From: riel@surriel.com (Rik van Riel)
To: kernelnewbies@lists.kernelnewbies.org
Subject: How to understand "processor" in "SMP" and "UP"?
Date: Mon, 20 Jul 2015 17:04:15 -0400 [thread overview]
Message-ID: <55AD624F.808@surriel.com> (raw)
In-Reply-To: <CA+MhoaMS9bez2R0+owdmg5Tfy+58yandsjZQsF03gnriDc2m5A@mail.gmail.com>
On 07/19/2015 11:43 PM, Nan Xiao wrote:
> Hi all,
>
> Per my understanding, the "processor" in "SMP" and "UP" should be a
> "logic CPU", not a "physical CPU".
> If the "physical CPU" contains 2 "cores", and every "core" contains 2
> "hardware threads", then the "processor"
> should stands for "hardware thread".
>
> Is my understanding right? Thanks very much in advance!
Yes, you are absolutely right, when speaking from a
software point of view.
Each logical processor shows up as a CPU in Linux.
Of course, if you were to talk to somebody installing
physical CPUs in systems, you would get a different
answer :)
--
All rights reversed.
next prev parent reply other threads:[~2015-07-20 21:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-20 3:43 How to understand "processor" in "SMP" and "UP"? Nan Xiao
2015-07-20 21:04 ` Rik van Riel [this message]
2015-07-21 1:56 ` Nan Xiao
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