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* [PATCH 00/16] Fixes and improvement (including hard affinity!) for Credit2
@ 2016-03-18 19:03 Dario Faggioli
  2016-03-18 19:04 ` [PATCH 01/16] xen: sched: fix locking when allocating an RTDS pCPU Dario Faggioli
                   ` (15 more replies)
  0 siblings, 16 replies; 61+ messages in thread
From: Dario Faggioli @ 2016-03-18 19:03 UTC (permalink / raw)
  To: xen-devel
  Cc: Juergen Gross, Justin Weaver, George Dunlap, Tianyang Chen,
	Robert VanVossen, Uma Sharma, Josh Whitehead, Meng Xu,
	Jan Beulich

Hi everyone,

This series implements a bunch of both bugfixes and improvements for scheduling
in general, but mostly for Credit2.

Almost all the patches have actually been posted already (so that's why some of
them have a mention of what changed since v1), but I felt like the best thing
was just to put together a new series containing them all (and hence I'm
considering this here to be version 1 of it).

So, quickly, what we do is:
 a) fix a potential race and an actual ASSERT(), when moving pCPUs around
    cpupools;
 b) fix how Credit2 constructs its runqueue;
 c) implement hard affinity in Credit2;
 d) a couple more (minor) fixes and improvements.

In particular, to make a) possible, quite a few restructuring of the way in
which we deal with pCPUs changing scheduler when they move between pools
(basically, in schedule_cpu_switch()) has been necessary.

That also helped making b) possible, so it was a win-win. :-)

And finally, yes, I know it's late in this release cycle, but still would like
to give this series a chance to get in Xen 4.7. (BTW, technically, it's really
mostly bugfixing, the only exception being hard affinity for Credit2).

Thanks and Regards,
Dario

---
Dario Faggioli (14):
      xen: sched: fix locking when allocating an RTDS pCPU
      xen: sched: add .init_pdata hook to the scheduler interface
      xen: sched: make implementing .alloc_pdata optional
      xen: sched: implement .init_pdata in all schedulers
      xen: sched: move pCPU initialization in an helper
      xen: sched: prepare a .switch_sched hook for Credit1
      xen: sched: prepare a .switch_sched hook for Credit2
      xen: sched: prepare a .switch_sched hook for Credit2
      xen: sched: close potential races when switching scheduler to CPUs
      xen: sched: on Credit2, don't reprogram the timer if idle
      xen: sched: fix per-socket runqueue creation in credit2
      xen: sched: allow for choosing credit2 runqueues configuration at boot
      xen: sched: per-core runqueues as default in credit2
      xen: sched: scratch space for cpumasks on Credit2

Justin Weaver (1):
      xen: sched: implement vcpu hard affinity in Credit2

Uma Sharma (1):
      xen: sched: improve credit2 bootparams' scope, placement and signedness

 docs/misc/xen-command-line.markdown |   19 +
 xen/common/sched_arinc653.c         |   31 --
 xen/common/sched_credit.c           |   75 +++++-
 xen/common/sched_credit2.c          |  467 +++++++++++++++++++++++++----------
 xen/common/sched_rt.c               |   69 ++++-
 xen/common/schedule.c               |   53 +++-
 xen/include/xen/sched-if.h          |    5 
 7 files changed, 505 insertions(+), 214 deletions(-)
--
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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^ permalink raw reply	[flat|nested] 61+ messages in thread

end of thread, other threads:[~2016-04-06 16:21 UTC | newest]

Thread overview: 61+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-03-18 19:03 [PATCH 00/16] Fixes and improvement (including hard affinity!) for Credit2 Dario Faggioli
2016-03-18 19:04 ` [PATCH 01/16] xen: sched: fix locking when allocating an RTDS pCPU Dario Faggioli
2016-03-19  2:22   ` Meng Xu
2016-03-23 15:37   ` George Dunlap
2016-03-18 19:04 ` [PATCH 02/16] xen: sched: add .init_pdata hook to the scheduler interface Dario Faggioli
2016-03-22  8:08   ` Juergen Gross
2016-03-23 17:32   ` George Dunlap
2016-03-18 19:04 ` [PATCH 03/16] xen: sched: make implementing .alloc_pdata optional Dario Faggioli
2016-03-19  2:23   ` Meng Xu
2016-03-21 14:22   ` Jan Beulich
2016-03-23 17:36     ` George Dunlap
2016-03-24  9:43       ` Jan Beulich
2016-03-24 13:14         ` Dario Faggioli
2016-03-21 14:48   ` Juergen Gross
2016-03-21 15:07     ` Jan Beulich
2016-04-01 17:01       ` Dario Faggioli
2016-04-04  4:21         ` Juergen Gross
2016-04-04  6:13         ` Jan Beulich
2016-04-05 16:01           ` Dario Faggioli
2016-03-23 17:38   ` George Dunlap
2016-03-18 19:04 ` [PATCH 04/16] xen: sched: implement .init_pdata in all schedulers Dario Faggioli
2016-03-19  2:24   ` Meng Xu
2016-03-22  8:03   ` Juergen Gross
2016-03-23 17:46     ` George Dunlap
2016-03-18 19:04 ` [PATCH 05/16] xen: sched: move pCPU initialization in an helper Dario Faggioli
2016-03-23 17:51   ` George Dunlap
2016-03-23 18:09     ` George Dunlap
2016-03-24 13:21     ` Dario Faggioli
2016-03-18 19:04 ` [PATCH 06/16] xen: sched: prepare a .switch_sched hook for Credit1 Dario Faggioli
2016-03-18 19:04 ` [PATCH 07/16] xen: sched: prepare a .switch_sched hook for Credit2 Dario Faggioli
2016-03-18 19:04 ` [PATCH 08/16] " Dario Faggioli
2016-03-19  2:24   ` Meng Xu
2016-03-21 14:25   ` Jan Beulich
2016-03-18 19:05 ` [PATCH 09/16] xen: sched: close potential races when switching scheduler to CPUs Dario Faggioli
2016-03-19  2:25   ` Meng Xu
2016-03-23 19:05   ` George Dunlap
2016-04-05 16:26     ` Dario Faggioli
2016-04-06 15:51       ` Dario Faggioli
2016-03-24 12:14   ` George Dunlap
2016-04-05 17:37     ` Dario Faggioli
2016-04-06 16:21       ` Dario Faggioli
2016-03-18 19:05 ` [PATCH 10/16] xen: sched: improve credit2 bootparams' scope, placement and signedness Dario Faggioli
2016-03-21 14:51   ` Juergen Gross
2016-03-24 12:20   ` George Dunlap
2016-03-18 19:05 ` [PATCH 11/16] xen: sched: on Credit2, don't reprogram the timer if idle Dario Faggioli
2016-03-24 15:03   ` George Dunlap
2016-03-18 19:05 ` [PATCH 12/16] xen: sched: fix per-socket runqueue creation in credit2 Dario Faggioli
2016-03-24 12:24   ` George Dunlap
2016-03-18 19:05 ` [PATCH 13/16] xen: sched: allow for choosing credit2 runqueues configuration at boot Dario Faggioli
2016-03-22  7:46   ` Juergen Gross
2016-03-24 12:36   ` George Dunlap
2016-03-18 19:05 ` [PATCH 14/16] xen: sched: per-core runqueues as default in credit2 Dario Faggioli
2016-03-24 12:37   ` George Dunlap
2016-03-18 19:06 ` [PATCH 15/16] xen: sched: scratch space for cpumasks on Credit2 Dario Faggioli
2016-03-18 19:27   ` Andrew Cooper
2016-03-24 12:44     ` George Dunlap
2016-03-24 12:56       ` Andrew Cooper
2016-03-24 13:10       ` Dario Faggioli
2016-03-18 19:06 ` [PATCH 16/16] xen: sched: implement vcpu hard affinity in Credit2 Dario Faggioli
2016-03-24 15:42   ` George Dunlap
2016-04-05 16:50     ` Dario Faggioli

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