* How to understand "processor" in "SMP" and "UP"?
@ 2015-07-20 3:43 Nan Xiao
2015-07-20 21:04 ` Rik van Riel
0 siblings, 1 reply; 3+ messages in thread
From: Nan Xiao @ 2015-07-20 3:43 UTC (permalink / raw)
To: kernelnewbies
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!
Best Regards
Nan Xiao
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* How to understand "processor" in "SMP" and "UP"?
2015-07-20 3:43 How to understand "processor" in "SMP" and "UP"? Nan Xiao
@ 2015-07-20 21:04 ` Rik van Riel
2015-07-21 1:56 ` Nan Xiao
0 siblings, 1 reply; 3+ messages in thread
From: Rik van Riel @ 2015-07-20 21:04 UTC (permalink / raw)
To: kernelnewbies
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.
^ permalink raw reply [flat|nested] 3+ messages in thread
* How to understand "processor" in "SMP" and "UP"?
2015-07-20 21:04 ` Rik van Riel
@ 2015-07-21 1:56 ` Nan Xiao
0 siblings, 0 replies; 3+ messages in thread
From: Nan Xiao @ 2015-07-21 1:56 UTC (permalink / raw)
To: kernelnewbies
Hi Rik,
Thanks very much for your comments!
Best Regards
Nan Xiao
On Tue, Jul 21, 2015 at 5:04 AM, Rik van Riel <riel@surriel.com> wrote:
> 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.
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
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2015-07-20 3:43 How to understand "processor" in "SMP" and "UP"? Nan Xiao
2015-07-20 21:04 ` Rik van Riel
2015-07-21 1:56 ` Nan Xiao
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