The spmd_greedy test submits a lot of SPMD parallel-tasks with a pgreedy strategy.

tests/Makefile.am

@@ -532,6 +532,11 @@ parallel_tasks_parallel_kernels_spmd_SOURCES =	\
 	parallel_tasks/parallel_kernels_spmd.c
 
 testbin_PROGRAMS +=				\
+	parallel_tasks/spmd_pgreedy
+parallel_tasks_spmd_pgreedy_SOURCES =	\
+	parallel_tasks/spmd_pgreedy.c
+
+testbin_PROGRAMS +=				\
 	perfmodels/regression_based
 perfmodels_regression_based_SOURCES = 		\
 	perfmodels/regression_based.c

tests/parallel_tasks/spmd_pgreedy.c

@@ -0,0 +1,90 @@
+/*
+ * StarPU
+ * Copyright (C) Université Bordeaux 1, CNRS 2008-2011 (see AUTHORS file)
+ *
+ * This program 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.
+ *
+ * This program 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 <starpu.h>
+#include <limits.h>
+
+#define N	1000
+#define VECTORSIZE	1024
+
+starpu_data_handle v_handle;
+static unsigned *v;
+
+static void codelet_null(void *descr[], __attribute__ ((unused)) void *_args)
+{
+	int worker_size = starpu_combined_worker_get_size();
+	assert(worker_size > 0);
+
+//	fprintf(stderr, "WORKERSIZE : %d\n", worker_size);
+
+	usleep(1000/worker_size);
+#if 0
+	int id = starpu_worker_get_id();
+	int combined_id = starpu_combined_worker_get_id();
+	int rank = starpu_combined_worker_get_rank();
+	fprintf(stderr, "worker id %d - combined id %d - worker size %d - SPMD rank %d\n", id, combined_id, worker_size, rank);
+#endif
+}
+
+static starpu_codelet cl = {
+	.where = STARPU_CPU|STARPU_CUDA|STARPU_OPENCL,
+	.type = STARPU_SPMD,
+	.max_parallelism = INT_MAX,
+	.cpu_func = codelet_null,
+	.cuda_func = codelet_null,
+        .opencl_func = codelet_null,
+	.nbuffers = 1
+};
+
+
+int main(int argc, char **argv)
+{
+        struct starpu_conf conf;
+	starpu_conf_init(&conf);
+        conf.sched_policy_name = "pgreedy",
+
+	starpu_init(&conf);
+
+	starpu_data_malloc_pinned_if_possible((void **)&v, VECTORSIZE*sizeof(unsigned));
+	starpu_vector_data_register(&v_handle, 0, (uintptr_t)v, VECTORSIZE, sizeof(unsigned));
+
+	unsigned iter, worker;
+	for (iter = 0; iter < N; iter++)
+	{
+		/* execute a task on that worker */
+		struct starpu_task *task = starpu_task_create();
+		task->cl = &cl;
+
+		task->buffers[0].handle = v_handle;
+		task->buffers[0].mode = STARPU_R;
+
+		int ret = starpu_task_submit(task);
+		if (ret == -ENODEV)
+			goto enodev;
+	}
+
+	starpu_task_wait_for_all();
+
+	starpu_shutdown();
+
+	return 0;
+
+enodev:
+	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 */
+	return 0;
+}