forget test :)

tests/disk/disk_compute.c

@@ -0,0 +1,133 @@
+/* StarPU --- Runtime system for heterogeneous multicore architectures.
+ *
+ * Copyright (C) 2013 Corentin Salingue
+ *
+ * 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.
+ */
+
+/* Try to write into disk memory
+ * Use mechanism to push datas from main ram to disk ram
+ */
+
+#include <starpu.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+
+/* size of one vector */
+#define	NX	(30*1000000/sizeof(double))
+#define FPRINTF(ofile, fmt, ...) do { if (!getenv("STARPU_SSILENT")) {fprintf(ofile, fmt, ## __VA_ARGS__); }} while(0)
+
+
+int main(int argc, char **argv)
+{
+	double * A,*B,*C,*D,*E,*F;
+
+	/* limit main ram to force to push in disk */
+	putenv("STARPU_LIMIT_CPU_MEM=160");
+
+	/* Initialize StarPU with default configuration */
+	int ret = starpu_init(NULL);
+
+	if (ret == -ENODEV) goto enodev;
+
+	/* register a disk */
+	int new_dd = starpu_disk_register(&starpu_disk_stdio_ops, (void *) "/tmp/", 1024*1024*200);
+	/* can't write on /tmp/ */
+	if (new_dd == -ENOENT) goto enoent;
+	
+	unsigned dd = (unsigned) new_dd;
+
+	/* allocate two memory spaces */
+	starpu_malloc_flags((void **)&A, NX*sizeof(double), STARPU_MALLOC_COUNT);
+	starpu_malloc_flags((void **)&F, NX*sizeof(double), STARPU_MALLOC_COUNT);
+
+	FPRINTF(stderr, "TEST DISK MEMORY \n");
+
+	unsigned int j;
+	/* initialization with bad values */
+	for(j = 0; j < NX; ++j)
+	{
+		A[j] = j;
+		F[j] = -j;
+	}
+
+	/* Tell StaPU to associate the "vector" vector with the "vector_handle"
+	 * identifier. When a task needs to access a piece of data, it should
+	 * refer to the handle that is associated to it.
+	 * In the case of the "vector" data interface:
+	 *  - the first argument of the registration method is a pointer to the
+	 *    handle that should describe the data
+	 *  - the second argument is the memory node where the data (ie. "vector")
+	 *    resides initially: 0 stands for an address in main memory, as
+	 *    opposed to an adress on a GPU for instance.
+	 *  - the third argument is the adress of the vector in RAM
+	 *  - the fourth argument is the number of elements in the vector
+	 *  - the fifth argument is the size of each element.
+	 */
+	starpu_data_handle_t vector_handleA, vector_handleB, vector_handleC, vector_handleD, vector_handleE, vector_handleF;
+
+	/* register vector in starpu */
+	starpu_vector_data_register(&vector_handleA, 0, (uintptr_t)A, NX, sizeof(double));
+	starpu_vector_data_register(&vector_handleB, -1, (uintptr_t) NULL, NX, sizeof(double));	
+	starpu_vector_data_register(&vector_handleC, -1, (uintptr_t) NULL, NX, sizeof(double));
+	starpu_vector_data_register(&vector_handleD, -1, (uintptr_t) NULL, NX, sizeof(double));
+	starpu_vector_data_register(&vector_handleE, -1, (uintptr_t) NULL, NX, sizeof(double));
+	starpu_vector_data_register(&vector_handleF, 0, (uintptr_t)F, NX, sizeof(double));
+
+	/* copy vector A->B, B->C... */
+	starpu_data_cpy(vector_handleB, vector_handleA, 0, NULL, NULL);
+	starpu_data_cpy(vector_handleC, vector_handleB, 0, NULL, NULL);
+	starpu_data_cpy(vector_handleD, vector_handleC, 0, NULL, NULL);
+	starpu_data_cpy(vector_handleE, vector_handleD, 0, NULL, NULL);
+	starpu_data_cpy(vector_handleF, vector_handleE, 0, NULL, NULL);
+
+	/* StarPU does not need to manipulate the array anymore so we can stop
+ 	 * monitoring it */
+
+	/* free them */
+	starpu_data_unregister(vector_handleA);
+	starpu_data_unregister(vector_handleB);
+	starpu_data_unregister(vector_handleC);
+	starpu_data_unregister(vector_handleD);
+	starpu_data_unregister(vector_handleE);
+	starpu_data_unregister(vector_handleF);
+
+	starpu_disk_unregister(dd);
+
+	/* check if computation is correct */
+	int try = 1;
+	for (j = 0; j < NX; ++j)
+		if (A[j] != F[j])
+		{
+			printf("Fail A %f != F %f \n", A[j], F[j]);
+			try = 0;
+		}
+
+	/* free last vectors */
+	starpu_free_flags(A, NX*sizeof(double), STARPU_MALLOC_COUNT);
+	starpu_free_flags(F, NX*sizeof(double), STARPU_MALLOC_COUNT);
+
+	/* terminate StarPU, no task can be submitted after */
+	starpu_shutdown();
+
+	if(try)
+		FPRINTF(stderr, "TEST SUCCESS\n");
+	else
+		FPRINTF(stderr, "TEST FAIL\n");
+	return (try ? EXIT_SUCCESS : EXIT_FAILURE);
+
+enodev:
+	return 77;
+enoent:
+	return 77;
+}