Merge release-5-0 into master

[alexxy/gromacs.git] / src / gromacs / mdlib / forcerec.c

diff --git a/src/gromacs/mdlib/forcerec.c b/src/gromacs/mdlib/forcerec.c
index e3fe4cbd9a637bc861775fa54d83dbf20b015eb2..c1caca163df069ed4ab2978b657aec2552306d79 100644 (file)
--- a/src/gromacs/mdlib/forcerec.c
+++ b/src/gromacs/mdlib/forcerec.c
@@ -1775,6 +1775,15 @@ static void pick_nbnxn_kernel(FILE                *fp,
                 lookup_nbnxn_kernel_name(*kernel_type),
                 nbnxn_kernel_pairlist_simple(*kernel_type) ? NBNXN_CPU_CLUSTER_I_SIZE : NBNXN_GPU_CLUSTER_SIZE,
                 nbnxn_kernel_to_cj_size(*kernel_type));
+
+        if (nbnxnk4x4_PlainC == *kernel_type ||
+            nbnxnk8x8x8_PlainC == *kernel_type)
+        {
+            md_print_warn(cr, fp,
+                          "WARNING: Using the slow %s kernels. This should\n"
+                          "not happen during routine usage on supported platforms.\n\n",
+                          lookup_nbnxn_kernel_name(*kernel_type));
+        }
     }
 }