aboutsummaryrefslogtreecommitdiffstats
path: root/tests/bandwidth-client.c
diff options
context:
space:
mode:
Diffstat (limited to 'tests/bandwidth-client.c')
-rw-r--r--tests/bandwidth-client.c220
1 files changed, 220 insertions, 0 deletions
diff --git a/tests/bandwidth-client.c b/tests/bandwidth-client.c
new file mode 100644
index 0000000..e9109e1
--- /dev/null
+++ b/tests/bandwidth-client.c
@@ -0,0 +1,220 @@
+/*
+ * Copyright © 2008-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/time.h>
+#include <errno.h>
+
+#include <modbus.h>
+
+#define G_MSEC_PER_SEC 1000
+
+uint32_t gettime_ms(void)
+{
+ struct timeval tv;
+ gettimeofday (&tv, NULL);
+
+ return (uint32_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
+}
+
+enum {
+ TCP,
+ RTU
+};
+
+/* Tests based on PI-MBUS-300 documentation */
+int main(int argc, char *argv[])
+{
+ uint8_t *tab_bit;
+ uint16_t *tab_reg;
+ modbus_t *ctx;
+ int i;
+ int nb_points;
+ double elapsed;
+ uint32_t start;
+ uint32_t end;
+ uint32_t bytes;
+ uint32_t rate;
+ int rc;
+ int n_loop;
+ int use_backend;
+
+ if (argc > 1) {
+ if (strcmp(argv[1], "tcp") == 0) {
+ use_backend = TCP;
+ n_loop = 100000;
+ } else if (strcmp(argv[1], "rtu") == 0) {
+ use_backend = RTU;
+ n_loop = 100;
+ } else {
+ printf("Usage:\n %s [tcp|rtu] - Modbus client to measure data bandwith\n\n", argv[0]);
+ exit(1);
+ }
+ } else {
+ /* By default */
+ use_backend = TCP;
+ n_loop = 100000;
+ }
+
+ if (use_backend == TCP) {
+ ctx = modbus_new_tcp("127.0.0.1", 1502);
+ } else {
+ ctx = modbus_new_rtu("/dev/ttyUSB1", 115200, 'N', 8, 1);
+ modbus_set_slave(ctx, 1);
+ }
+ if (modbus_connect(ctx) == -1) {
+ fprintf(stderr, "Connexion failed: %s\n",
+ modbus_strerror(errno));
+ modbus_free(ctx);
+ return -1;
+ }
+
+ /* Allocate and initialize the memory to store the status */
+ tab_bit = (uint8_t *) malloc(MODBUS_MAX_READ_BITS * sizeof(uint8_t));
+ memset(tab_bit, 0, MODBUS_MAX_READ_BITS * sizeof(uint8_t));
+
+ /* Allocate and initialize the memory to store the registers */
+ tab_reg = (uint16_t *) malloc(MODBUS_MAX_READ_REGISTERS * sizeof(uint16_t));
+ memset(tab_reg, 0, MODBUS_MAX_READ_REGISTERS * sizeof(uint16_t));
+
+ printf("READ BITS\n\n");
+
+ nb_points = MODBUS_MAX_READ_BITS;
+ start = gettime_ms();
+ for (i=0; i<n_loop; i++) {
+ rc = modbus_read_bits(ctx, 0, nb_points, tab_bit);
+ if (rc == -1) {
+ fprintf(stderr, "%s\n", modbus_strerror(errno));
+ return -1;
+ }
+ }
+ end = gettime_ms();
+ elapsed = end - start;
+
+ rate = (n_loop * nb_points) * G_MSEC_PER_SEC / (end - start);
+ printf("Transfert rate in points/seconds:\n");
+ printf("* %d points/s\n", rate);
+ printf("\n");
+
+ bytes = n_loop * (nb_points / 8) + ((nb_points % 8) ? 1 : 0);
+ rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+ printf("Values:\n");
+ printf("* %d x %d values\n", n_loop, nb_points);
+ printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+ printf("* %d KiB/s\n", rate);
+ printf("\n");
+
+ /* TCP: Query and reponse header and values */
+ bytes = 12 + 9 + (nb_points / 8) + ((nb_points % 8) ? 1 : 0);
+ printf("Values and TCP Modbus overhead:\n");
+ printf("* %d x %d bytes\n", n_loop, bytes);
+ bytes = n_loop * bytes;
+ rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+ printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+ printf("* %d KiB/s\n", rate);
+ printf("\n\n");
+
+ printf("READ REGISTERS\n\n");
+
+ nb_points = MODBUS_MAX_READ_REGISTERS;
+ start = gettime_ms();
+ for (i=0; i<n_loop; i++) {
+ rc = modbus_read_registers(ctx, 0, nb_points, tab_reg);
+ if (rc == -1) {
+ fprintf(stderr, "%s\n", modbus_strerror(errno));
+ return -1;
+ }
+ }
+ end = gettime_ms();
+ elapsed = end - start;
+
+ rate = (n_loop * nb_points) * G_MSEC_PER_SEC / (end - start);
+ printf("Transfert rate in points/seconds:\n");
+ printf("* %d registers/s\n", rate);
+ printf("\n");
+
+ bytes = n_loop * nb_points * sizeof(uint16_t);
+ rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+ printf("Values:\n");
+ printf("* %d x %d values\n", n_loop, nb_points);
+ printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+ printf("* %d KiB/s\n", rate);
+ printf("\n");
+
+ /* TCP:Query and reponse header and values */
+ bytes = 12 + 9 + (nb_points * sizeof(uint16_t));
+ printf("Values and TCP Modbus overhead:\n");
+ printf("* %d x %d bytes\n", n_loop, bytes);
+ bytes = n_loop * bytes;
+ rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+ printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+ printf("* %d KiB/s\n", rate);
+ printf("\n\n");
+
+ printf("READ AND WRITE REGISTERS\n\n");
+
+ nb_points = MODBUS_MAX_RW_WRITE_REGISTERS;
+ start = gettime_ms();
+ for (i=0; i<n_loop; i++) {
+ rc = modbus_write_and_read_registers(ctx,
+ 0, nb_points, tab_reg,
+ 0, nb_points, tab_reg);
+ if (rc == -1) {
+ fprintf(stderr, "%s\n", modbus_strerror(errno));
+ return -1;
+ }
+ }
+ end = gettime_ms();
+ elapsed = end - start;
+
+ rate = (n_loop * nb_points) * G_MSEC_PER_SEC / (end - start);
+ printf("Transfert rate in points/seconds:\n");
+ printf("* %d registers/s\n", rate);
+ printf("\n");
+
+ bytes = n_loop * nb_points * sizeof(uint16_t);
+ rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+ printf("Values:\n");
+ printf("* %d x %d values\n", n_loop, nb_points);
+ printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+ printf("* %d KiB/s\n", rate);
+ printf("\n");
+
+ /* TCP:Query and reponse header and values */
+ bytes = 12 + 9 + (nb_points * sizeof(uint16_t));
+ printf("Values and TCP Modbus overhead:\n");
+ printf("* %d x %d bytes\n", n_loop, bytes);
+ bytes = n_loop * bytes;
+ rate = bytes / 1024 * G_MSEC_PER_SEC / (end - start);
+ printf("* %.3f ms for %d bytes\n", elapsed, bytes);
+ printf("* %d KiB/s\n", rate);
+ printf("\n");
+
+ /* Free the memory */
+ free(tab_bit);
+ free(tab_reg);
+
+ /* Close the connection */
+ modbus_close(ctx);
+ modbus_free(ctx);
+
+ return 0;
+}