[mpich-discuss] comparison of execution times:

[michael]

On Sun, 2010-05-23 at 16:31 +0530, sankar s wrote:
> Hi,
> 
> 
> I have done a simulation program in C, which contains 500
> Replications. In sequential code these 500 replications will be done
> one by one and the combined results will be posted in output at last.
> 
> 
> Same code I have written for MPI. first 250 replications in processor
> 0 and next 250 replications in processor 1. after completion of
> processor 0, it will send these results to processor 1. Processor 1
> combines all the results and gives the output.
> 
> 
> I expected, because of doing these parallelism, the execution time of
> MPI should be half or some what more than half than sequential code.
> 

you should also see if running the parallel code on 1 core is any
different to running the sequential code.

M

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