Warn user when he requests recalibration in simgrid mode

src/core/workers.c

@@ -1009,6 +1009,16 @@ void _starpu_conf_check_environment(struct starpu_conf *conf)
 	_starpu_conf_set_value_against_environment("STARPU_NOPENCL", &conf->nopencl);
 	_starpu_conf_set_value_against_environment("STARPU_CALIBRATE", &conf->calibrate);
 	_starpu_conf_set_value_against_environment("STARPU_BUS_CALIBRATE", &conf->bus_calibrate);
+#ifdef STARPU_SIMGRID
+	if (conf->calibrate == 2)
+	{
+		_STARPU_DISP("Warning: History will be cleared due to calibrate or STARPU_CALIBRATE being set to 2. This will prevent simgrid from having task simulation times!");
+	}
+	if (conf->bus_calibrate)
+	{
+		_STARPU_DISP("Warning: Bus calibration will be cleared due to bus_calibrate or STARPU_BUS_CALIBRATE being set. This will prevent simgrid from having data transfer simulation times!");
+	}
+#endif
 	_starpu_conf_set_value_against_environment("STARPU_SINGLE_COMBINED_WORKER", &conf->single_combined_worker);
 	_starpu_conf_set_value_against_environment("STARPU_DISABLE_ASYNCHRONOUS_COPY", &conf->disable_asynchronous_copy);
 	_starpu_conf_set_value_against_environment("STARPU_DISABLE_ASYNCHRONOUS_CUDA_COPY", &conf->disable_asynchronous_cuda_copy);