enable GPU sharing among tMPI ranks

[alexxy/gromacs.git] / src / gmxlib / gmx_detect_hardware.c

diff --git a/src/gmxlib/gmx_detect_hardware.c b/src/gmxlib/gmx_detect_hardware.c
index 2a3156eeaad73e0b45f850ce9fdc10c659a36ad6..e918a78c213e7a5b418a33f16d04637f2d088860 100644 (file)
--- a/src/gmxlib/gmx_detect_hardware.c
+++ b/src/gmxlib/gmx_detect_hardware.c
@@ -374,19 +374,11 @@ void gmx_check_hw_runconf_consistency(FILE *fplog,
 
             same_count = gmx_count_gpu_dev_shared(&hw_opt->gpu_opt);
 
-            if (btMPI && same_count > 0)
-            {
-                gmx_fatal(FARGS,
-                          "Invalid GPU assignment: can't share a GPU among multiple thread-MPI threads.\n"
-                          "Use MPI if you are sure that you want to assign a GPU to multiple threads.");
-            }
-
             if (same_count > 0)
             {
                 md_print_warn(cr, fplog,
                               "NOTE: Potentially sub-optimal launch configuration: you assigned %s to\n"
-                              "      multiple %s%s; this should be avoided as it can cause\n"
-                              "      performance loss.\n",
+                              "      multiple %s%s; this can cause performance loss.\n",
                               same_count > 1 ? "GPUs" : "a GPU", th_or_proc, btMPI ? "s" : "es");
             }
         }