From: greg@kroah.com (Greg KH)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Power saving in case of CPU hotplugin
Date: Wed, 7 Sep 2016 13:13:36 +0200 [thread overview]
Message-ID: <20160907111336.GA10600@kroah.com> (raw)
In-Reply-To: <CAGrgb4USuXpFaRO0aLZuQ4o0MFjWBesktCSctn6PPWS9+cWM+A@mail.gmail.com>
On Wed, Sep 07, 2016 at 02:31:46PM +0530, Debdipta Ghosh wrote:
> HEllo all,
>
> I was going through a linux well known concept, hot plugin of cpu cores:
> https://www.kernel.org/doc/Documentation/cpu-hotplug.txt
>
> Is it more power saving than highest C-State and P-State?
>
> If we make one cpu offline, it disappears from the OS as it is not present, Is
> that means that CPU is powered off?
It all depends on your hardware. Some platforms can turn the CPUs off,
some can not.
Sorry, not much help, I know, but the variety of hardware out there in
the world is amazing...
greg k-h
prev parent reply other threads:[~2016-09-07 11:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-07 9:01 Power saving in case of CPU hotplugin Debdipta Ghosh
2016-09-07 11:13 ` Greg KH [this message]
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