Clever Geek Handbook

Running a Visual Studio console application in debug mode consumes no more than 50% CPU usage

I have several C # console applications that basically parse tons of in-memory data (LINQ) and output the results to a text file.

Now forget about writing to a text file for a minute, because that's not a problem.

When I run my application in debug mode, I never get it to use more than 50% of the cpu usage. It will parse / massize hundreds of thousands of entries, but go X fast and use 50% of AT MOST CPU (as viewed in task manager).

I would really like to use 100% CPU to speed up processing.

Does anyone have discernment?

I am running Windows XP Professional with Service Pack 3. I have Visual Studio 2008 Professional with Service Pack 1 (SP1).

Thank!

EDIT:

  • I manually set the proximity of a process in Task Manager to a single core on a dual processor.
  • Sometimes I can catch it using 51% or 52% of the CPU.
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5 answers


It looks like you have a dual core processor and your application is single threaded.



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It looks like you have a dual core processor. Adjusting processor affinity will do nothing to speed up your program. Also 51/52% you see are other processes running on another core at 1-2% PLUS, your program running on the first core at full speed.

If you want your program to use both cores, try looking at PLINQ in the parallel extension library.



Parallel Extensions Library

Plink's article

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If your application is running on only one thread and you have a dual-core processor, only one of the cores will be used, so you are using 50% of the available processor power.

If you have the ability to divide work into logical chunks and spawn threads associated with those chunks, you can use both cores.

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You have a dual core processor. There is only one thread in your application, which can only run on one core. It uses this core up to 100%. If you want to use a different kernel, you will have to use more threads.

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As others have said, your application runs on a single core of your dual (2) CPU. When you see 50% in the Task Manager, it means that the kernel that is running your application, which is half the processing power of your processor, is running at 100%.

Writing software to use multi-core processors is an art to yourself. See this article for a discussion. As @Alex Moore says, if you see 51% or 52%, it probably means the other core is doing something at the 1% -2% level.

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