Pete,
I saw it. I am just busy :-) I will try to take another look later.
Best,
Bruno
2016-07-27 9:37 GMT-04:00 Pete Griffin <griffin.pet...@gmail.com>:
> Bruno, I posted a reply to your comment. but not within your comment but at
> top of page. If you did not receive an indication of reply check the
> original thread.
>
> Pete Griffin
>
> On Monday, July 25, 2016 at 2:31:09 PM UTC-4, Bruno Turcksin wrote:
>>
>> Pete,
>>
>> you need to make sure that the codes do exactly the same thing. I haven't
>> compared the codes too much but they use different preconditioners. This
>> will impact how much memory you will use.
>>
>> Best,
>>
>> Bruno
>>
>>
>> On Monday, July 25, 2016 at 1:59:53 PM UTC-4, Pete Griffin wrote:
>>>
>>> I found that running step-8 and step-17 on a single processor Intel®
>>> Core™ i7-3630QM CPU @ 2.40GHz × 8 used substantially more Peak resident
>>> memory (> 5x) than I thought it would. This surprised me since I thought
>>> from reading step-17 that the memory increase was on the order of the
>>> solution vector which should have been << 2x greater. I verified some of the
>>> larger memory usage numbers using top.
>>>
>>> Is my assumption correct that 5x Peak resident memory is more than it
>>> should be?
>>>
>>> The results of other simulations with a beam with body-force load and
>>> with traction loads with and without HP and with and without MPI/PETSc all
>>> show the same results and they agree with beam theory.
>>>
>>> The output of the modified step-8.cc and step-17.cc are attached along
>>> with a plot of peak virtual memory and peak resident memory
>>> vs. DOF. The changes between the original distributed step-8 and step-17,
>>> with comments and extra newlines excluded (modified file >), are as below:
>>>
>>> Thanks beforehand
>>>
>>> Pete Griffin
>>>
>>>
>>> ======================================================================================
>>> diff ~/Documents/Zipstore2/dealii-8.4.1-PETSc/examples/step-8/step-8.cc
>>> step-8.cc
>>> 56c47,48
>>> < // This again is C++:
>>> ---
>>> > #include <deal.II/base/utilities.h>
>>>
>>> 767a394,402
>>> >
>>> > Utilities::System::MemoryStats stats;
>>> > Utilities::System::get_memory_stats(stats);
>>> > std::stringstream Str;
>>> >
>>> > Str.str("");
>>> > Str << " Peak virtual memory: " << stats.VmSize/1024 << " MB,
>>> > Peak resident memory: "
>>> > << stats.VmRSS/1024 << " MB" << std::endl;
>>> > std::cout << Str.str();
>>>
>>> 781c411
>>> < Step8::ElasticProblem<2> elastic_problem_2d;
>>> ---
>>> > Step8::ElasticProblem<3> elastic_problem_2d;
>>>
>>>
>>> ======================================================================================
>>> diff ~/Documents/Zipstore2/dealii-8.4.1-PETSc/examples/step-17/step-17.cc
>>> ../step-17/step-17.cc
>>> 84a50
>>> > #include <deal.II/base/utilities.h>
>>> 1015c355
>>> < for (unsigned int cycle=0; cycle<10; ++cycle)
>>> ---
>>> > for (unsigned int cycle=0; cycle<8; ++cycle)
>>> 1018d357
>>> <
>>> 1022c361
>>> < triangulation.refine_global (3);
>>> ---
>>> > triangulation.refine_global (2);
>>> 1049a383,391
>>> >
>>> > Utilities::System::MemoryStats stats;
>>> > Utilities::System::get_memory_stats(stats);
>>> > std::stringstream Str;
>>> >
>>> > Str.str("");
>>> > Str << " Peak virtual memory: " << stats.VmSize/1024 << " MB,
>>> > Peak resident memory: "
>>> > << stats.VmRSS/1024 << " MB" << std::endl;
>>> > std::cout << Str.str();
>>> 1073,1074c403
>>> <
>>> < ElasticProblem<2> elastic_problem;
>>> ---
>>> > ElasticProblem<3> elastic_problem;
>>>
>>>
>>> =============================================================================================
>>>
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