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<p class="MsoPlainText">Takuya<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Running a test of coprocessing on a very small simulation using just 2 cores on the desktop, I am seeing what looks like a very small leak. Over about 30 iterations, it’s of the order of 30MB, so might not be real (need to test on a
bigger domain to see if it grows faster), but the trend looks credible. I’ll see if I can pinpoint where the loss is occurring.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">JB<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><span style="mso-fareast-language:EN-GB"><img width="1726" height="155" id="Picture_x0020_1" src="cid:image001.png@01CCCFAF.985F7180"></span><o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><span lang="EN-US" style="mso-fareast-language:EN-GB">-----Original Message-----<br>
From: paraview-bounces@paraview.org [mailto:paraview-bounces@paraview.org] On Behalf Of Takuya OSHIMA<br>
Sent: 10 January 2012 15:11<br>
To: paraview@paraview.org<br>
Subject: Re: [Paraview] Unreclaimed memory in coprocessing? (PV 3.12.0 and git-master)</span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Attached in the previous mail is a sample Python coprocessing script that exhibits the problem (written by the coprocessing script generator of git-master as of today).<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Takuya<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Takuya OSHIMA, Ph.D.<o:p></o:p></p>
<p class="MsoPlainText">Faculty of Engineering, Niigata University<o:p></o:p></p>
<p class="MsoPlainText">8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">From: Takuya OSHIMA <<a href="mailto:oshima@eng.niigata-u.ac.jp"><span style="color:windowtext;text-decoration:none">oshima@eng.niigata-u.ac.jp</span></a>><o:p></o:p></p>
<p class="MsoPlainText">Subject: Unreclaimed memory in coprocessing? (PV 3.12.0 and git-master)<o:p></o:p></p>
<p class="MsoPlainText">Date: Tue, 10 Jan 2012 23:08:21 +0900 (JST)<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">> Hi,<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> I am having a problem where the memory usage of my simulation program
<o:p></o:p></p>
<p class="MsoPlainText">> which links with the PV coprocessing library grows until it gets
<o:p></o:p></p>
<p class="MsoPlainText">> killed by the operating system.<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> I have the following piece of code for triggering coprocessing and if
<o:p></o:p></p>
<p class="MsoPlainText">> I watch the memory usage with the ps/top commands it grows only at the
<o:p></o:p></p>
<p class="MsoPlainText">> timestep where this->Processor->CoProcess() is called. My simulation
<o:p></o:p></p>
<p class="MsoPlainText">> program uses vtkImageData as underlying data structure so no data
<o:p></o:p></p>
<p class="MsoPlainText">> format adaptation (that may involve allocating extra memory for data<o:p></o:p></p>
<p class="MsoPlainText">> copy) is performed.<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> this->DataDescription->SetTimeData(this->TimeInfo->GetTimeValue(),<o:p></o:p></p>
<p class="MsoPlainText">> this->TimeInfo->GetTIter());<o:p></o:p></p>
<p class="MsoPlainText">> if (this->Processor->RequestDataDescription(this->DataDescription))<o:p></o:p></p>
<p class="MsoPlainText">> {<o:p></o:p></p>
<p class="MsoPlainText">> vtkCPInputDataDescription *idd<o:p></o:p></p>
<p class="MsoPlainText">> = this->DataDescription->GetInputDescriptionByName("input");<o:p></o:p></p>
<p class="MsoPlainText">> // obtain vtkImageData to coprocess from my simulation program<o:p></o:p></p>
<p class="MsoPlainText">> vtkImageData *grid = this->TimeInfo->GetGrid();<o:p></o:p></p>
<p class="MsoPlainText">> idd->SetWholeExtent(grid->GetWholeExtent());<o:p></o:p></p>
<p class="MsoPlainText">> idd->SetGrid(grid);<o:p></o:p></p>
<p class="MsoPlainText">> // now call the coprocessing library<o:p></o:p></p>
<p class="MsoPlainText">> this->Processor->CoProcess(this->DataDescription);<o:p></o:p></p>
<p class="MsoPlainText">> }<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> Besides, the Apple's "leaks" tool shows no meaningful leaks which
<o:p></o:p></p>
<p class="MsoPlainText">> makes me wonder if e.g. there are un-unregistered proxies than simply
<o:p></o:p></p>
<p class="MsoPlainText">> unmatched New()/Delete() or new/delete pairs.<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> The problem is same for PV 3.12.0 and the git master as of today.<o:p></o:p></p>
<p class="MsoPlainText">> Is anybody else having the problem? Any ideas?<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> Thanks,<o:p></o:p></p>
<p class="MsoPlainText">> Takuya<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> Takuya OSHIMA, Ph.D.<o:p></o:p></p>
<p class="MsoPlainText">> Faculty of Engineering, Niigata University<o:p></o:p></p>
<p class="MsoPlainText">> 8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN<o:p></o:p></p>
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