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Old   February 21, 2008, 10:34
Default making both cores work
  #1
anup
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i hv pentium D 2.8Ghz .how can i make both of my cores work simultaneouly .. apending -t2 in the shortcut did give me a feel that something is goin to happen ..but alas!! the CPU utilization showed only one core working at full capacity ... plz help me ..how to do it
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Old   February 21, 2008, 22:21
Default Re: making both cores work
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rodrigo
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you have to disconnect the dual core function in your computer BIOS. At least it did function with an Hyper Threading Pentium processor.
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Old   February 22, 2008, 07:39
Default Re: making both cores work
  #3
Paolo Lampitella
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I have a quad core q6600 and Windows vista. when i want to use the parallel version of Fluent i just go in the start menu, run... and digit:

C:\Fluent.Inc\ntbin\ntx86\fluent 3ddp -t2

where the last digit (2) means 2 processes. If i want to use 3 cores i digit:

C:\Fluent.Inc\ntbin\ntx86\fluent 3ddp -t3

and so on.

You can also go in the dos prompt and under the directory:

C:\Fluent.Inc\ntbin\ntx86

digit:

fluent 3ddp -t3

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Old   February 22, 2008, 08:55
Default Re: making both cores work
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anup
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i did that but that should mean that when i look through the task manager it should show both the cores working at 100% usage ..does it show in ur case?
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Old   February 22, 2008, 09:27
Default Re: making both cores work
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anup
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Host spawning Node 0 on machine "personal-b35842" (ntx86).

You can click CTRL+C to stop the startup process!

------------------------------------------------------------------------------ ID Comm. Hostname O.S. PID Mach ID HW ID Name ------------------------------------------------------------------------------ host net personal-b35842 Windows-32 4024 0 1508 Fluent Host n1 mpich2 personal-b35842 Windows-32 4080 0 1 Fluent Node n0* mpich2 personal-b35842 Windows-32 1888 0 0 Fluent Node

------------------------------------------------------------------------------

i got this message .. yippe i guess its working now ... but is there a software/test to check the cpu time req to perform a specific task
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Old   February 22, 2008, 09:30
Default Re: making both cores work
  #6
anup
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i hv a doubt though even even no calcuations/iterations are done ..the cpu usage by fluent is 50% y is that so
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Old   February 22, 2008, 13:02
Default Re: making both cores work
  #7
Paolo Lampitella
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I have not yet used it so much because i'm working on a 2D problem. But in the little test i've done i launched 3 processes and 3 cores were at about 95 - 100 %, the fourth core was at 50 %, maybe because it was the host.

However in my case Fluent displayed the same thing you posted
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Old   February 22, 2008, 13:06
Default Re: making both cores work
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anup
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thanks .. btw what do u do ? may i know more about u
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Old   February 22, 2008, 13:19
Default Re: making both cores work
  #9
Paolo Lampitella
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You're welcome

I'm a graduate student in italy and i'm going to work on Synthetic Jets in straight channel with LES.

But, before to perform such a simulation, i'm testing the Fluent space and time discretization schemes with the Taylor solution in 2d.

Maybe, i'll have time to perform some straight channel LES simulations on the intel quadcore so i could go deep in multicore and say more about the performance of Fluent in this case.
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Old   February 22, 2008, 13:21
Default Re: making both cores work
  #10
anup
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dude ..that was all latin to me ... i m a final year chemical engg undergraduate at the Indian institute of technology,kharagpur .. guess u hv heard about it ...
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Old   February 22, 2008, 13:25
Default Re: making both cores work
  #11
anup
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last year i went to italy while i was in netherlands for my summer internship .. its much like india .. and a lot differnt than rest of the europe
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Old   February 23, 2008, 05:27
Default Re: making both cores work
  #12
Paolo Lampitella
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Yes, italy is a lot different of the rest of Europe...in the worst sense possible. Actually italy it's going down so rapidly that everyone i know wants to go in other country to live. I'm also in a special situation, living in Campania which is now becomed a 4th world country because of the trash in every street and around every corner.

Well...let's leave this space to CFD stuff.

Bye
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Old   February 26, 2008, 05:00
Default Re: making both cores work
  #13
MS
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Whom are you working under? Rof. S.Chakraborty or Prof. SK Dash?
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Old   February 26, 2008, 05:04
Default Re: making both cores work
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anup
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m working under prof G Das and Samantah ray .. btw who r u ?
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Old   February 27, 2008, 03:53
Default Re: making both cores work
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MS
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Sorry dude got ... got mixed up .. thought that u were from mechanical engineering...

I am a 2004 passout from Mech.
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Old   February 27, 2008, 07:57
Default Re: making both cores work
  #16
anup
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well i m goin to pass in 2008.... m in iit kgp... whr r u now?
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Old   February 28, 2008, 10:04
Default Re: making both cores work
  #17
MS
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I am a CFD analyst in an Automotive company.
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