Re: Illegal Instruction error ...

From: <draut2_at_uiuc.edu>
Date: Sun, 23 Sep 2007 14:58:34 -0500 (CDT)

Changing the flags in makefile didn't work and so I tried to recompile fftw in double precision. The compilation of fftw
in double precision needed some drfftw_mpi.h and I couldn't find this file suitable for my computer platform. Where can I find one compatible with my laptop? It's an i386 with ubuntu.
Anyways I compiled fftw with single precision and also Gadget with -NOTYPEPREFIX_FFTW. After this, the code seems to compile and run.
Thanks.


---- Original message ----
>Date: Fri, 21 Sep 2007 21:20:20 +0200
>From: Volker Springel <volker_at_MPA-Garching.MPG.DE>
>Subject: Re: [gadget-list] Illegal Instruction error ...
>To: Gadget General Discussion <gadget-list_at_MPA-Garching.MPG.DE>
>
>
>
>Hm, this looks like a problem when calling the FFTW library. Maybe you
>use the double precision version of the library but gadget thinks it
>calls the single precision one, or vice versa. Try to toggle the
>DOUBLEPRECISION_FFTW compile time switch, or see whether setting
>NOTYPEPREFIX_FFTW makes a difference.
>
>Volker
>
>dinesh wrote:
>> Hello I am getting following error after I compile and run Gadget.
>> ./Gadget lcdm_gas.param
>>
>> ..................................................
>> Begin Step 0, Time: 0.0909091, Redshift: 10, Systemstep: 0, Dloga: 0
>> domain decomposition...
>> NTopleaves= 64
>> work-load balance=1 memory-balance=1
>> domain decomposition done.
>> begin Peano-Hilbert order...
>> Peano-Hilbert done.
>> Start force computation...
>> Starting periodic PM calculation.
>>
>> Allocated 26.0742 MByte for FFT data.
>>
>> Illegal instruction
>>
>>
>> I am running it on my personal computer with only one processor.
>> I am confused as I don't understand the source of error.
>>
>> Thanks.
>> Dinesh
>>
>>
>>
>>
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>
>
>
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Received on 2007-09-23 21:58:41

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