[Paraview] Surface LIC memory usage

[Burlen Loring]

Hi Utkarsh,

The issues may be due to my misuse of your design :). I have had 
immediate mode disabled for quite some time as it had greatly improved 
performance. however this seams to be a major factor in the huge memory 
bloat when using LIC rep.

When I enabled immediate mode, memory usage peaks around 3GB, which 
still seams a bit high, but much more reasonable than 18GB. And the 
growth in memory usage is much smaller, if at all (it's been harder to 
examine many steps because of the performance issue).

The performance is so reduced in immediate mode that it's nearly 
impossible to use (5+ minute for each render).

I haven't had any success running the LIC parallel, artefacts appear at 
process boundaries. I had tried running D3 on the reader which doesn't 
generate ghost layer requests yet, but this was unsuccessful.

Can the LIC work in parallel?

On 06/07/2011 05:53 AM, Utkarsh Ayachit wrote:
> I doubt it's part of the design so to speak :). My suspicion is some
> OpenGL buffers are not being released or something of that nature.
> I'll try to track it down.
>
> Utkarsh
>
> On Mon, Jun 6, 2011 at 9:28 PM, Burlen Loring<bloring at lbl.gov>  wrote:
>> Hi,
>>
>> I am seeing some pretty astounding memory usage when using the LIC. My
>> dataset is 100MB image 2D image data. When I load it and display using a
>> slice rep. I use about 800MB of RAM, but when I turn on LIC rep. memory
>> usage goes up to 18GB!! What's worse is that as I advance through the time
>> series with each new step the memory usage grows by 4GB or more, until I run
>> out of RAM. I put the output from one run below, memory usage is reported in
>> KB.
>>
>> Does anyone know why LIC rep. requires such a massive amount of RAM? I
>> didn't see any outright large leaks, so it must be part of this rep. design?
>> And can anything be done to prevent the growth in its usage over time?
>>
>> Listen on port: 11111
>> Waiting for client...
>> Waiting for server...
>> Client connected.
>> [0] vtkSQBOVReader::SetFileName 0.024441
>> [0] vtkSQBOVReader::RequestData 0.571345
>> 1 775272<------------------ memory use w/ surface rep.
>> 1 775272
>> 0 missmarple 15193
>> 1 776856
>> 1 776856
>> 1 779336
>> 1 18480044<------------------ memory use w/ LIC rep.
>> [0] vtkSQBOVReader::RequestData 3.05736
>> 1 18792084
>> [0] vtkSQBOVReader::RequestData 3.1486
>> 1 19603868
>> [0] vtkSQBOVReader::SetFileName 2.09808e-05
>> Client connection closed.
>>
>>
>>
>> Burlen
>>
>>
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