Boosting CPU usage

earlybird · November 2, 2012, 09:58

Hello,
I use ANSYS/Fluent v.13 to do a 3-D simulation. I can use Parallel (local machine) and my CPU is a i7 2600 3.4 CHz with 16 GB of RAM.
when I chose parallel option in Fluent Launcher and set to 4 cores (I guess it is the maximum that I can go with since i7 2600 has 4 cores) then I see that during the simulation the maximum CPU usage does not pass 50%!!
does anybody know how to boos the CPU usage to reach to 100% usage?

Many thanks

RodriguezFatz · November 2, 2012, 10:25

Don't worry, everything is fine! Your CPU supports something called "hyper threading", where every physical core fakes a second one to optimize cpu usage. Thus, windows thinks you have 8 cores. When you use 4 of them, Windows shows a CPU usage of 50%.
http://en.wikipedia.org/wiki/Hyper-threading

earlybird · November 2, 2012, 10:32

thank you for your rapid response

,
by this, it means that the CPU is actually working 100% not 50%, and yes you are write because I see 8 windows instead of 4 in CPU performance window!

November 2, 2012, 09:58	Boosting CPU usage	#1
earlybird New Member Join Date: Mar 2011 Posts: 13 Rep Power: 15	Hello, I use ANSYS/Fluent v.13 to do a 3-D simulation. I can use Parallel (local machine) and my CPU is a i7 2600 3.4 CHz with 16 GB of RAM. when I chose parallel option in Fluent Launcher and set to 4 cores (I guess it is the maximum that I can go with since i7 2600 has 4 cores) then I see that during the simulation the maximum CPU usage does not pass 50%!! does anybody know how to boos the CPU usage to reach to 100% usage? Many thanks

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November 2, 2012, 10:25		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	Don't worry, everything is fine! Your CPU supports something called "hyper threading", where every physical core fakes a second one to optimize cpu usage. Thus, windows thinks you have 8 cores. When you use 4 of them, Windows shows a CPU usage of 50%. http://en.wikipedia.org/wiki/Hyper-threading

November 2, 2012, 10:32		#3
earlybird New Member Join Date: Mar 2011 Posts: 13 Rep Power: 15	thank you for your rapid response , by this, it means that the CPU is actually working 100% not 50%, and yes you are write because I see 8 windows instead of 4 in CPU performance window!