf, but the
register's content is not changed. :(
Maybe I should set the MSR_CORE_PERF_GLOBAL_OVF_CTRL to 0xF to enable
the overflow interrupt?
Thank you very much for your time and help!
Meng
---
Meng Xu
PhD Candidate in Computer and Information Science
U
[Sorry, I cc.ed Quan's previous email at Intel. Change to his current email.]
On Fri, Mar 31, 2017 at 11:41 AM, Meng Xu wrote:
> Hi Jan and Boris,
>
> I'm Meng Xu from the University of Pennsylvania.
>
> I'm wondering:
> How does Xen (vpmu) handle the gener
Hi Jan and Boris,
I'm Meng Xu from the University of Pennsylvania.
I'm wondering:
How does Xen (vpmu) handle the general performance counter's overflow interrupt?
Could you point me to the function handler, if Xen does handle it?
---What I want to achieve---
I'm look
cpumask_clear_cpu(cpu, ¬_tickled);
> +cpu = cpumask_cycle(cpu, ¬_tickled);
> }
>
> -/* 3) candicate has higher priority, kick out lowest priority vcpu */
> +/* 2) candicate has higher priority, kick out lowest priority vcpu */
> if (
now. I guess I downloaded the old version. :-)
I found this MBA feature is interesting. Is there any processor on the
market we can purchase?
We'd like to evaluate this feature. ;-)
Thanks,
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
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tel.com/content/www/us/en/processors/architectures-software-developer-manuals.html)
> +
I checked the document. The CAT is in Chapter 17.17. However, there is
no description about the MBA? ;-)
Thanks,
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
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cpumask_test_cpu(new->vcpu->processor, ¬_tickled))
You should have a space before the last ).
Can you resend the patch with the comment resolved?
Thanks,
Meng
--
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
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ore=,00ff
> RUNQ:
> 0: [0.1] flags=0 cpu=2 credit=6561215 [w=256] load=262144 (~100%)
> 1: [0.2] flags=0 cpu=2 credit=5812356 [w=256] load=262144 (~100%)
>
> Stop printing details of idle vCPUs also in Credit1
> and RTDS (they're pretty useless in
27;t remember).
> > >
> > > That being said, it's not that I can't live with the added "idle"
> > > indication. But I like it less and would prefer not to add it.
> >
> > Sure! I was thinking if we should even avoid printing out the idle
>
On Thu, Jan 26, 2017 at 5:08 PM, Dario Faggioli
wrote:
> On Thu, 2017-01-26 at 13:59 -0500, Meng Xu wrote:
>> Hi Dario,
>>
> Hi,
>
>> On Thu, Jan 26, 2017 at 11:52 AM, Dario Faggioli
>> wrote:
>> >
>> > Runqueue 0:
>> > CPU[0
2144 (~100%)
>
> Stop printing details of idle vCPUs also in Credit1
> and RTDS (they're pretty useless in there too).
>
> Signed-off-by: Dario Faggioli
> ---
> Cc: George Dunlap
> Cc: Anshul Makkar
> Cc: Meng Xu
> ---
> xen/common/sched_credit.c |6 ++--
in burn_budget function in sched_rt.c .
>
> Again, thanks a lot for your help.
:-)
Meng
>
>
> Quoting Meng Xu :
>
>> [cc. Dario and George]
>>
>> On Fri, Jan 6, 2017 at 1:34 PM, wy11 wrote:
>>>
>>> Dear Xen developers,
>>
>>
>> Hi,
&
ock source TSC with a granularity of
> nanoseconds. I'd like to know if there is any reason that the Xen hypervisor
> does not choose a nanosecond scheduler?
What do you mean by a nanosecond scheduler? In the kernel, scheduler
accounts the budget in nanoseconds.
Meng
--
ybe
he has a repo. for the kernel.
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
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I'm at EST (GMT-5).
Thank you very much!
Meng
---
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
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beyond
> +
I'm interested in trying out your code.
I'm planning to purchase a SoC with the Atom Goldmont processors.
Do you have some suggestions about the SoC I should purchase?
I would prefer to use the same
"QEMU xen-blkback performance analysis and
> improvements", as shown in
> https://wiki.xenproject.org/wiki/Outreach_Program_Projects.
You can use to highlight the sentence.
People use the plain text in the ML. :-)
Meng
--
---
Meng Xu
PhD Student in Computer and
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