diff options
Diffstat (limited to 'src/spdk/examples/nvme/arbitration/arbitration.c')
| -rw-r--r-- | src/spdk/examples/nvme/arbitration/arbitration.c | 1167 |
1 files changed, 1167 insertions, 0 deletions
diff --git a/src/spdk/examples/nvme/arbitration/arbitration.c b/src/spdk/examples/nvme/arbitration/arbitration.c new file mode 100644 index 00000000..8065b1ba --- /dev/null +++ b/src/spdk/examples/nvme/arbitration/arbitration.c @@ -0,0 +1,1167 @@ +/*- + * 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" +#include "spdk/nvme_intel.h" + +struct ctrlr_entry { + struct spdk_nvme_ctrlr *ctrlr; + struct spdk_nvme_intel_rw_latency_page latency_page; + struct ctrlr_entry *next; + char name[1024]; +}; + +struct ns_entry { + struct { + struct spdk_nvme_ctrlr *ctrlr; + struct spdk_nvme_ns *ns; + } nvme; + + 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; + uint64_t io_completed; + uint64_t current_queue_depth; + uint64_t offset_in_ios; + bool is_draining; + struct spdk_nvme_qpair *qpair; + struct ns_worker_ctx *next; +}; + +struct arb_task { + struct ns_worker_ctx *ns_ctx; + void *buf; +}; + +struct worker_thread { + struct ns_worker_ctx *ns_ctx; + struct worker_thread *next; + unsigned lcore; + enum spdk_nvme_qprio qprio; +}; + +struct arb_context { + int shm_id; + int outstanding_commands; + int num_namespaces; + int num_workers; + int rw_percentage; + int is_random; + int queue_depth; + int time_in_sec; + int io_count; + uint8_t latency_tracking_enable; + uint8_t arbitration_mechanism; + uint8_t arbitration_config; + uint32_t io_size_bytes; + uint32_t max_completions; + uint64_t tsc_rate; + const char *core_mask; + const char *workload_type; +}; + +struct feature { + uint32_t result; + bool valid; +}; + +static struct spdk_mempool *task_pool = NULL; + +static struct ctrlr_entry *g_controllers = NULL; +static struct ns_entry *g_namespaces = NULL; +static struct worker_thread *g_workers = NULL; + +static struct feature features[256]; + +static struct arb_context g_arbitration = { + .shm_id = -1, + .outstanding_commands = 0, + .num_workers = 0, + .num_namespaces = 0, + .rw_percentage = 50, + .queue_depth = 64, + .time_in_sec = 60, + .io_count = 100000, + .latency_tracking_enable = 0, + .arbitration_mechanism = SPDK_NVME_CC_AMS_RR, + .arbitration_config = 0, + .io_size_bytes = 131072, + .max_completions = 0, + /* Default 4 cores for urgent/high/medium/low */ + .core_mask = "0xf", + .workload_type = "randrw", +}; + +/* + * For weighted round robin arbitration mechanism, the smaller value between + * weight and burst will be picked to execute the commands in one queue. + */ +#define USER_SPECIFIED_HIGH_PRIORITY_WEIGHT 32 +#define USER_SPECIFIED_MEDIUM_PRIORITY_WEIGHT 16 +#define USER_SPECIFIED_LOW_PRIORITY_WEIGHT 8 +#define USER_SPECIFIED_ARBITRATION_BURST 7 /* No limit */ + +/* + * Description of dword for priority weight and arbitration burst + * ------------------------------------------------------------------------------ + * 31 : 24 | 23 : 16 | 15 : 08 | 07 : 03 | 02 : 00 + * ------------------------------------------------------------------------------ + * High Prio Weight | Medium Prio Weight | Low Prio Weight | Reserved | Arb Burst + * ------------------------------------------------------------------------------ + * + * The priority weights are zero based value. + */ +#define SPDK_NVME_HIGH_PRIO_WEIGHT_SHIFT 24 +#define SPDK_NVME_MED_PRIO_WEIGHT_SHIFT 16 +#define SPDK_NVME_LOW_PRIO_WEIGHT_SHIFT 8 +#define SPDK_NVME_PRIO_WEIGHT_MASK 0xFF +#define SPDK_NVME_ARB_BURST_MASK 0x7 + +#define SPDK_NVME_QPRIO_MAX (SPDK_NVME_QPRIO_LOW + 1) + +static void task_complete(struct arb_task *task); + +static void io_complete(void *ctx, const struct spdk_nvme_cpl *completion); + +static void get_arb_feature(struct spdk_nvme_ctrlr *ctrlr); + +static int set_arb_feature(struct spdk_nvme_ctrlr *ctrlr); + +static const char *print_qprio(enum spdk_nvme_qprio); + + +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; + + cdata = spdk_nvme_ctrlr_get_data(ctrlr); + + if (!spdk_nvme_ns_is_active(ns)) { + printf("Controller %-20.20s (%-20.20s): Skipping inactive NS %u\n", + cdata->mn, cdata->sn, + spdk_nvme_ns_get_id(ns)); + return; + } + + if (spdk_nvme_ns_get_size(ns) < g_arbitration.io_size_bytes || + spdk_nvme_ns_get_sector_size(ns) > g_arbitration.io_size_bytes) { + printf("WARNING: controller %-20.20s (%-20.20s) ns %u has invalid " + "ns size %" PRIu64 " / block size %u for I/O size %u\n", + cdata->mn, cdata->sn, spdk_nvme_ns_get_id(ns), + spdk_nvme_ns_get_size(ns), spdk_nvme_ns_get_sector_size(ns), + g_arbitration.io_size_bytes); + return; + } + + entry = malloc(sizeof(struct ns_entry)); + if (entry == NULL) { + perror("ns_entry malloc"); + exit(1); + } + + entry->nvme.ctrlr = ctrlr; + entry->nvme.ns = ns; + + entry->size_in_ios = spdk_nvme_ns_get_size(ns) / g_arbitration.io_size_bytes; + entry->io_size_blocks = g_arbitration.io_size_bytes / spdk_nvme_ns_get_sector_size(ns); + + snprintf(entry->name, 44, "%-20.20s (%-20.20s)", cdata->mn, cdata->sn); + + g_arbitration.num_namespaces++; + entry->next = g_namespaces; + g_namespaces = entry; +} + +static void +enable_latency_tracking_complete(void *cb_arg, const struct spdk_nvme_cpl *cpl) +{ + if (spdk_nvme_cpl_is_error(cpl)) { + printf("enable_latency_tracking_complete failed\n"); + } + g_arbitration.outstanding_commands--; +} + +static void +set_latency_tracking_feature(struct spdk_nvme_ctrlr *ctrlr, bool enable) +{ + int res; + union spdk_nvme_intel_feat_latency_tracking latency_tracking; + + if (enable) { + latency_tracking.bits.enable = 0x01; + } else { + latency_tracking.bits.enable = 0x00; + } + + res = spdk_nvme_ctrlr_cmd_set_feature(ctrlr, SPDK_NVME_INTEL_FEAT_LATENCY_TRACKING, + latency_tracking.raw, 0, NULL, 0, enable_latency_tracking_complete, NULL); + if (res) { + printf("fail to allocate nvme request.\n"); + return; + } + g_arbitration.outstanding_commands++; + + while (g_arbitration.outstanding_commands) { + spdk_nvme_ctrlr_process_admin_completions(ctrlr); + } +} + +static void +register_ctrlr(struct spdk_nvme_ctrlr *ctrlr) +{ + int nsid, num_ns; + struct spdk_nvme_ns *ns; + struct ctrlr_entry *entry = calloc(1, sizeof(struct ctrlr_entry)); + const struct spdk_nvme_ctrlr_data *cdata = spdk_nvme_ctrlr_get_data(ctrlr); + + if (entry == NULL) { + perror("ctrlr_entry malloc"); + exit(1); + } + + snprintf(entry->name, sizeof(entry->name), "%-20.20s (%-20.20s)", cdata->mn, cdata->sn); + + entry->ctrlr = ctrlr; + entry->next = g_controllers; + g_controllers = entry; + + if ((g_arbitration.latency_tracking_enable != 0) && + spdk_nvme_ctrlr_is_feature_supported(ctrlr, SPDK_NVME_INTEL_FEAT_LATENCY_TRACKING)) { + set_latency_tracking_feature(ctrlr, true); + } + + 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); + } + + if (g_arbitration.arbitration_mechanism == SPDK_NVME_CAP_AMS_WRR) { + get_arb_feature(ctrlr); + + if (g_arbitration.arbitration_config != 0) { + set_arb_feature(ctrlr); + get_arb_feature(ctrlr); + } + } +} + +static __thread unsigned int seed = 0; + +static void +submit_single_io(struct ns_worker_ctx *ns_ctx) +{ + struct arb_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_arbitration.io_size_bytes, 0x200, NULL); + if (!task->buf) { + spdk_mempool_put(task_pool, task); + fprintf(stderr, "task->buf spdk_dma_zmalloc failed\n"); + exit(1); + } + + task->ns_ctx = ns_ctx; + + if (g_arbitration.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_arbitration.rw_percentage == 100) || + (g_arbitration.rw_percentage != 0 && + ((rand_r(&seed) % 100) < g_arbitration.rw_percentage))) { + rc = spdk_nvme_ns_cmd_read(entry->nvme.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->nvme.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 arb_task *task) +{ + struct ns_worker_ctx *ns_ctx; + + ns_ctx = task->ns_ctx; + ns_ctx->current_queue_depth--; + 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 arb_task *)ctx); +} + +static void +check_io(struct ns_worker_ctx *ns_ctx) +{ + spdk_nvme_qpair_process_completions(ns_ctx->qpair, g_arbitration.max_completions); +} + +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 +init_ns_worker_ctx(struct ns_worker_ctx *ns_ctx, enum spdk_nvme_qprio qprio) +{ + struct spdk_nvme_ctrlr *ctrlr = ns_ctx->entry->nvme.ctrlr; + struct spdk_nvme_io_qpair_opts opts; + + spdk_nvme_ctrlr_get_default_io_qpair_opts(ctrlr, &opts, sizeof(opts)); + opts.qprio = qprio; + + ns_ctx->qpair = spdk_nvme_ctrlr_alloc_io_qpair(ctrlr, &opts, sizeof(opts)); + if (!ns_ctx->qpair) { + printf("ERROR: spdk_nvme_ctrlr_alloc_io_qpair failed\n"); + return 1; + } + + return 0; +} + +static void +cleanup_ns_worker_ctx(struct ns_worker_ctx *ns_ctx) +{ + spdk_nvme_ctrlr_free_io_qpair(ns_ctx->qpair); +} + +static void +cleanup(uint32_t task_count) +{ + struct ns_entry *entry = g_namespaces; + struct ns_entry *next_entry = NULL; + struct worker_thread *worker = g_workers; + struct worker_thread *next_worker = NULL; + + while (entry) { + next_entry = entry->next; + free(entry); + entry = next_entry; + }; + + while (worker) { + next_worker = worker->next; + free(worker->ns_ctx); + free(worker); + worker = next_worker; + }; + + if (spdk_mempool_count(task_pool) != (size_t)task_count) { + fprintf(stderr, "task_pool count is %zu but should be %u\n", + spdk_mempool_count(task_pool), task_count); + } + spdk_mempool_free(task_pool); +} + +static int +work_fn(void *arg) +{ + uint64_t tsc_end; + struct worker_thread *worker = (struct worker_thread *)arg; + struct ns_worker_ctx *ns_ctx = NULL; + + printf("Starting thread on core %u with %s\n", worker->lcore, print_qprio(worker->qprio)); + + /* Allocate a queue pair for each namespace. */ + ns_ctx = worker->ns_ctx; + while (ns_ctx != NULL) { + if (init_ns_worker_ctx(ns_ctx, worker->qprio) != 0) { + printf("ERROR: init_ns_worker_ctx() failed\n"); + return 1; + } + ns_ctx = ns_ctx->next; + } + + tsc_end = spdk_get_ticks() + g_arbitration.time_in_sec * g_arbitration.tsc_rate; + + /* Submit initial I/O for each namespace. */ + ns_ctx = worker->ns_ctx; + + while (ns_ctx != NULL) { + submit_io(ns_ctx, g_arbitration.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 (spdk_get_ticks() > tsc_end) { + break; + } + } + + ns_ctx = worker->ns_ctx; + while (ns_ctx != NULL) { + drain_io(ns_ctx); + cleanup_ns_worker_ctx(ns_ctx); + 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[-l enable latency tracking, default: disabled]\n"); + printf("\t\t(0 - disabled; 1 - enabled)\n"); + printf("\t[-t time in seconds]\n"); + printf("\t[-c core mask for I/O submission/completion.]\n"); + printf("\t\t(default: 0xf - 4 cores)]\n"); + printf("\t[-m max completions per poll]\n"); + printf("\t\t(default: 0 - unlimited)\n"); + printf("\t[-a arbitration mechanism, must be one of below]\n"); + printf("\t\t(0, 1, 2)]\n"); + printf("\t\t(0: default round robin mechanism)]\n"); + printf("\t\t(1: weighted round robin mechanism)]\n"); + printf("\t\t(2: vendor specific mechanism)]\n"); + printf("\t[-b enable arbitration user configuration, default: disabled]\n"); + printf("\t\t(0 - disabled; 1 - enabled)\n"); + printf("\t[-n subjected IOs for performance comparison]\n"); + printf("\t[-i shared memory group ID]\n"); +} + +static const char * +print_qprio(enum spdk_nvme_qprio qprio) +{ + switch (qprio) { + case SPDK_NVME_QPRIO_URGENT: + return "urgent priority queue"; + case SPDK_NVME_QPRIO_HIGH: + return "high priority queue"; + case SPDK_NVME_QPRIO_MEDIUM: + return "medium priority queue"; + case SPDK_NVME_QPRIO_LOW: + return "low priority queue"; + default: + return "invalid priority queue"; + } +} + + +static void +print_configuration(char *program_name) +{ + printf("%s run with configuration:\n", program_name); + printf("%s -q %d -s %d -w %s -M %d -l %d -t %d -c %s -m %d -a %d -b %d -n %d -i %d\n", + program_name, + g_arbitration.queue_depth, + g_arbitration.io_size_bytes, + g_arbitration.workload_type, + g_arbitration.rw_percentage, + g_arbitration.latency_tracking_enable, + g_arbitration.time_in_sec, + g_arbitration.core_mask, + g_arbitration.max_completions, + g_arbitration.arbitration_mechanism, + g_arbitration.arbitration_config, + g_arbitration.io_count, + g_arbitration.shm_id); +} + + +static void +print_performance(void) +{ + float io_per_second, sent_all_io_in_secs; + struct worker_thread *worker; + struct ns_worker_ctx *ns_ctx; + + worker = g_workers; + while (worker) { + ns_ctx = worker->ns_ctx; + while (ns_ctx) { + io_per_second = (float)ns_ctx->io_completed / g_arbitration.time_in_sec; + sent_all_io_in_secs = g_arbitration.io_count / io_per_second; + printf("%-43.43s core %u: %8.2f IO/s %8.2f secs/%d ios\n", + ns_ctx->entry->name, worker->lcore, + io_per_second, sent_all_io_in_secs, g_arbitration.io_count); + ns_ctx = ns_ctx->next; + } + worker = worker->next; + } + printf("========================================================\n"); + + printf("\n"); +} + +static void +print_latency_page(struct ctrlr_entry *entry) +{ + int i; + + printf("\n"); + printf("%s\n", entry->name); + printf("--------------------------------------------------------\n"); + + for (i = 0; i < 32; i++) { + if (entry->latency_page.buckets_32us[i]) + printf("Bucket %dus - %dus: %d\n", i * 32, (i + 1) * 32, + entry->latency_page.buckets_32us[i]); + } + for (i = 0; i < 31; i++) { + if (entry->latency_page.buckets_1ms[i]) + printf("Bucket %dms - %dms: %d\n", i + 1, i + 2, + entry->latency_page.buckets_1ms[i]); + } + for (i = 0; i < 31; i++) { + if (entry->latency_page.buckets_32ms[i]) + printf("Bucket %dms - %dms: %d\n", (i + 1) * 32, (i + 2) * 32, + entry->latency_page.buckets_32ms[i]); + } +} + +static void +print_latency_statistics(const char *op_name, enum spdk_nvme_intel_log_page log_page) +{ + struct ctrlr_entry *ctrlr; + + printf("%s Latency Statistics:\n", op_name); + printf("========================================================\n"); + ctrlr = g_controllers; + while (ctrlr) { + if (spdk_nvme_ctrlr_is_log_page_supported(ctrlr->ctrlr, log_page)) { + if (spdk_nvme_ctrlr_cmd_get_log_page( + ctrlr->ctrlr, log_page, + SPDK_NVME_GLOBAL_NS_TAG, + &ctrlr->latency_page, + sizeof(struct spdk_nvme_intel_rw_latency_page), + 0, + enable_latency_tracking_complete, + NULL)) { + printf("nvme_ctrlr_cmd_get_log_page() failed\n"); + exit(1); + } + + g_arbitration.outstanding_commands++; + } else { + printf("Controller %s: %s latency statistics not supported\n", + ctrlr->name, op_name); + } + ctrlr = ctrlr->next; + } + + while (g_arbitration.outstanding_commands) { + ctrlr = g_controllers; + while (ctrlr) { + spdk_nvme_ctrlr_process_admin_completions(ctrlr->ctrlr); + ctrlr = ctrlr->next; + } + } + + ctrlr = g_controllers; + while (ctrlr) { + if (spdk_nvme_ctrlr_is_log_page_supported(ctrlr->ctrlr, log_page)) { + print_latency_page(ctrlr); + } + ctrlr = ctrlr->next; + } + printf("\n"); +} + +static void +print_stats(void) +{ + print_performance(); + if (g_arbitration.latency_tracking_enable) { + if (g_arbitration.rw_percentage != 0) { + print_latency_statistics("Read", SPDK_NVME_INTEL_LOG_READ_CMD_LATENCY); + } + if (g_arbitration.rw_percentage != 100) { + print_latency_statistics("Write", SPDK_NVME_INTEL_LOG_WRITE_CMD_LATENCY); + } + } +} + +static int +parse_args(int argc, char **argv) +{ + const char *workload_type = NULL; + int op = 0; + bool mix_specified = false; + + while ((op = getopt(argc, argv, "c:l:i:m:q:s:t:w:M:a:b:n:h")) != -1) { + switch (op) { + case 'c': + g_arbitration.core_mask = optarg; + break; + case 'i': + g_arbitration.shm_id = atoi(optarg); + break; + case 'l': + g_arbitration.latency_tracking_enable = atoi(optarg); + break; + case 'm': + g_arbitration.max_completions = atoi(optarg); + break; + case 'q': + g_arbitration.queue_depth = atoi(optarg); + break; + case 's': + g_arbitration.io_size_bytes = atoi(optarg); + break; + case 't': + g_arbitration.time_in_sec = atoi(optarg); + break; + case 'w': + g_arbitration.workload_type = optarg; + break; + case 'M': + g_arbitration.rw_percentage = atoi(optarg); + mix_specified = true; + break; + case 'a': + g_arbitration.arbitration_mechanism = atoi(optarg); + break; + case 'b': + g_arbitration.arbitration_config = atoi(optarg); + break; + case 'n': + g_arbitration.io_count = atoi(optarg); + break; + case 'h': + default: + usage(argv[0]); + return 1; + } + } + + workload_type = g_arbitration.workload_type; + + 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_arbitration.rw_percentage = 100; + } + + if (!strcmp(workload_type, "write") || + !strcmp(workload_type, "randwrite")) { + g_arbitration.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_arbitration.rw_percentage < 0 || g_arbitration.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_arbitration.is_random = 0; + } else { + g_arbitration.is_random = 1; + } + + if (g_arbitration.latency_tracking_enable != 0 && + g_arbitration.latency_tracking_enable != 1) { + fprintf(stderr, + "-l must be specified to value 0 or 1.\n"); + return 1; + } + + switch (g_arbitration.arbitration_mechanism) { + case SPDK_NVME_CC_AMS_RR: + case SPDK_NVME_CC_AMS_WRR: + case SPDK_NVME_CC_AMS_VS: + break; + default: + fprintf(stderr, + "-a must be specified to value 0, 1, or 7.\n"); + return 1; + } + + if (g_arbitration.arbitration_config != 0 && + g_arbitration.arbitration_config != 1) { + fprintf(stderr, + "-b must be specified to value 0 or 1.\n"); + return 1; + } else if (g_arbitration.arbitration_config == 1 && + g_arbitration.arbitration_mechanism != SPDK_NVME_CC_AMS_WRR) { + fprintf(stderr, + "-a must be specified to 1 (WRR) together.\n"); + return 1; + } + + return 0; +} + +static int +register_workers(void) +{ + uint32_t i; + struct worker_thread *worker; + enum spdk_nvme_qprio qprio = SPDK_NVME_QPRIO_URGENT; + + g_workers = NULL; + g_arbitration.num_workers = 0; + + SPDK_ENV_FOREACH_CORE(i) { + worker = calloc(1, sizeof(*worker)); + if (worker == NULL) { + fprintf(stderr, "Unable to allocate worker\n"); + return -1; + } + + worker->lcore = i; + worker->next = g_workers; + g_workers = worker; + g_arbitration.num_workers++; + + if (g_arbitration.arbitration_mechanism == SPDK_NVME_CAP_AMS_WRR) { + qprio++; + } + + worker->qprio = qprio % SPDK_NVME_QPRIO_MAX; + } + + return 0; +} + +static bool +probe_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid, + struct spdk_nvme_ctrlr_opts *opts) +{ + /* Update with user specified arbitration configuration */ + opts->arb_mechanism = g_arbitration.arbitration_mechanism; + + printf("Attaching to %s\n", trid->traddr); + + 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) +{ + printf("Attached to %s\n", trid->traddr); + + /* Update with actual arbitration configuration in use */ + g_arbitration.arbitration_mechanism = opts->arb_mechanism; + + 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; + } + + if (g_arbitration.num_namespaces == 0) { + fprintf(stderr, "No valid namespaces to continue IO testing\n"); + return 1; + } + + return 0; +} + +static void +unregister_controllers(void) +{ + struct ctrlr_entry *entry = g_controllers; + + while (entry) { + struct ctrlr_entry *next = entry->next; + if (g_arbitration.latency_tracking_enable && + spdk_nvme_ctrlr_is_feature_supported(entry->ctrlr, SPDK_NVME_INTEL_FEAT_LATENCY_TRACKING)) { + set_latency_tracking_feature(entry->ctrlr, false); + } + 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_arbitration.num_namespaces > g_arbitration.num_workers ? + g_arbitration.num_namespaces : g_arbitration.num_workers; + + 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 = worker->next; + if (worker == NULL) { + worker = g_workers; + } + + entry = entry->next; + if (entry == NULL) { + entry = g_namespaces; + } + + } + + return 0; +} + +static void +get_feature_completion(void *cb_arg, const struct spdk_nvme_cpl *cpl) +{ + struct feature *feature = cb_arg; + int fid = feature - features; + + if (spdk_nvme_cpl_is_error(cpl)) { + printf("get_feature(0x%02X) failed\n", fid); + } else { + feature->result = cpl->cdw0; + feature->valid = true; + } + + g_arbitration.outstanding_commands--; +} + +static int +get_feature(struct spdk_nvme_ctrlr *ctrlr, uint8_t fid) +{ + struct spdk_nvme_cmd cmd = {}; + + cmd.opc = SPDK_NVME_OPC_GET_FEATURES; + cmd.cdw10 = fid; + + return spdk_nvme_ctrlr_cmd_admin_raw(ctrlr, &cmd, NULL, 0, get_feature_completion, &features[fid]); +} + +static void +get_arb_feature(struct spdk_nvme_ctrlr *ctrlr) +{ + get_feature(ctrlr, SPDK_NVME_FEAT_ARBITRATION); + + g_arbitration.outstanding_commands++; + + while (g_arbitration.outstanding_commands) { + spdk_nvme_ctrlr_process_admin_completions(ctrlr); + } + + if (features[SPDK_NVME_FEAT_ARBITRATION].valid) { + uint32_t arb = features[SPDK_NVME_FEAT_ARBITRATION].result; + unsigned ab, lpw, mpw, hpw; + + ab = arb & SPDK_NVME_ARB_BURST_MASK; + lpw = ((arb >> SPDK_NVME_LOW_PRIO_WEIGHT_SHIFT) & SPDK_NVME_PRIO_WEIGHT_MASK) + 1; + mpw = ((arb >> SPDK_NVME_MED_PRIO_WEIGHT_SHIFT) & SPDK_NVME_PRIO_WEIGHT_MASK) + 1; + hpw = ((arb >> SPDK_NVME_HIGH_PRIO_WEIGHT_SHIFT) & SPDK_NVME_PRIO_WEIGHT_MASK) + 1; + + printf("Current Arbitration Configuration\n"); + printf("===========\n"); + printf("Arbitration Burst: "); + if (ab == SPDK_NVME_ARB_BURST_MASK) { + printf("no limit\n"); + } else { + printf("%u\n", 1u << ab); + } + + printf("Low Priority Weight: %u\n", lpw); + printf("Medium Priority Weight: %u\n", mpw); + printf("High Priority Weight: %u\n", hpw); + printf("\n"); + } +} + +static void +set_feature_completion(void *cb_arg, const struct spdk_nvme_cpl *cpl) +{ + struct feature *feature = cb_arg; + int fid = feature - features; + + if (spdk_nvme_cpl_is_error(cpl)) { + printf("set_feature(0x%02X) failed\n", fid); + feature->valid = false; + } else { + printf("Set Arbitration Feature Successfully\n"); + } + + g_arbitration.outstanding_commands--; +} + +static int +set_arb_feature(struct spdk_nvme_ctrlr *ctrlr) +{ + int ret; + struct spdk_nvme_cmd cmd = {}; + uint32_t arb = 0; + unsigned ab, lpw, mpw, hpw; + + cmd.opc = SPDK_NVME_OPC_SET_FEATURES; + cmd.cdw10 = SPDK_NVME_FEAT_ARBITRATION; + + g_arbitration.outstanding_commands = 0; + + if (features[SPDK_NVME_FEAT_ARBITRATION].valid) { + ab = USER_SPECIFIED_ARBITRATION_BURST & SPDK_NVME_ARB_BURST_MASK; + hpw = USER_SPECIFIED_HIGH_PRIORITY_WEIGHT << SPDK_NVME_HIGH_PRIO_WEIGHT_SHIFT; + mpw = USER_SPECIFIED_MEDIUM_PRIORITY_WEIGHT << SPDK_NVME_MED_PRIO_WEIGHT_SHIFT; + lpw = USER_SPECIFIED_LOW_PRIORITY_WEIGHT << SPDK_NVME_LOW_PRIO_WEIGHT_SHIFT; + arb = hpw | mpw | lpw | ab; + cmd.cdw11 = arb; + } + + ret = spdk_nvme_ctrlr_cmd_admin_raw(ctrlr, &cmd, NULL, 0, + set_feature_completion, &features[SPDK_NVME_FEAT_ARBITRATION]); + if (ret) { + printf("Set Arbitration Feature: Failed 0x%x\n", ret); + return 1; + } + + g_arbitration.outstanding_commands++; + + while (g_arbitration.outstanding_commands) { + spdk_nvme_ctrlr_process_admin_completions(ctrlr); + } + + if (!features[SPDK_NVME_FEAT_ARBITRATION].valid) { + printf("Set Arbitration Feature failed and use default configuration\n"); + } + + return 0; +} + +int +main(int argc, char **argv) +{ + int rc; + struct worker_thread *worker, *master_worker; + unsigned master_core; + char task_pool_name[30]; + uint32_t task_count; + struct spdk_env_opts opts; + + rc = parse_args(argc, argv); + if (rc != 0) { + return rc; + } + + spdk_env_opts_init(&opts); + opts.name = "arb"; + opts.core_mask = g_arbitration.core_mask; + opts.shm_id = g_arbitration.shm_id; + if (spdk_env_init(&opts) < 0) { + return 1; + } + + g_arbitration.tsc_rate = spdk_get_ticks_hz(); + + if (register_workers() != 0) { + return 1; + } + + if (register_controllers() != 0) { + return 1; + } + + if (associate_workers_with_ns() != 0) { + return 1; + } + + snprintf(task_pool_name, sizeof(task_pool_name), "task_pool_%d", getpid()); + + /* + * The task_count will be dynamically calculated based on the + * number of attached active namespaces, queue depth and number + * of cores (workers) involved in the IO perations. + */ + task_count = g_arbitration.num_namespaces > g_arbitration.num_workers ? + g_arbitration.num_namespaces : g_arbitration.num_workers; + task_count *= g_arbitration.queue_depth; + + task_pool = spdk_mempool_create(task_pool_name, task_count, + sizeof(struct arb_task), 0, SPDK_ENV_SOCKET_ID_ANY); + if (task_pool == NULL) { + fprintf(stderr, "could not initialize task pool\n"); + return 1; + } + + print_configuration(argv[0]); + + printf("Initialization complete. Launching workers.\n"); + + /* Launch all of the slave workers */ + master_core = spdk_env_get_current_core(); + master_worker = NULL; + worker = g_workers; + while (worker != NULL) { + if (worker->lcore != master_core) { + spdk_env_thread_launch_pinned(worker->lcore, work_fn, worker); + } else { + assert(master_worker == NULL); + master_worker = worker; + } + worker = worker->next; + } + + assert(master_worker != NULL); + rc = work_fn(master_worker); + + spdk_env_thread_wait_all(); + + print_stats(); + + unregister_controllers(); + + cleanup(task_count); + + if (rc != 0) { + fprintf(stderr, "%s: errors occured\n", argv[0]); + } + + return rc; +} |