From: "Jan Beulich" <JBeulich@suse.com>
To: Julien Grall <julien.grall@arm.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Juergen Gross <jgross@suse.com>
Cc: Tim Deegan <tim@xen.org>, Kevin Tian <kevin.tian@intel.com>,
Wei Liu <wei.liu2@citrix.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
George Dunlap <George.Dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Robert VanVossen <Robert.VanVossen@dornerworks.com>,
Dario Faggioli <dfaggioli@suse.com>,
Paul Durrant <paul.durrant@citrix.com>,
Joshua Whitehead <josh.whitehead@dornerworks.com>,
Meng Xu <mengxu@cis.upenn.edu>,
Jun Nakajima <jun.nakajima@intel.com>,
xen-devel <xen-devel@lists.xenproject.org>,
Roger Pau Monne <roger.pau@citrix.com>
Subject: Re: [PATCH RFC 00/49] xen: add core scheduling support
Date: Mon, 01 Apr 2019 01:13:16 -0600 [thread overview]
Message-ID: <5CA1BA0C0200007800223659@prv1-mh.provo.novell.com> (raw)
In-Reply-To: <10544c22-138e-c993-ca7f-3a3392e03243@suse.com>
>>> On 01.04.19 at 08:49, <jgross@suse.com> wrote:
> On 01/04/2019 08:41, Jan Beulich wrote:
>>>>> On 29.03.19 at 16:08, <jgross@suse.com> wrote:
>>> Via boot parameter sched_granularity=core (or sched_granularity=socket)
>>> it is possible to change the scheduling granularity from thread (the
>>> default) to either whole cores or even sockets.
>>
>> One further general question came to mind: How about also having
>> "sched-granularity=thread" (or "...=none") to retain current
>> behavior, at least to have an easy way to compare effects if
>> wanted? But perhaps also to allow to deal with potential resources
>> wasting configurations like having mostly VMs with e.g. an odd
>> number of vCPU-s.
>
> Fine with me.
>
>> The other question of course is whether the terms thread, core,
>> and socket are generic enough to be used in architecture
>> independent code. Even on x86 it already leaves out / unclear
>> where / how e.g. AMD's compute units would be classified. I
>> don't have any good suggestion for abstraction, so possibly
>> the terms used may want to become arch-specific.
>
> I followed the already known terms from the credit2_runqueue
> parameter. I think they should match. Which would call for
> "sched-granularity=cpu" instead of "thread".
"cpu" is fine of course. I wonder though whether the other two
were a good choice for "credit2_runqueue". Stefano, Julien -
is this terminology at least half way suitable for Arm?
Jan
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prev parent reply other threads:[~2019-04-01 7:13 UTC|newest]
Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-29 15:08 [PATCH RFC 00/49] xen: add core scheduling support Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 01/49] xen/sched: call cpu_disable_scheduler() via cpu notifier Juergen Gross
2019-04-01 9:21 ` Julien Grall
2019-04-01 9:40 ` Juergen Gross
2019-04-01 10:29 ` Julien Grall
2019-04-01 10:37 ` Juergen Gross
2019-04-01 13:21 ` Julien Grall
2019-04-01 13:33 ` Juergen Gross
2019-04-01 14:01 ` Julien Grall
2019-04-01 14:23 ` Juergen Gross
2019-04-01 15:15 ` Julien Grall
2019-04-01 16:00 ` Juergen Gross
2019-04-01 17:17 ` Julien Grall
2019-04-16 19:34 ` Stefano Stabellini
2019-04-16 19:34 ` [Xen-devel] " Stefano Stabellini
2019-03-29 15:08 ` [PATCH RFC 02/49] xen: add helper for calling notifier_call_chain() to common/cpu.c Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 03/49] xen: add new cpu notifier action CPU_RESUME_FAILED Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 04/49] xen: don't free percpu areas during suspend Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 05/49] xen/cpupool: simplify suspend/resume handling Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 06/49] xen/sched: don't disable scheduler on cpus during suspend Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 07/49] xen/sched: fix credit2 smt idle handling Juergen Gross
2019-03-29 18:22 ` Dario Faggioli
2019-03-29 15:08 ` [PATCH RFC 08/49] xen/sched: use new sched_item instead of vcpu in scheduler interfaces Juergen Gross
2019-03-29 18:42 ` Andrew Cooper
2019-03-30 10:24 ` Juergen Gross
2019-04-01 6:06 ` Juergen Gross
2019-04-01 7:05 ` Dario Faggioli
2019-04-01 8:19 ` Andrew Cooper
2019-04-01 8:49 ` Juergen Gross
2019-04-01 15:15 ` Dario Faggioli
2019-03-29 15:08 ` [PATCH RFC 09/49] xen/sched: alloc struct sched_item for each vcpu Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 10/49] xen/sched: move per-vcpu scheduler private data pointer to sched_item Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 11/49] xen/sched: build a linked list of struct sched_item Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 12/49] xen/sched: introduce struct sched_resource Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 13/49] xen/sched: let pick_cpu return a scheduler resource Juergen Gross
2019-03-29 15:08 ` [PATCH RFC 14/49] xen/sched: switch schedule_data.curr to point at sched_item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 15/49] xen/sched: move per cpu scheduler private data into struct sched_resource Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 16/49] xen/sched: switch vcpu_schedule_lock to item_schedule_lock Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 17/49] xen/sched: move some per-vcpu items to struct sched_item Juergen Gross
2019-03-29 21:33 ` Andrew Cooper
2019-03-30 9:59 ` Juergen Gross
2019-04-01 5:59 ` Juergen Gross
2019-04-01 8:05 ` Jan Beulich
2019-04-01 8:26 ` Andrew Cooper
2019-04-01 8:41 ` Jan Beulich
2019-04-01 8:45 ` Juergen Gross
2019-04-01 8:01 ` Jan Beulich
2019-04-01 8:33 ` Andrew Cooper
2019-04-01 8:44 ` Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 18/49] xen/sched: add scheduler helpers hiding vcpu Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 19/49] xen/sched: add domain pointer to struct sched_item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 20/49] xen/sched: add id " Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 21/49] xen/sched: rename scheduler related perf counters Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 22/49] xen/sched: switch struct task_slice from vcpu to sched_item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 23/49] xen/sched: move is_running indicator to struct sched_item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 24/49] xen/sched: make null scheduler vcpu agnostic Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 25/49] xen/sched: make rt " Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 26/49] xen/sched: make credit " Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 27/49] xen/sched: make credit2 " Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 28/49] xen/sched: make arinc653 " Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 29/49] xen: add sched_item_pause_nosync() and sched_item_unpause() Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 30/49] xen: let vcpu_create() select processor Juergen Gross
2019-03-29 19:17 ` Andrew Cooper
2019-03-30 10:23 ` Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 31/49] xen/sched: use sched_resource cpu instead smp_processor_id in schedulers Juergen Gross
2019-03-29 19:36 ` Andrew Cooper
2019-03-30 10:22 ` Juergen Gross
2019-04-01 8:10 ` Jan Beulich
2019-03-29 15:09 ` [PATCH RFC 32/49] xen/sched: switch schedule() from vcpus to sched_items Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 33/49] xen/sched: switch sched_move_irqs() to take sched_item as parameter Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 34/49] xen: switch from for_each_vcpu() to for_each_sched_item() Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 35/49] xen/sched: add runstate counters to struct sched_item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 36/49] xen/sched: rework and rename vcpu_force_reschedule() Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 37/49] xen/sched: Change vcpu_migrate_*() to operate on schedule item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 38/49] xen/sched: move struct task_slice into struct sched_item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 39/49] xen/sched: add code to sync scheduling of all vcpus of a sched item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 40/49] xen/sched: add support for multiple vcpus per sched item where missing Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 41/49] x86: make loading of GDT at context switch more modular Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 42/49] xen/sched: add support for guest vcpu idle Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 43/49] xen/sched: modify cpupool_domain_cpumask() to be an item mask Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 44/49] xen: round up max vcpus to scheduling granularity Juergen Gross
2019-04-01 8:50 ` Andrew Cooper
2019-04-01 9:47 ` Juergen Gross
2019-04-02 7:49 ` Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 45/49] xen/sched: support allocating multiple vcpus into one sched item Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 46/49] xen/sched: add a scheduler_percpu_init() function Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 47/49] xen/sched: support core scheduling in continue_running() Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 48/49] xen/sched: make vcpu_wake() core scheduling aware Juergen Gross
2019-03-29 15:09 ` [PATCH RFC 49/49] xen/sched: add scheduling granularity enum Juergen Gross
2019-03-29 15:37 ` [PATCH RFC 00/49] xen: add core scheduling support Juergen Gross
2019-03-29 15:39 ` Jan Beulich
[not found] ` <5C9E3C3D0200007800222FB0@suse.com>
2019-03-29 15:46 ` Juergen Gross
2019-03-29 16:56 ` Dario Faggioli
2019-03-29 17:00 ` Juergen Gross
2019-03-29 17:29 ` Dario Faggioli
2019-03-29 17:39 ` Rian Quinn
2019-03-29 17:48 ` Andrew Cooper
2019-03-29 18:35 ` Rian Quinn
2019-03-29 18:16 ` Dario Faggioli
2019-03-30 9:55 ` Juergen Gross
2019-04-11 0:34 ` Dario Faggioli
2019-04-11 0:34 ` [Xen-devel] " Dario Faggioli
2019-04-11 7:16 ` Juergen Gross
2019-04-11 7:16 ` [Xen-devel] " Juergen Gross
2019-04-11 13:28 ` Dario Faggioli
2019-04-11 13:28 ` [Xen-devel] " Dario Faggioli
2019-04-01 6:41 ` Jan Beulich
[not found] ` <5CA1B285020000780022361D@suse.com>
2019-04-01 6:49 ` Juergen Gross
2019-04-01 7:10 ` Dario Faggioli
2019-04-01 7:15 ` Juergen Gross
2019-04-01 7:13 ` Jan Beulich [this message]
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