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kingoreo August 30, 2013 09:16

Can I use all Cores simulating with AVL?
Hi everyone,

I just wondered, if it is possible to use all the cores of my computer, so that the simulation would proceed faster. If it is possible, could somebody tell me, if I can adjust these new settings directly in AVL or do I have to do this with the Windows-Settings-window

Best regards


kimmhw September 1, 2013 21:22


How many cores do you have?
And you need to describe FIRE version and OS information.

Normally, MPI should speed up the calculation.
And HP-MPI library will be installed during FIRE installation.

When you click the "start calculation", "Job Setup" window will be popped up.
You can select "MPI" as simulation mode and define # of CPUs.

Very straightforward... Just try.

amin_u50 September 8, 2013 13:23

my sys is core i5...
How many CPUs can I use for fast running?
what host name is?

kimmhw September 9, 2013 02:42

I don't know how many cores do you have in your system.
It depends on number of CPU cores.

amin_u50 September 9, 2013 03:54

Hi kimwh...
my sys has 4 core...
what do you recommend for this CPUs?

kimmhw September 9, 2013 04:58

In general, the use of detail chemistry results in long calculation time.
You can use all of cores for calculation.

And if you are using v2013, the option "clustering" or "multi-zone" for general gas phase reaction can be applied to reduce the calculation time.

amin_u50 September 9, 2013 07:30

Hi kimmhw
when i use more than one CPUs in job setup I face this error:
mpirun: gethostbyname(amin) failed
mpirun: Line 1: Invalid hostname: amin

I don't know what I enter in the HOST name...
what should I do?


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