[Pw_forum] serial run when parallel intended

[Omololu Akin-Ojo]

Thank you for your response, Stefano. I appreciate it.

o.

On Mon, Apr 11, 2011 at 10:17 AM, Stefano de Gironcoli
<degironc at sissa.it> wrote:
> because the code estimate that the communication overhead would exceed
> the gain due to the distribution of the operation across the processors.
> This apply to the subspace diagonalization, the rest of the run is parallel
>
> stefano
>
> On 04/11/2011 08:52 AM, Omololu Akin-Ojo wrote:
>> Hi,
>>
>> I was aiming to run QE in parallel but I see the following message in
>> my output file; what am i doing wrong?
>>
>>       Subspace diagonalization in iterative solution of the eigenvalue problem:
>>       a serial algorithm will be used
>>
>> Why is QE using a serial algorithm? I am using openmpi and QE
>> recognizes the number of processors correctly:
>>       Parallel version (MPI), running on     8 processors
>>       R&  G space division:  proc/pool =    8
>>
>> I could give more info if needed.
>>
>> Thanks in advance for any help.
>>
>> o.
>>
>> Postdoctoral fellow,
>> CMSP section,
>> ICTP, Italy.
>>
>>
>>
>
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