Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 729 insertions, 0 deletions

diff --git a/src/spdk/test/nvme/reset/.gitignore b/src/spdk/test/nvme/reset/.gitignore
new file mode 100644
index 00000000..a16781b1
--- /dev/null
+++ b/src/spdk/test/nvme/reset/.gitignore
@@ -0,0 +1 @@
+reset
diff --git a/src/spdk/test/nvme/reset/Makefile b/src/spdk/test/nvme/reset/Makefile
new file mode 100644
index 00000000..440f385c
--- /dev/null
+++ b/src/spdk/test/nvme/reset/Makefile
@@ -0,0 +1,39 @@
+#
+#  BSD LICENSE
+#
+#  Copyright (c) Intel Corporation.
+#  All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions
+#  are met:
+#
+#    * Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above copyright
+#      notice, this list of conditions and the following disclaimer in
+#      the documentation and/or other materials provided with the
+#      distribution.
+#    * Neither the name of Intel Corporation nor the names of its
+#      contributors may be used to endorse or promote products derived
+#      from this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+SPDK_ROOT_DIR := $(abspath $(CURDIR)/../../..)
+include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
+
+APP = reset
+
+include $(SPDK_ROOT_DIR)/mk/nvme.libtest.mk
diff --git a/src/spdk/test/nvme/reset/reset.c b/src/spdk/test/nvme/reset/reset.c
new file mode 100644
index 00000000..fe2004e8
--- /dev/null
+++ b/src/spdk/test/nvme/reset/reset.c
@@ -0,0 +1,689 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "spdk/stdinc.h"
+
+#include "spdk/nvme.h"
+#include "spdk/env.h"
+#include "spdk/string.h"
+
+struct ctrlr_entry {
+	struct spdk_nvme_ctrlr	*ctrlr;
+	struct ctrlr_entry	*next;
+	char			name[1024];
+};
+
+struct ns_entry {
+	struct spdk_nvme_ns	*ns;
+	struct spdk_nvme_ctrlr	*ctrlr;
+	struct ns_entry		*next;
+	uint32_t		io_size_blocks;
+	uint64_t		size_in_ios;
+	char			name[1024];
+};
+
+struct ns_worker_ctx {
+	struct ns_entry		*entry;
+	struct spdk_nvme_qpair	*qpair;
+	uint64_t		io_completed;
+	uint64_t		io_completed_error;
+	uint64_t		io_submitted;
+	uint64_t		current_queue_depth;
+	uint64_t		offset_in_ios;
+	bool			is_draining;
+
+	struct ns_worker_ctx	*next;
+};
+
+struct reset_task {
+	struct ns_worker_ctx	*ns_ctx;
+	void			*buf;
+};
+
+struct worker_thread {
+	struct ns_worker_ctx	*ns_ctx;
+	unsigned		lcore;
+};
+
+static struct spdk_mempool *task_pool;
+
+static struct ctrlr_entry *g_controllers = NULL;
+static struct ns_entry *g_namespaces = NULL;
+static int g_num_namespaces = 0;
+static struct worker_thread *g_workers = NULL;
+
+static uint64_t g_tsc_rate;
+
+static int g_io_size_bytes;
+static int g_rw_percentage;
+static int g_is_random;
+static int g_queue_depth;
+static int g_time_in_sec;
+
+#define  TASK_POOL_NUM 8192
+
+static void
+register_ns(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_ns *ns)
+{
+	struct ns_entry *entry;
+	const struct spdk_nvme_ctrlr_data *cdata;
+
+	if (!spdk_nvme_ns_is_active(ns)) {
+		printf("Skipping inactive NS %u\n", spdk_nvme_ns_get_id(ns));
+		return;
+	}
+
+	entry = malloc(sizeof(struct ns_entry));
+	if (entry == NULL) {
+		perror("ns_entry malloc");
+		exit(1);
+	}
+
+	cdata = spdk_nvme_ctrlr_get_data(ctrlr);
+
+	entry->ns = ns;
+	entry->ctrlr = ctrlr;
+	entry->size_in_ios = spdk_nvme_ns_get_size(ns) /
+			     g_io_size_bytes;
+	entry->io_size_blocks = g_io_size_bytes / spdk_nvme_ns_get_sector_size(ns);
+
+	snprintf(entry->name, 44, "%-20.20s (%-20.20s)", cdata->mn, cdata->sn);
+
+	g_num_namespaces++;
+	entry->next = g_namespaces;
+	g_namespaces = entry;
+}
+
+static void
+register_ctrlr(struct spdk_nvme_ctrlr *ctrlr)
+{
+	int nsid, num_ns;
+	struct spdk_nvme_ns *ns;
+	struct ctrlr_entry *entry = malloc(sizeof(struct ctrlr_entry));
+
+	if (entry == NULL) {
+		perror("ctrlr_entry malloc");
+		exit(1);
+	}
+
+	entry->ctrlr = ctrlr;
+	entry->next = g_controllers;
+	g_controllers = entry;
+
+	num_ns = spdk_nvme_ctrlr_get_num_ns(ctrlr);
+	for (nsid = 1; nsid <= num_ns; nsid++) {
+		ns = spdk_nvme_ctrlr_get_ns(ctrlr, nsid);
+		if (ns == NULL) {
+			continue;
+		}
+		register_ns(ctrlr, ns);
+	}
+}
+
+static void io_complete(void *ctx, const struct spdk_nvme_cpl *completion);
+
+static __thread unsigned int seed = 0;
+
+static void
+submit_single_io(struct ns_worker_ctx *ns_ctx)
+{
+	struct reset_task	*task = NULL;
+	uint64_t		offset_in_ios;
+	int			rc;
+	struct ns_entry		*entry = ns_ctx->entry;
+
+	task = spdk_mempool_get(task_pool);
+	if (!task) {
+		fprintf(stderr, "Failed to get task from task_pool\n");
+		exit(1);
+	}
+
+	task->buf = spdk_dma_zmalloc(g_io_size_bytes, 0x200, NULL);
+	if (!task->buf) {
+		spdk_dma_free(task->buf);
+		fprintf(stderr, "task->buf spdk_dma_zmalloc failed\n");
+		exit(1);
+	}
+
+	task->ns_ctx = ns_ctx;
+	task->ns_ctx->io_submitted++;
+
+	if (g_is_random) {
+		offset_in_ios = rand_r(&seed) % entry->size_in_ios;
+	} else {
+		offset_in_ios = ns_ctx->offset_in_ios++;
+		if (ns_ctx->offset_in_ios == entry->size_in_ios) {
+			ns_ctx->offset_in_ios = 0;
+		}
+	}
+
+	if ((g_rw_percentage == 100) ||
+	    (g_rw_percentage != 0 && ((rand_r(&seed) % 100) < g_rw_percentage))) {
+		rc = spdk_nvme_ns_cmd_read(entry->ns, ns_ctx->qpair, task->buf,
+					   offset_in_ios * entry->io_size_blocks,
+					   entry->io_size_blocks, io_complete, task, 0);
+	} else {
+		rc = spdk_nvme_ns_cmd_write(entry->ns, ns_ctx->qpair, task->buf,
+					    offset_in_ios * entry->io_size_blocks,
+					    entry->io_size_blocks, io_complete, task, 0);
+	}
+
+	if (rc != 0) {
+		fprintf(stderr, "starting I/O failed\n");
+	}
+
+	ns_ctx->current_queue_depth++;
+}
+
+static void
+task_complete(struct reset_task *task, const struct spdk_nvme_cpl *completion)
+{
+	struct ns_worker_ctx	*ns_ctx;
+
+	ns_ctx = task->ns_ctx;
+	ns_ctx->current_queue_depth--;
+
+	if (spdk_nvme_cpl_is_error(completion)) {
+		ns_ctx->io_completed_error++;
+	} else {
+		ns_ctx->io_completed++;
+	}
+
+	spdk_dma_free(task->buf);
+	spdk_mempool_put(task_pool, task);
+
+	/*
+	 * is_draining indicates when time has expired for the test run
+	 * and we are just waiting for the previously submitted I/O
+	 * to complete.  In this case, do not submit a new I/O to replace
+	 * the one just completed.
+	 */
+	if (!ns_ctx->is_draining) {
+		submit_single_io(ns_ctx);
+	}
+}
+
+static void
+io_complete(void *ctx, const struct spdk_nvme_cpl *completion)
+{
+	task_complete((struct reset_task *)ctx, completion);
+}
+
+static void
+check_io(struct ns_worker_ctx *ns_ctx)
+{
+	spdk_nvme_qpair_process_completions(ns_ctx->qpair, 0);
+}
+
+static void
+submit_io(struct ns_worker_ctx *ns_ctx, int queue_depth)
+{
+	while (queue_depth-- > 0) {
+		submit_single_io(ns_ctx);
+	}
+}
+
+static void
+drain_io(struct ns_worker_ctx *ns_ctx)
+{
+	ns_ctx->is_draining = true;
+	while (ns_ctx->current_queue_depth > 0) {
+		check_io(ns_ctx);
+	}
+}
+
+static int
+work_fn(void *arg)
+{
+	uint64_t tsc_end = spdk_get_ticks() + g_time_in_sec * g_tsc_rate;
+	struct worker_thread *worker = (struct worker_thread *)arg;
+	struct ns_worker_ctx *ns_ctx = NULL;
+	bool did_reset = false;
+
+	printf("Starting thread on core %u\n", worker->lcore);
+
+	/* Submit initial I/O for each namespace. */
+	ns_ctx = worker->ns_ctx;
+	while (ns_ctx != NULL) {
+		ns_ctx->qpair = spdk_nvme_ctrlr_alloc_io_qpair(ns_ctx->entry->ctrlr, NULL, 0);
+		if (ns_ctx->qpair == NULL) {
+			fprintf(stderr, "spdk_nvme_ctrlr_alloc_io_qpair() failed on core %u\n", worker->lcore);
+			return -1;
+		}
+		submit_io(ns_ctx, g_queue_depth);
+		ns_ctx = ns_ctx->next;
+	}
+
+	while (1) {
+		/*
+		 * Check for completed I/O for each controller. A new
+		 * I/O will be submitted in the io_complete callback
+		 * to replace each I/O that is completed.
+		 */
+		ns_ctx = worker->ns_ctx;
+		while (ns_ctx != NULL) {
+			check_io(ns_ctx);
+			ns_ctx = ns_ctx->next;
+		}
+
+		if (!did_reset && ((tsc_end - spdk_get_ticks()) / g_tsc_rate) > (uint64_t)g_time_in_sec / 2) {
+			ns_ctx = worker->ns_ctx;
+			while (ns_ctx != NULL) {
+				if (spdk_nvme_ctrlr_reset(ns_ctx->entry->ctrlr) < 0) {
+					fprintf(stderr, "nvme reset failed.\n");
+					return -1;
+				}
+				ns_ctx = ns_ctx->next;
+			}
+			did_reset = true;
+		}
+
+		if (spdk_get_ticks() > tsc_end) {
+			break;
+		}
+	}
+
+	ns_ctx = worker->ns_ctx;
+	while (ns_ctx != NULL) {
+		drain_io(ns_ctx);
+		spdk_nvme_ctrlr_free_io_qpair(ns_ctx->qpair);
+		ns_ctx = ns_ctx->next;
+	}
+
+	return 0;
+}
+
+static void usage(char *program_name)
+{
+	printf("%s options", program_name);
+	printf("\n");
+	printf("\t[-q io depth]\n");
+	printf("\t[-s io size in bytes]\n");
+	printf("\t[-w io pattern type, must be one of\n");
+	printf("\t\t(read, write, randread, randwrite, rw, randrw)]\n");
+	printf("\t[-M rwmixread (100 for reads, 0 for writes)]\n");
+	printf("\t[-t time in seconds(should be larger than 15 seconds)]\n");
+	printf("\t[-m max completions per poll]\n");
+	printf("\t\t(default:0 - unlimited)\n");
+}
+
+static int
+print_stats(void)
+{
+	uint64_t io_completed, io_submitted, io_completed_error;
+	uint64_t total_completed_io, total_submitted_io, total_completed_err_io;
+	struct worker_thread	*worker;
+	struct ns_worker_ctx	*ns_ctx;
+
+	total_completed_io = 0;
+	total_submitted_io = 0;
+	total_completed_err_io = 0;
+
+	worker = g_workers;
+	ns_ctx = worker->ns_ctx;
+	while (ns_ctx) {
+		io_completed = ns_ctx->io_completed;
+		io_submitted = ns_ctx->io_submitted;
+		io_completed_error = ns_ctx->io_completed_error;
+		total_completed_io += io_completed;
+		total_submitted_io += io_submitted;
+		total_completed_err_io += io_completed_error;
+		ns_ctx = ns_ctx->next;
+	}
+
+	printf("========================================================\n");
+	printf("%16lu IO completed successfully\n", total_completed_io);
+	printf("%16lu IO completed with error\n", total_completed_err_io);
+	printf("--------------------------------------------------------\n");
+	printf("%16lu IO completed total\n", total_completed_io + total_completed_err_io);
+	printf("%16lu IO submitted\n", total_submitted_io);
+
+	if (total_submitted_io != (total_completed_io + total_completed_err_io)) {
+		fprintf(stderr, "Some IO are missing......\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
+parse_args(int argc, char **argv)
+{
+	const char *workload_type;
+	int op;
+	bool mix_specified = false;
+
+	/* default value */
+	g_queue_depth = 0;
+	g_io_size_bytes = 0;
+	workload_type = NULL;
+	g_time_in_sec = 0;
+	g_rw_percentage = -1;
+
+	while ((op = getopt(argc, argv, "m:q:s:t:w:M:")) != -1) {
+		switch (op) {
+		case 'q':
+			g_queue_depth = atoi(optarg);
+			break;
+		case 's':
+			g_io_size_bytes = atoi(optarg);
+			break;
+		case 't':
+			g_time_in_sec = atoi(optarg);
+			break;
+		case 'w':
+			workload_type = optarg;
+			break;
+		case 'M':
+			g_rw_percentage = atoi(optarg);
+			mix_specified = true;
+			break;
+		default:
+			usage(argv[0]);
+			return 1;
+		}
+	}
+
+	if (!g_queue_depth) {
+		usage(argv[0]);
+		return 1;
+	}
+	if (!g_io_size_bytes) {
+		usage(argv[0]);
+		return 1;
+	}
+	if (!workload_type) {
+		usage(argv[0]);
+		return 1;
+	}
+	if (!g_time_in_sec) {
+		usage(argv[0]);
+		return 1;
+	}
+
+	if (strcmp(workload_type, "read") &&
+	    strcmp(workload_type, "write") &&
+	    strcmp(workload_type, "randread") &&
+	    strcmp(workload_type, "randwrite") &&
+	    strcmp(workload_type, "rw") &&
+	    strcmp(workload_type, "randrw")) {
+		fprintf(stderr,
+			"io pattern type must be one of\n"
+			"(read, write, randread, randwrite, rw, randrw)\n");
+		return 1;
+	}
+
+	if (!strcmp(workload_type, "read") ||
+	    !strcmp(workload_type, "randread")) {
+		g_rw_percentage = 100;
+	}
+
+	if (!strcmp(workload_type, "write") ||
+	    !strcmp(workload_type, "randwrite")) {
+		g_rw_percentage = 0;
+	}
+
+	if (!strcmp(workload_type, "read") ||
+	    !strcmp(workload_type, "randread") ||
+	    !strcmp(workload_type, "write") ||
+	    !strcmp(workload_type, "randwrite")) {
+		if (mix_specified) {
+			fprintf(stderr, "Ignoring -M option... Please use -M option"
+				" only when using rw or randrw.\n");
+		}
+	}
+
+	if (!strcmp(workload_type, "rw") ||
+	    !strcmp(workload_type, "randrw")) {
+		if (g_rw_percentage < 0 || g_rw_percentage > 100) {
+			fprintf(stderr,
+				"-M must be specified to value from 0 to 100 "
+				"for rw or randrw.\n");
+			return 1;
+		}
+	}
+
+	if (!strcmp(workload_type, "read") ||
+	    !strcmp(workload_type, "write") ||
+	    !strcmp(workload_type, "rw")) {
+		g_is_random = 0;
+	} else {
+		g_is_random = 1;
+	}
+
+	return 0;
+}
+
+static int
+register_workers(void)
+{
+	struct worker_thread *worker;
+
+	worker = malloc(sizeof(struct worker_thread));
+	if (worker == NULL) {
+		perror("worker_thread malloc");
+		return -1;
+	}
+
+	memset(worker, 0, sizeof(struct worker_thread));
+	worker->lcore = spdk_env_get_current_core();
+
+	g_workers = worker;
+
+	return 0;
+}
+
+
+static bool
+probe_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
+	 struct spdk_nvme_ctrlr_opts *opts)
+{
+	return true;
+}
+
+static void
+attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
+	  struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
+{
+	register_ctrlr(ctrlr);
+}
+
+static int
+register_controllers(void)
+{
+	printf("Initializing NVMe Controllers\n");
+
+	if (spdk_nvme_probe(NULL, NULL, probe_cb, attach_cb, NULL) != 0) {
+		fprintf(stderr, "spdk_nvme_probe() failed\n");
+		return 1;
+	}
+
+	return 0;
+}
+
+static void
+unregister_controllers(void)
+{
+	struct ctrlr_entry *entry = g_controllers;
+
+	while (entry) {
+		struct ctrlr_entry *next = entry->next;
+		spdk_nvme_detach(entry->ctrlr);
+		free(entry);
+		entry = next;
+	}
+}
+
+static int
+associate_workers_with_ns(void)
+{
+	struct ns_entry		*entry = g_namespaces;
+	struct worker_thread	*worker = g_workers;
+	struct ns_worker_ctx	*ns_ctx;
+	int			i, count;
+
+	count = g_num_namespaces;
+
+	for (i = 0; i < count; i++) {
+		if (entry == NULL) {
+			break;
+		}
+		ns_ctx = malloc(sizeof(struct ns_worker_ctx));
+		if (!ns_ctx) {
+			return -1;
+		}
+		memset(ns_ctx, 0, sizeof(*ns_ctx));
+
+		printf("Associating %s with lcore %d\n", entry->name, worker->lcore);
+		ns_ctx->entry = entry;
+		ns_ctx->next = worker->ns_ctx;
+		worker->ns_ctx = ns_ctx;
+
+		worker = g_workers;
+
+		entry = entry->next;
+		if (entry == NULL) {
+			entry = g_namespaces;
+		}
+	}
+
+	return 0;
+}
+
+static int
+run_nvme_reset_cycle(int retry_count)
+{
+	struct worker_thread *worker;
+	struct ns_worker_ctx *ns_ctx;
+
+	spdk_nvme_retry_count = retry_count;
+
+	if (work_fn(g_workers) != 0) {
+		return -1;
+	}
+
+	if (print_stats() != 0) {
+		return -1;
+	}
+
+	worker = g_workers;
+	ns_ctx = worker->ns_ctx;
+	while (ns_ctx != NULL) {
+		ns_ctx->io_completed = 0;
+		ns_ctx->io_completed_error = 0;
+		ns_ctx->io_submitted = 0;
+		ns_ctx->is_draining = false;
+		ns_ctx = ns_ctx->next;
+	}
+
+	return 0;
+}
+
+static void
+spdk_reset_free_tasks(void)
+{
+	if (spdk_mempool_count(task_pool) != TASK_POOL_NUM) {
+		fprintf(stderr, "task_pool count is %zu but should be %d\n",
+			spdk_mempool_count(task_pool), TASK_POOL_NUM);
+	}
+	spdk_mempool_free(task_pool);
+}
+
+int main(int argc, char **argv)
+{
+	int			rc;
+	int			i;
+	struct spdk_env_opts	opts;
+
+
+	rc = parse_args(argc, argv);
+	if (rc != 0) {
+		return rc;
+	}
+
+	spdk_env_opts_init(&opts);
+	opts.name = "reset";
+	opts.core_mask = "0x1";
+	opts.shm_id = 0;
+	if (spdk_env_init(&opts) < 0) {
+		fprintf(stderr, "Unable to initialize SPDK env\n");
+		return 1;
+	}
+
+	if (register_controllers() != 0) {
+		return 1;
+	}
+
+	if (!g_controllers) {
+		printf("No NVMe controller found, %s exiting\n", argv[0]);
+		return 1;
+	}
+
+	task_pool = spdk_mempool_create("task_pool", TASK_POOL_NUM,
+					sizeof(struct reset_task),
+					64, SPDK_ENV_SOCKET_ID_ANY);
+	if (!task_pool) {
+		fprintf(stderr, "Cannot create task pool\n");
+		return 1;
+	}
+
+	g_tsc_rate = spdk_get_ticks_hz();
+
+	if (register_workers() != 0) {
+		return 1;
+	}
+
+	if (associate_workers_with_ns() != 0) {
+		rc = 1;
+		goto cleanup;
+	}
+
+	printf("Initialization complete. Launching workers.\n");
+
+	for (i = 2; i >= 0; i--) {
+		rc = run_nvme_reset_cycle(i);
+		if (rc != 0) {
+			goto cleanup;
+		}
+	}
+
+cleanup:
+	unregister_controllers();
+	spdk_reset_free_tasks();
+
+	if (rc != 0) {
+		fprintf(stderr, "%s: errors occured\n", argv[0]);
+	}
+
+	return rc;
+}