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--- library:computing:xios_impi_troubles [2025/12/30 11:10]
84.88.52.107 old revision restored (2025/12/05 11:11)
+++ library:computing:xios_impi_troubles [2026/01/13 21:01] (current)
84.88.52.107 old revision restored (2026/01/01 12:01)
@@ Line 196: / Line 196: @@
-**Actions taken:** Given that the error is a floating invalid we disabled the -fpe0 flag, but we still were having the same problem. Then we disabled compiler optimizations (use -O0) and the problem disappeared, but this obviously has an effect on performance. At second instance we activated -O2 optimizations and the model runs, so the performance loss is not that important as it would be running with -O0.
+**Actions taken:** Given that the error is a floating invalid we disabled the -fpe0 flag, but we still were having the same problem. Then we disabled compiler optimizations (use -O0) and the problem disappeared, but this obviously has an effect on performance.
 **Diagnosis:**
-**Solution:** Use -O2 flag (instead of -O2).
+**Solution:** Disabling compiler optimizations (activate -O0).
 ==== Issue 3: MPI kills XIOS when writing model output ====
@@ Line 270: / Line 270: @@
 [[https://github.com/01org/psm/blob/master/ptl_ips/ips_proto.c]]
-==== Issue 4: EC-Earth enters in a dead lock when using fabric (OFA network fabrics) module ====
+==== Issue 4: ====
 **Environment:** Auto-EC-Earth 3.2.2_develop_MN4 (EC-Earth 3.2 r4063-runtime-unification).
@@ Line 280: / Line 280: @@
   * Flags: -O0 & -O3
-**Problem:** When loading module fabric, created by Ops to solve Issue 2 on NEMO (assertion invalid), EC-Earth enters in a deadlock. Our NEMO benchmark was rather running, but MPI_Finalize was not working and jobs never finished until wallclock time limit was reached.
+**Problem:**
 **Actions taken:**

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