get min dt across processors

mbkuhn · mbkuhn · commit 89b2ea9af279 · 2025-04-01T15:00:13.000-06:00
diff --git a/src/OversetSimulation.cpp b/src/OversetSimulation.cpp
@@ -159,6 +159,8 @@ void OversetSimulation::run_timesteps(
             }
 
             if (inonlin < 1) {
+                MPI_Allreduce(
+                    MPI_IN_PLACE, &dt, 1, MPI_DOUBLE, MPI_MIN, m_comm);
                 for (auto& ss : m_solvers) ss->call_set_timestep_size(dt);
             }
 

Original file line number	Diff line number	Diff line change
`@@ -159,6 +159,8 @@ void OversetSimulation::run_timesteps(`
`159`	`159`	`}`
`160`	`160`
`161`	`161`	`if (inonlin < 1) {`
	`162`	`+ MPI_Allreduce(`
	`163`	`+ MPI_IN_PLACE, &dt, 1, MPI_DOUBLE, MPI_MIN, m_comm);`
`162`	`164`	`for (auto& ss : m_solvers) ss->call_set_timestep_size(dt);`
`163`	`165`	`}`
`164`	`166`