Add a warning for Aitken relaxation and parallel coupling schemes (#1042)

davidscn · web-flow · commit 40eca9dea480 · 2021-07-14T13:08:11.000+02:00
Co-authored-by: David Schneider &lt;dav.schneider@tum.de&gt;
diff --git a/src/cplscheme/config/CouplingSchemeConfiguration.cpp b/src/cplscheme/config/CouplingSchemeConfiguration.cpp
@@ -7,6 +7,7 @@
 #include <utility>
 #include <vector>
 #include "acceleration/Acceleration.hpp"
+#include "acceleration/AitkenAcceleration.hpp"
 #include "acceleration/config/AccelerationConfiguration.hpp"
 #include "cplscheme/BaseCouplingScheme.hpp"
 #include "cplscheme/BiCouplingScheme.hpp"
@@ -1110,6 +1111,13 @@ void CouplingSchemeConfiguration::setParallelAcceleration(
       checkIfDataIsExchanged(dataID);
     }
     scheme->setAcceleration(_accelerationConfig->getAcceleration());
+
+    if (dynamic_cast<acceleration::AitkenAcceleration *>(_accelerationConfig->getAcceleration().get()) != nullptr)
+      PRECICE_WARN("You configured participant \"{}\" in a parallel-implicit coupling scheme with \"Aitken\" "
+                   "acceleration, which is known to perform bad in parallel coupling schemes. "
+                   "See https://precice.org/configuration-acceleration.html#dynamic-aitken-under-relaxation for details."
+                   "Consider switching to a serial-implicit coupling scheme or changing the acceleration method.",
+                   participant);
   }
 }
 
