Re: [Bug-apl] OpenMP performance: first result

[Juergen Sauermann]

Hi David,

I guess the circle functions and ⋆/⍟ might do a better job in raising 
your motivation!

If I remember correctly then in 1990 we got a speedup of 5-6 on our 32 
processor machine,
which means that the break-even point is at about 6 cores.

Unfortunately my own machine has only 2 cores.

/// Jürgen



On 03/12/2014 07:04 AM, David Lamkins wrote:
> WIth the OpenMP patch I put together last night, adding two 
> million-element vectors went from about 45ms without OpenMP to about 
> 32ms with OpenMP.
>
> That's evidence that OpenMP is doing *something*, even though the 
> speedup is nowhere near commensurate with the number of cores (8 on 
> this machine).
>
> I wasn't expecting much at this early stage. I am, however, encouraged 
> by the measurable result.
>
> --
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> Albert Einstein
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