app/eventdev_dump: introduce eventdev_dump application

diff --git a/app/eventdev_dump/main.c b/app/eventdev_dump/main.c
new file mode 100644
index 0000000000..c80baa4c45
--- /dev/null
+++ b/app/eventdev_dump/main.c
@@ -0,0 +1,284 @@ 
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018-2019 Intel Corporation
+ */
+
+#include <getopt.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+
+#include <rte_eal.h>
+#include <rte_debug.h>
+#include <rte_eventdev.h>
+
+/* Note - port_queue_id in xstats APIs is 8 bits,   so we have a maximum of
+ * 256 ports and queues
+ */
+#define MAX_PORTS_QUEUES 256
+int num_ports;
+uint8_t ports[MAX_PORTS_QUEUES];
+int num_queues;
+uint8_t queues[MAX_PORTS_QUEUES];
+
+int evdev_id;
+bool do_dump;
+bool do_device_stats;
+bool do_all_ports;
+bool do_all_queues;
+bool do_reset;
+
+/* No required options */
+static struct option long_options[] = {
+	{0, 0, 0, 0}
+};
+
+static void
+usage(void)
+{
+	const char *usage_str =
+		"Usage: eventdev_dump [options]\n"
+		"Options:\n"
+		" -i <dev_id>		Eventdev id, default is 0\n"
+		" -D			Dump\n"
+		" -P			Get port stats for all ports\n"
+		" -p <port num>		Get port stats for specified port\n"
+		" -Q			Get queue stats for all queues\n"
+		" -q <queue num>	Get queue stats for specified queue\n"
+		" -r			Reset stats after reading them\n"
+		"\n";
+
+	printf("%s\n", usage_str);
+	exit(1);
+}
+
+static void
+parse_app_args(int argc, char **argv)
+{
+	/* Parse cli options*/
+	int option_index;
+	int c;
+	opterr = 0;
+
+	for (;;) {
+		c = getopt_long(argc, argv, "dDi:p:Pq:Qr", long_options,
+				&option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'd':
+			do_device_stats = true;
+			break;
+		case 'D':
+			do_dump = true;
+			break;
+		case 'i':
+			evdev_id = atoi(optarg);
+			break;
+		case 'p':
+			ports[num_ports] = atoi(optarg);
+			num_ports++;
+			break;
+		case 'P':
+			do_all_ports = true;
+			break;
+		case 'q':
+			queues[num_queues] = atoi(optarg);
+			num_queues++;
+			break;
+		case 'Q':
+			do_all_queues = true;
+			break;
+		case 'r':
+			do_reset = true;
+			break;
+		default:
+			usage();
+		}
+	}
+}
+
+static int
+dump_all(int evdev_id)
+{
+	int ret = 0;
+
+	ret = rte_event_dev_dump(evdev_id, stdout);
+	return ret;
+}
+
+static void
+get_stats(uint8_t dev_id,
+	  enum rte_event_dev_xstats_mode mode,
+	  uint8_t queue_port_id,
+	  bool reset)
+{
+	int ret;
+	struct rte_event_dev_xstats_name *xstats_names;
+	unsigned int *ids;
+	unsigned int size;
+	int i;
+
+
+	/* Get amount of storage required */
+	ret = rte_event_dev_xstats_names_get(dev_id,
+					     mode,
+					     queue_port_id,
+					     NULL, /* names */
+					     NULL, /* ids */
+					     0);   /* num */
+
+	if (ret < 0)
+		rte_panic("rte_event_dev_xstats_names_get err %d\n", ret);
+
+	if (ret == 0) {
+		printf(
+		"No stats available for this item, mode=%d, queue_port_id=%d\n",
+			mode, queue_port_id);
+		return;
+	}
+
+	size = (unsigned int)ret; /* number of names */
+
+	/* Get memory to hold stat names, IDs, and values */
+
+	xstats_names = malloc(sizeof(struct rte_event_dev_xstats_name) * size);
+	ids = malloc(sizeof(unsigned int) * size);
+
+
+	if (!xstats_names || !ids)
+		rte_panic("unable to alloc memory for stats retrieval\n");
+
+	ret = rte_event_dev_xstats_names_get(dev_id, mode, queue_port_id,
+					     xstats_names, ids,
+					     size);
+	if (ret != (int)size)
+		rte_panic("rte_event_dev_xstats_names_get err %d\n", ret);
+
+	if (!reset) {
+		uint64_t *values;
+
+		values = malloc(sizeof(uint64_t) * size);
+		if (!values)
+			rte_panic("unable to alloc memory for stats retrieval\n");
+
+		ret = rte_event_dev_xstats_get(dev_id, mode, queue_port_id,
+					       ids, values, size);
+
+		if (ret != (int)size)
+			rte_panic("rte_event_dev_xstats_get err %d\n", ret);
+
+		for (i = 0; i < (int)size; i++) {
+			printf("id (%u) %s = %"PRIu64"\n",
+				ids[i], &xstats_names[i].name[0], values[i]);
+		}
+
+		free(values);
+	} else
+		rte_event_dev_xstats_reset(dev_id, mode, queue_port_id,
+					   ids, size);
+
+	free(xstats_names);
+	free(ids);
+}
+
+static void
+process_stats(bool reset)
+{
+	int i;
+
+	if (do_device_stats) {
+		get_stats(evdev_id,
+			  RTE_EVENT_DEV_XSTATS_DEVICE,
+			  0,
+			  reset);
+	}
+
+	if (do_all_ports) {
+		for (i = 0; i < MAX_PORTS_QUEUES; i++) {
+			get_stats(evdev_id,
+				  RTE_EVENT_DEV_XSTATS_PORT,
+				  i,
+				  reset);
+		}
+	} else {
+		for (i = 0; i < num_ports; i++) {
+			get_stats(evdev_id,
+				  RTE_EVENT_DEV_XSTATS_PORT,
+				  ports[i],
+				  reset);
+		}
+	}
+
+	if (do_all_queues) {
+		for (i = 0; i < MAX_PORTS_QUEUES; i++) {
+			get_stats(evdev_id,
+				  RTE_EVENT_DEV_XSTATS_QUEUE,
+				  i,
+				  reset);
+		}
+	} else {
+		for (i = 0; i < num_queues; i++) {
+			get_stats(evdev_id,
+				  RTE_EVENT_DEV_XSTATS_QUEUE,
+				  queues[i],
+				  reset);
+		}
+	}
+}
+
+int
+main(int argc, char **argv)
+{
+	int diag;
+	int ret;
+	int i;
+	char c_flag[] = "-c1";
+	char n_flag[] = "-n4";
+	char mp_flag[] = "--proc-type=secondary";
+	char *argp[argc + 3];
+
+	argp[0] = argv[0];
+	argp[1] = c_flag;
+	argp[2] = n_flag;
+	argp[3] = mp_flag;
+
+	for (i = 1; i < argc; i++)
+		argp[i + 3] = argv[i];
+
+	argc += 3;
+
+	diag = rte_eal_init(argc, argp);
+	if (diag < 0)
+		rte_panic("Cannot init EAL\n");
+
+	argc -= diag;
+	argv += (diag - 3);
+
+	/* Parse cli options*/
+	parse_app_args(argc, argv);
+
+	const uint8_t ndevs = rte_event_dev_count();
+	if (ndevs == 0)
+		rte_panic("No event devs found. Do you need"
+			  " to pass in a --vdev flag?\n");
+	if (ndevs > 1)
+		printf("Warning: More than one event dev, but using idx 0\n");
+
+	if (do_dump) {
+		ret = dump_all(evdev_id);
+		if (ret)
+			rte_panic("dump failed with err=%d\n", ret);
+	}
+
+	/* Get and output any stats requested on the command line */
+	process_stats(false);
+
+	/* Reset the stats we just output? */
+	if (do_reset)
+		process_stats(true);
+
+	return 0;
+}
diff --git a/app/eventdev_dump/meson.build b/app/eventdev_dump/meson.build
new file mode 100644
index 0000000000..70d7db52d1
--- /dev/null
+++ b/app/eventdev_dump/meson.build
@@ -0,0 +1,5 @@ 
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2020 Intel Corporation
+
+sources = files('main.c')
+deps += ['eventdev']
diff --git a/app/meson.build b/app/meson.build
index 93d8c15032..06aecefca3 100644
--- a/app/meson.build
+++ b/app/meson.build
@@ -18,6 +18,7 @@  apps = [
         'test-pmd',
         'test-regex',
         'test-sad',
+	'eventdev_dump',
 ]
 
 default_cflags = machine_args + ['-DALLOW_EXPERIMENTAL_API']