Charm++ parallel programming system

["Celso L. Mendes" <cmendes AT illinois.edu>]

The "+p" parameter indicates the number of physical (i.e. real)
processors where the program will be running.

There is another parameter, "+vp", which indicates the number
of virtual processors. Thus, you can run, say, with "+p 8 +vp 128"
where each physical processor will be in charge of 16 virtual
processors.

BigSim explores this capability to simulate future machines.
Each virtual processor assumes the role of a target processor
of the future machine. In the example above, you would be using
a current machine with 8 existing processors to simulate a future
machine with 128 processors.

-Celso


On 1/10/2012 11:30 AM, Balaji S wrote:
> Hi ,
>
> I am new to charm++. I have read that bigsim is used to simulate more number 
> of processors,
> When in charm++, u can specify the option (as a commandline argument ) +p8 or 
> +p32 to indicate
> number of processors, what is need for a separate simulator like bigsim?
>
> --
> With Regards,
> Balaji.S
>
>
>
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