Re: [Anuga-user] ANUGA

[Stephen R. <ste...@an...>]

Hi Rupal,

Yes I agree with Ole, when running with mpirun, choose np to be the number of cores.

Cheers
Steve


==============================
Stephen Roberts
Undergraduate Convenor
Mathematical Sciences Institute
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________________________________
From: Ole Nielsen <ole...@gm...>
Sent: Friday, 8 February 2019 7:05 AM
To: rupal budhbhatti
Cc: anu...@li...
Subject: Re: ANUGA

I'd go with cores. Threads only give speed up when some processes are waiting for IO.
In parallel computing we want every core to run at full speed and as independent as possible.

It'll still run but don't expect additional speed up.

In your case use 18 as the number of processors

Cheers
Ole

On Thu., 7 Feb. 2019, 22:40 rupal budhbhatti <rup...@gm...<mailto:rup...@gm...> wrote:
Hello,

Sir, In parallel computing ANUGA uses numbers of threads or cores?
My system has 18 cores and 36 threads. By mistake I gave 64 as number of processors for parallel.Still it is running. So does it means that I can give 18*2*2 = 72?

I am not from computing background. Please help me to understand this.



Kind Regards,
Rupal