Intel® Fortran Compiler
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Intel Fortran Compiler uses multiple processors automatically?

schuerg
Beginner
‎07-30-2009 05:15 AM
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Hello,

I have a single-threaded application written in Fortran. I am compiling it in Visual Studio with Intel Fortran Compiler 11.0 on Windows with optimization disabled (/Od) and no parallization. I want to work in parallelization later. I have a notebook with an Intel core 2 Duo P9500 processor. After compiling the program I expected the program to run on one of the processors. When examining the Task Manager during execution though, I see that both processors are being used to 100 %. I do not unterstand why. What am I missing? Any help would be appreciated.

Greetings,
Marco
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Andrew_Smith
Valued Contributor I
‎07-30-2009 05:57 AM
422 Views
Quoting - schuerg
Hello,

I have a single-threaded application written in Fortran. I am compiling it in Visual Studio with Intel Fortran Compiler 11.0 on Windows with optimization disabled (/Od) and no parallization. I want to work in parallelization later. I have a notebook with an Intel core 2 Duo P9500 processor. After compiling the program I expected the program to run on one of the processors. When examining the Task Manager during execution though, I see that both processors are being used to 100 %. I do not unterstand why. What am I missing? Any help would be appreciated.

Greetings,
Marco

I dont think this should happen unless you make extensive calls to an external library such as MKL which is parallel by default.
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