port r11541 from 1.1: Make sure pheft can schedule a calibrated CUDA-only task

tests/Makefile.am

@@ -222,6 +222,7 @@ noinst_PROGRAMS =				\
 	parallel_tasks/parallel_kernels		\
 	parallel_tasks/parallel_kernels_spmd	\
 	parallel_tasks/spmd_peager		\
+	parallel_tasks/cuda_only		\
 	perfmodels/regression_based		\
 	perfmodels/non_linear_regression_based	\
 	perfmodels/feed				\

tests/parallel_tasks/cuda_only.c

@@ -0,0 +1,108 @@
+/* StarPU --- Runtime system for heterogeneous multicore architectures.
+ *
+ * Copyright (C) 2013  Université de Bordeaux 1
+ *
+ * StarPU is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at
+ * your option) any later version.
+ *
+ * StarPU is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * See the GNU Lesser General Public License in COPYING.LGPL for more details.
+ */
+
+#include <config.h>
+#include <starpu.h>
+#include <limits.h>
+#include <unistd.h>
+#include "../helper.h"
+
+void codelet_null(void *descr[], STARPU_ATTRIBUTE_UNUSED void *_args)
+{
+}
+
+struct starpu_perfmodel model =
+{
+	.type = STARPU_HISTORY_BASED,
+	.symbol = "test"
+};
+
+static struct starpu_codelet cl =
+{
+	.cuda_funcs = {codelet_null, NULL},
+	.model = &model,
+	.nbuffers = 1,
+	.modes = {STARPU_R}
+};
+
+struct starpu_perfmodel model2 =
+{
+	.type = STARPU_HISTORY_BASED,
+	.symbol = "test2"
+};
+
+static struct starpu_codelet cl2 =
+{
+	.cuda_funcs = {codelet_null, NULL},
+	.model = &model2,
+	.nbuffers = 1,
+	.modes = {STARPU_W}
+};
+
+
+int main(int argc, char **argv)
+{
+	int ret;
+	starpu_data_handle_t handle;
+	unsigned data;
+
+        struct starpu_conf conf;
+	starpu_conf_init(&conf);
+	conf.sched_policy_name = "pheft";
+
+	ret = starpu_init(&conf);
+	if (ret == -ENODEV) return STARPU_TEST_SKIPPED;
+	STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
+
+	starpu_variable_data_register(&handle, STARPU_MAIN_RAM, (uintptr_t)&data, sizeof(data));
+
+	unsigned iter;
+	struct starpu_task *task;
+	for (iter = 0; iter < 100; iter++)
+	{
+		task = starpu_task_create();
+		task->cl = &cl;
+		task->handles[0] = handle;
+
+		ret = starpu_task_submit(task);
+		if (ret == -ENODEV) goto enodev;
+		STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_submit");
+
+		task = starpu_task_create();
+		task->cl = &cl2;
+		task->handles[0] = handle;
+
+		ret = starpu_task_submit(task);
+		if (ret == -ENODEV) goto enodev;
+		STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_submit");
+	}
+
+	ret = starpu_task_wait_for_all();
+	STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_wait_for_all");
+
+	starpu_data_unregister(handle);
+	starpu_shutdown();
+
+	STARPU_RETURN(EXIT_SUCCESS);
+
+enodev:
+	starpu_data_unregister(handle);
+	fprintf(stderr, "WARNING: No one can execute this task\n");
+	/* yes, we do not perform the computation but we did detect that no one
+ 	 * could perform the kernel, so this is not an error from StarPU */
+	starpu_shutdown();
+	STARPU_RETURN(STARPU_TEST_SKIPPED);
+}