LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Stewart Smith <stewart@linux.ibm.com>
To: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>,
	linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Cc: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>,
	npiggin@gmail.com, ego@linux.vnet.ibm.com
Subject: Re: [PATCH] cpuidle/powernv : init all present cpus for deep states
Date: Wed, 16 May 2018 10:22:22 -0500	[thread overview]
Message-ID: <87efiby6a9.fsf@linux.vnet.ibm.com> (raw)
In-Reply-To: <1526472134-23757-1-git-send-email-akshay.adiga@linux.vnet.ibm.com>

Akshay Adiga <akshay.adiga@linux.vnet.ibm.com> writes:
> Init all present cpus for deep states instead of "all possible" cpus.
> Init fails if the possible cpu is gaurded. Resulting in making only
> non-deep states available for cpuidle/hotplug.

Should this also head to stable? It means that for single threaded
workloads, if you guard out a CPU core you'll not get WoF, which means
that performance goes down when you wouldn't expect it to. Right?

-- 
Stewart Smith
OPAL Architect, IBM.

  reply	other threads:[~2018-05-16 15:22 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-16 12:02 [PATCH] cpuidle/powernv : init all present cpus for deep states Akshay Adiga
2018-05-16 15:22 ` Stewart Smith [this message]
2018-05-17  5:55   ` Akshay Adiga
2018-05-25 10:52     ` Michael Ellerman
2018-05-24  6:53 ` Akshay Adiga
2018-05-25 10:50 ` Michael Ellerman
2018-05-28  0:46   ` Stewart Smith
2018-06-01 15:54 ` Michael Ellerman

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=87efiby6a9.fsf@linux.vnet.ibm.com \
    --to=stewart@linux.ibm.com \
    --cc=akshay.adiga@linux.vnet.ibm.com \
    --cc=ego@linux.vnet.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=npiggin@gmail.com \
    /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).