View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000965 | OpenFOAM | Bug | public | 2013-08-16 15:58 | 2015-01-01 14:09 |
| Reporter | Assigned To | henry | |||
| Priority | normal | Severity | major | Reproducibility | always |
| Status | closed | Resolution | unable to reproduce | ||
| Platform | Intel x86-64 | OS | Red Hat Enterprise Linux Server | OS Version | 6.3 (Santiago) |
| Summary | 0000965: timeVaryingMappedFixedValue BC Very Slow on Many Cores | ||||
| Description | I ran a case using the timeVaryingMappedFixedValue on 320 cores, and it runs fine. I ran the same case with an inner region of refined grid such that I needed to run on 2560 cores, and the performance is very slow. I put timing write-outs in the solver code and have narrowed down the poor performance to updating of the timeVaryingMappedFixedValue boundary condition. I ran the same 2560 core case with OpenFOAM 2.0.x and the performance with timeVaryingMappedFixedValue is fine, so it seems that there is a change to that BC in 2.2.x that has poor performance on many cores. | ||||
| Steps To Reproduce | It would be very difficult for me to send you the test case since the inflow data is very large, and I'm not sure that you have 2560 cores to test this on. I'll do whatever I can to help you from my side, though. | ||||
| Tags | No tags attached. | ||||
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Is your case a moving/changing mesh case or is it static? How many points are on your inlet plane (i.e. number of points in constant/boundaryData) |
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Can you switch on debug flag for timeVaryingMappedFixedValue (in etc/controlDict) DebugSwitches { .. timeVaryingMappedFixedValue 1; .. } in both versions and e.g. re-run for a short time with time stamp output: mpirun --timestamp-output --tag-output -np 4 simpleFoam -parallel |
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Orphaned report |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2013-08-16 15:58 |
|
New Issue | |
| 2013-08-21 09:57 |
|
Note Added: 0002431 | |
| 2013-08-21 10:13 |
|
Note Added: 0002432 | |
| 2015-01-01 14:09 | henry | Note Added: 0003439 | |
| 2015-01-01 14:09 | henry | Status | new => closed |
| 2015-01-01 14:09 | henry | Assigned To | => henry |
| 2015-01-01 14:09 | henry | Resolution | open => unable to reproduce |
