[Paraview] distributed stream tracer scalability issue

[Zhanping Liu]

Burlen:

   The choice of RK-45 might not be able to make a big difference for your
case if the bottleneck lies in other components of the whole pipeline.

   -Zhanping

On Tue, Aug 25, 2009 at 2:42 PM, burlen <burlen.loring at gmail.com> wrote:

> Hi Zp,
>
> Thanks for the hint, I hadn't expected that, and was using rk4.
>
> Burlen
>
> Zhanping Liu wrote:
>
>> Hi Burlen:
>>      Have you tried the RK-45 integrator? It uses an adaptive step size
>> and hence in many cases makes streamline integration faster than the other
>> two modes (RK-2 and RK-4)? I agree with John in that the low performance
>> exhibited to us might be caused by 'other' (data-depenent) components than
>> the inherent integration part itself, e.g., point location and cell location
>> in an unstructured grid (which are cetainly also related to streamline
>> integration).
>>      Thanks.
>>      -Zhanping
>>
>> On Mon, Aug 24, 2009 at 7:58 PM, burlen <burlen.loring at gmail.com <mailto:
>> burlen.loring at gmail.com>> wrote:
>>
>>    We've been using the distributed stream tracer to generate
>>    100s-1000s of stream lines per time step. It's very slow, and it
>>    doesn't scale at all.  The class comments say as much. I'm sure
>>    there is a reason why this implementation was chosen. Is there
>>    something that generally prevents real parallel implementation? Is
>>    there a better implementation available out there?
>>
>>    There is this post a while back
>>    http://www.paraview.org/pipermail/paraview/2009-July/012959.html
>>
>>    What's the status?
>>
>>    Thanks
>>    Burlen
>>
>>
>>
>>
>>
>>
>>
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>>
>>
>> --
>> Zhanping Liu, PhD
>> Kitware, Inc.
>> 28 Corporate Drive
>> Clifton Park, NY 12065-8662
>> Phone: 518-371-3971 x 138
>> http://www.zhanpingliu.org
>>
>
>


-- 
Zhanping Liu, PhD
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x 138
http://www.zhanpingliu.org
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