Re: [Xen-devel] [PATCH] xen/sched: rt: Fix typo in a comment

eld. > * + Set when chosen as next in rt_schedule(). > * + Cleared after context switch has been saved in rt_context_saved() > -- > 2.24.0 > Reviewed-by: Meng Xu Cheers, Meng ___ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel

Re: [Xen-devel] [PATCH v2 7/9] xen/sched: switch scheduling to bool where appropriate

> xen/include/xen/sched.h | 6 +++--- > 7 files changed, 35 insertions(+), 35 deletions(-) > As to xen/common/sched/rt.c, Reviewed-by: Meng Xu Cheers, Meng ___ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel

Re: [Xen-devel] [PATCH v2 5/9] xen/sched: use scratch cpumask instead of allocating it on the stack

ommon/sched/rt.c | 56 > ++- > 1 file changed, 37 insertions(+), 19 deletions(-) > Reviewed-by: Meng Xu Meng ___ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel

Re: [Xen-devel] [PATCH v2 9/9] xen/sched: add const qualifier where appropriate

--- > xen/common/sched/rt.c | 32 ++-- > xen/include/xen/sched.h | 9 > 8 files changed, 96 insertions(+), 89 deletions(-) > As to xen/common/sched/rt.c, Acked-by: Meng Xu Meng ___ Xen-devel mailing list Xen-deve

Re: [Xen-devel] Xen optimization

Hi Milan, On Thu, Oct 11, 2018 at 12:36 AM Milan Boberic wrote: > > On Wed, Oct 10, 2018 at 6:41 PM Meng Xu wrote: > > > > The jitter may come from Xen or the OS in dom0. > > It will be useful to know what is the jitter if you run the test on > > PetaLinux. >

Re: [Xen-devel] Xen optimization

[Just add some thoughts on this.] On Wed, Oct 10, 2018 at 4:22 AM Milan Boberic wrote: > > Hi, > sorry, my explanation wasn't precise and I missed the point. > vCPU pinning with sched=null I put "just in case", because it doesn't hurt. > > Yes, PetaLinux domain is dom0. The jitter may come

Re: [Xen-devel] [PATCH] sched/rt: Fix build after c/s c3715dd8fb766

^ > 1 error generated. > > when compiling with Clang. Drop the function. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> > --- Reviewed-by: Meng Xu <men...@cis.upenn.edu> Thank you very much! Meng ___

Re: [Xen-devel] [PATCH 4/6] xen/sched: Remove {init, destroy}_domain() interfaces

om_init 52 - -52 > null_dom_init 52 - -52 > csched_dom_init 52 - -52 > csched2_dom_init 52 - -52 > > Signed-off-by: Andrew

Re: [Xen-devel] [PATCH 3/6] xen/sched: Improvements to the {alloc, free}_domdata() interfaces

erated code is better, and there can be proper > per-hook defaults and checks. > > Callers of the alloc hooks are switched to using IS_ERR(), rather than > checking for NULL. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> > --- Acked-by: Meng Xu <men...@

Re: [Xen-devel] Is there any way to read msr in hypervisor code?

your own feature. Best Regards, Meng --- Meng Xu Ph.D. Candidate in Computer and Information Science University of Pennsylvania http://www.cis.upenn.edu/~mengxu/ > > > On Tue, Feb 27, 2018 at 11:03 PM, Andrew Cooper <andrew.coop...@citrix.com> > wrote: >> >&

Re: [Xen-devel] RTDS with extra time issue

On Mon, Feb 12, 2018 at 6:08 AM, Andrii Anisov wrote: > > Dario, Meng, > > > On 12.02.18 12:17, Dario Faggioli wrote: >> >> Well, I'll let Andrii reply, but honestly, I don't think it is. >> >> See, for instance, the fact that DomR has only 1 vCPU, so I find it >> unlikely

Re: [Xen-devel] RTDS with extra time issue

> > It looks like DomR's vCPU does get 50% of CPU time, so it's not that > other vCPUs are preventing it to exploit all its own reservation. If > that would have not been the case, there'd be a bug in the scheduler. > > By giving the vCPU 100% (either via "budget == period" or with > extratime),

Re: [Xen-devel] RTDS with extra time issue

On Fri, Feb 9, 2018 at 10:56 AM, Andrii Anisov <andrii_ani...@epam.com> wrote: > Hello Meng Xu, > > > On 09.02.18 17:36, Meng Xu wrote: >> >> Another way to check if there is interference from services in domR is >> to set period = budget for the domR's VCP

Re: [Xen-devel] RTDS with extra time issue

now, just to understand things better, can you enable > extratime for DomR as well, and report what you see in xentop, and > whether or not you still see deadline misses? > Another way to check if there is interference from services in domR is to set period = budget for th

Re: [Xen-devel] RTDS with extra time issue

d of two RT tasks with the same utilization is different: the task with smaller period has larger demand. ​Best, Meng​ --- Meng Xu Ph.D. Candidate in Computer and Information Science University of Pennsylvania http://www.cis.upenn.edu/~mengxu/

Re: [Xen-devel] [PATCH] xen/sched_rt: Move repl_timer into struct rt_private

44 20 -24 > rt_init 219 136 -83 > > As an extra bit of cleanup noticed while making this change, there is no need > to call cpumask_clear() on an zeroed memory allocation. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.co

Re: [Xen-devel] [PATCH] MAINTAINERS: update my entries to new email address.

;ian.jack...@eu.citrix.com> > Cc: Jan Beulich <jbeul...@suse.com> > Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com> > Cc: Stefano Stabellini <sstabell...@kernel.org> > Cc: Tim Deegan <t...@xen.org> > Cc: Wei Liu <wei.l...@citrix.com> > Cc: Jue