linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Ley Foon Tan <lftan.linux@gmail.com>
To: Vincent Guittot <vincent.guittot@linaro.org>,
	Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Quentin Perret <quentin.perret@arm.com>,
	Greg KH <gregkh@linuxfoundation.org>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: linux-kernel@vger.kernel.org
Subject: sched: Question about big and little cores system with SMP and EAS
Date: Wed, 16 Jun 2021 19:29:26 +0800	[thread overview]
Message-ID: <CAFiDJ5-ZO=BuSwBPPPecZhLyjyipTLenQxgCK=t52Pj7r659sQ@mail.gmail.com> (raw)

Hi all

Would like to ask the experts here regarding the Symmetric
Multi-Processing mode (SMP) with Energy aware scheduler (EAS) support
on the big + little cores system.

Hardware system:
Big and little cores have almost the same ISA, but the big core has
some extension instructions that little core doesn't have.

With this hardware system, is it still possible to use SMP with EAS?
Any suggestions supporting this kind of hardware system in Linux?

Thanks in advance.

Regards
Ley Foon

             reply	other threads:[~2021-06-16 11:29 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-16 11:29 Ley Foon Tan [this message]
2021-06-16 11:39 ` sched: Question about big and little cores system with SMP and EAS Peter Zijlstra
2021-06-16 13:20   ` Dietmar Eggemann
2021-06-17  5:00     ` Ley Foon Tan
2021-06-17  7:51       ` Morten Rasmussen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAFiDJ5-ZO=BuSwBPPPecZhLyjyipTLenQxgCK=t52Pj7r659sQ@mail.gmail.com' \
    --to=lftan.linux@gmail.com \
    --cc=dietmar.eggemann@arm.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=peterz@infradead.org \
    --cc=quentin.perret@arm.com \
    --cc=vincent.guittot@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).