#447 closed Bug (wontfix)
IOF and cutting along latitude
| Reported by: | ebehrens | Owned by: | nemo |
|---|---|---|---|
| Priority: | high | Milestone: | |
| Component: | OCE | Version: | v3.1 |
| Severity: | Keywords: | IOF OFF OPA v3.1 | |
| Cc: |
Description
We performed following experiments of NEMO 3.1 on NEC SX9:
-IOF 4x1 PE, 1215 timesteps (CPU TIME = 2667.269 sec.)
-IOF 1x4 PE, 1215 timesteps (CPU TIME = ) FAILED!!!
-OFFLINE 4x1 PE, 1215 timesteps (CPU TIME = 2661.805 sec )
-OFFLINE 1x4 PE, 1215 timesteps (CPU TIME = 1615.761 sec. )
The experiment with IOF and 1x4 failed with following error:
252 Floating-point zero divide PROG=sbcblk_core.psi_h ELN=29(4001fcd08)
Maybe their is a problem with IOF and extra halos and/or a SX9 specific problem. We can not profit from the performance of "latitude cutting" (1x4) and IOF, which would improve the performance (see http://forge.ipsl.jussieu.fr/nemo/ticket/445).
Commit History (0)
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Change History (9)
comment:1 in reply to: ↑ description ; follow-up: ↓ 2 Changed 16 years ago by ebehrens
comment:2 in reply to: ↑ 1 Changed 16 years ago by ebehrens
I performed a further run with IOF and 1x3 and overlap in j of 2 grid cells to avoid any kind of irregular size of the sub domains. This run was successful, without any error.
comment:3 Changed 12 years ago by vichi
- Resolution set to wontfix
- Status changed from new to closed
comment:4 Changed 9 years ago by nicolasmartin
- Keywords offline added; OFFLINE removed
comment:5 Changed 9 years ago by nicolasmartin
- Keywords nemo_v3_1* added
comment:6 Changed 9 years ago by nicolasmartin
- Keywords OFF added; offline removed
comment:7 Changed 7 years ago by nemo
- Keywords nemo_v3_1* removed
comment:8 Changed 3 years ago by nemo
- Keywords OPA r3.1 added
comment:9 Changed 3 years ago by nemo
- Keywords v3.1 added; r3.1 removed
PS: It's ORCA05.