4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5 * Copyright(c) 2014 6WIND S.A.
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50 #include <sys/queue.h>
52 #include <rte_common.h>
53 #include <rte_debug.h>
54 #include <rte_memory.h>
55 #include <rte_memzone.h>
56 #include <rte_launch.h>
58 #include <rte_eal_memconfig.h>
59 #include <rte_per_lcore.h>
60 #include <rte_lcore.h>
62 #include <rte_random.h>
63 #include <rte_cycles.h>
64 #include <rte_string_fns.h>
65 #include <rte_cpuflags.h>
66 #include <rte_interrupts.h>
69 #include <rte_devargs.h>
70 #include <rte_common.h>
71 #include <rte_version.h>
72 #include <rte_atomic.h>
73 #include <malloc_heap.h>
75 #include "eal_private.h"
76 #include "eal_thread.h"
77 #include "eal_internal_cfg.h"
78 #include "eal_filesystem.h"
79 #include "eal_hugepages.h"
80 #include "eal_options.h"
82 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
84 /* Allow the application to print its usage message too if set */
85 static rte_usage_hook_t rte_application_usage_hook = NULL;
86 /* early configuration structure, when memory config is not mmapped */
87 static struct rte_mem_config early_mem_config;
89 /* define fd variable here, because file needs to be kept open for the
90 * duration of the program, as we hold a write lock on it in the primary proc */
91 static int mem_cfg_fd = -1;
93 static struct flock wr_lock = {
96 .l_start = offsetof(struct rte_mem_config, memseg),
97 .l_len = sizeof(early_mem_config.memseg),
100 /* Address of global and public configuration */
101 static struct rte_config rte_config = {
102 .mem_config = &early_mem_config,
105 /* internal configuration (per-core) */
106 struct lcore_config lcore_config[RTE_MAX_LCORE];
108 /* internal configuration */
109 struct internal_config internal_config;
111 /* used by rte_rdtsc() */
112 int rte_cycles_vmware_tsc_map;
114 /* Return a pointer to the configuration structure */
116 rte_eal_get_configuration(void)
121 /* parse a sysfs (or other) file containing one integer value */
123 eal_parse_sysfs_value(const char *filename, unsigned long *val)
129 if ((f = fopen(filename, "r")) == NULL) {
130 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
135 if (fgets(buf, sizeof(buf), f) == NULL) {
136 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
141 *val = strtoul(buf, &end, 0);
142 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
143 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
153 /* create memory configuration in shared/mmap memory. Take out
154 * a write lock on the memsegs, so we can auto-detect primary/secondary.
155 * This means we never close the file while running (auto-close on exit).
156 * We also don't lock the whole file, so that in future we can use read-locks
157 * on other parts, e.g. memzones, to detect if there are running secondary
160 rte_eal_config_create(void)
162 void *rte_mem_cfg_addr;
165 const char *pathname = eal_runtime_config_path();
167 if (internal_config.no_shconf)
171 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
173 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
176 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
179 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
182 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
185 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
186 "process running?\n", pathname);
189 rte_mem_cfg_addr = mmap(NULL, sizeof(*rte_config.mem_config),
190 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
192 if (rte_mem_cfg_addr == MAP_FAILED){
193 rte_panic("Cannot mmap memory for rte_config\n");
195 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
196 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
199 /* attach to an existing shared memory config */
201 rte_eal_config_attach(void)
203 void *rte_mem_cfg_addr;
204 const char *pathname = eal_runtime_config_path();
206 if (internal_config.no_shconf)
210 mem_cfg_fd = open(pathname, O_RDWR);
212 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
215 rte_mem_cfg_addr = mmap(NULL, sizeof(*rte_config.mem_config),
216 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
218 if (rte_mem_cfg_addr == MAP_FAILED)
219 rte_panic("Cannot mmap memory for rte_config\n");
221 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
224 /* Detect if we are a primary or a secondary process */
226 eal_proc_type_detect(void)
228 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
229 const char *pathname = eal_runtime_config_path();
231 /* if we can open the file but not get a write-lock we are a secondary
232 * process. NOTE: if we get a file handle back, we keep that open
233 * and don't close it to prevent a race condition between multiple opens */
234 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
235 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
236 ptype = RTE_PROC_SECONDARY;
238 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
239 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
244 /* Sets up rte_config structure with the pointer to shared memory config.*/
246 rte_config_init(void)
248 rte_config.process_type = internal_config.process_type;
250 switch (rte_config.process_type){
251 case RTE_PROC_PRIMARY:
252 rte_eal_config_create();
254 case RTE_PROC_SECONDARY:
255 rte_eal_config_attach();
256 rte_eal_mcfg_wait_complete(rte_config.mem_config);
259 case RTE_PROC_INVALID:
260 rte_panic("Invalid process type\n");
266 eal_usage(const char *prgname)
268 printf("\nUsage: %s ", prgname);
270 /* Allow the application to print its usage message too if hook is set */
271 if ( rte_application_usage_hook ) {
272 printf("===== Application Usage =====\n\n");
273 rte_application_usage_hook(prgname);
277 /* Set a per-application usage message */
279 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
281 rte_usage_hook_t old_func;
283 /* Will be NULL on the first call to denote the last usage routine. */
284 old_func = rte_application_usage_hook;
285 rte_application_usage_hook = usage_func;
291 eal_get_hugepage_mem_size(void)
296 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
297 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
298 if (hpi->hugedir != NULL) {
299 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
300 size += hpi->hugepage_sz * hpi->num_pages[j];
305 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
308 /* Parse the arguments for --log-level only */
310 eal_log_level_parse(int argc, char **argv)
315 const int old_optind = optind;
316 const int old_optopt = optopt;
317 const int old_optreset = optreset;
318 char * const old_optarg = optarg;
324 eal_reset_internal_config(&internal_config);
326 while ((opt = getopt_long(argc, argvopt, eal_short_options,
327 eal_long_options, &option_index)) != EOF) {
331 /* getopt is not happy, stop right now */
335 ret = (opt == OPT_LOG_LEVEL_NUM) ?
336 eal_parse_common_option(opt, optarg, &internal_config) : 0;
338 /* common parser is not happy */
343 /* restore getopt lib */
346 optreset = old_optreset;
350 /* Parse the argument given in the command line of the application */
352 eal_parse_args(int argc, char **argv)
357 char *prgname = argv[0];
358 const int old_optind = optind;
359 const int old_optopt = optopt;
360 const int old_optreset = optreset;
361 char * const old_optarg = optarg;
367 while ((opt = getopt_long(argc, argvopt, eal_short_options,
368 eal_long_options, &option_index)) != EOF) {
370 /* getopt is not happy, stop right now */
377 ret = eal_parse_common_option(opt, optarg, &internal_config);
378 /* common parser is not happy */
384 /* common parser handled this option */
393 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
394 RTE_LOG(ERR, EAL, "Option %c is not supported "
395 "on FreeBSD\n", opt);
396 } else if (opt >= OPT_LONG_MIN_NUM &&
397 opt < OPT_LONG_MAX_NUM) {
398 RTE_LOG(ERR, EAL, "Option %s is not supported "
400 eal_long_options[option_index].name);
402 RTE_LOG(ERR, EAL, "Option %d is not supported "
403 "on FreeBSD\n", opt);
411 if (eal_adjust_config(&internal_config) != 0) {
417 if (eal_check_common_options(&internal_config) != 0) {
424 argv[optind-1] = prgname;
428 /* restore getopt lib */
431 optreset = old_optreset;
438 eal_check_mem_on_local_socket(void)
440 const struct rte_memseg *ms;
443 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
445 ms = rte_eal_get_physmem_layout();
447 for (i = 0; i < RTE_MAX_MEMSEG; i++)
448 if (ms[i].socket_id == socket_id &&
452 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
453 "memory on local socket!\n");
457 sync_func(__attribute__((unused)) void *arg)
463 rte_eal_mcfg_complete(void)
465 /* ALL shared mem_config related INIT DONE */
466 if (rte_config.process_type == RTE_PROC_PRIMARY)
467 rte_config.mem_config->magic = RTE_MAGIC;
470 /* return non-zero if hugepages are enabled. */
471 int rte_eal_has_hugepages(void)
473 return !internal_config.no_hugetlbfs;
476 /* Abstraction for port I/0 privilege */
478 rte_eal_iopl_init(void)
482 fd = open("/dev/io", O_RDWR);
485 /* keep fd open for iopl */
489 /* Launch threads, called at application init(). */
491 rte_eal_init(int argc, char **argv)
495 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
496 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
497 char thread_name[RTE_MAX_THREAD_NAME_LEN];
499 /* checks if the machine is adequate */
500 rte_cpu_check_supported();
502 if (!rte_atomic32_test_and_set(&run_once))
505 thread_id = pthread_self();
507 eal_log_level_parse(argc, argv);
509 /* set log level as early as possible */
510 rte_set_log_level(internal_config.log_level);
512 if (rte_eal_cpu_init() < 0)
513 rte_panic("Cannot detect lcores\n");
515 fctret = eal_parse_args(argc, argv);
519 if (internal_config.no_hugetlbfs == 0 &&
520 internal_config.process_type != RTE_PROC_SECONDARY &&
521 eal_hugepage_info_init() < 0)
522 rte_panic("Cannot get hugepage information\n");
524 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
525 if (internal_config.no_hugetlbfs)
526 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
528 internal_config.memory = eal_get_hugepage_mem_size();
531 if (internal_config.vmware_tsc_map == 1) {
532 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
533 rte_cycles_vmware_tsc_map = 1;
534 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
535 "you must have monitor_control.pseudo_perfctr = TRUE\n");
537 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
538 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
542 rte_srand(rte_rdtsc());
546 if (rte_eal_memory_init() < 0)
547 rte_panic("Cannot init memory\n");
549 if (rte_eal_memzone_init() < 0)
550 rte_panic("Cannot init memzone\n");
552 if (rte_eal_tailqs_init() < 0)
553 rte_panic("Cannot init tail queues for objects\n");
555 if (rte_eal_alarm_init() < 0)
556 rte_panic("Cannot init interrupt-handling thread\n");
558 if (rte_eal_intr_init() < 0)
559 rte_panic("Cannot init interrupt-handling thread\n");
561 if (rte_eal_timer_init() < 0)
562 rte_panic("Cannot init HPET or TSC timers\n");
564 if (rte_eal_pci_init() < 0)
565 rte_panic("Cannot init PCI\n");
567 eal_check_mem_on_local_socket();
569 if (eal_plugins_init() < 0)
570 rte_panic("Cannot init plugins\n");
572 eal_thread_init_master(rte_config.master_lcore);
574 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
576 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%p;cpuset=[%s%s])\n",
577 rte_config.master_lcore, thread_id, cpuset,
578 ret == 0 ? "" : "...");
581 rte_panic("Cannot scan the buses for devices\n");
583 RTE_LCORE_FOREACH_SLAVE(i) {
586 * create communication pipes between master thread
589 if (pipe(lcore_config[i].pipe_master2slave) < 0)
590 rte_panic("Cannot create pipe\n");
591 if (pipe(lcore_config[i].pipe_slave2master) < 0)
592 rte_panic("Cannot create pipe\n");
594 lcore_config[i].state = WAIT;
596 /* create a thread for each lcore */
597 ret = pthread_create(&lcore_config[i].thread_id, NULL,
598 eal_thread_loop, NULL);
600 rte_panic("Cannot create thread\n");
602 /* Set thread_name for aid in debugging. */
603 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
604 "lcore-slave-%d", i);
605 rte_thread_setname(lcore_config[i].thread_id, thread_name);
609 * Launch a dummy function on all slave lcores, so that master lcore
610 * knows they are all ready when this function returns.
612 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
613 rte_eal_mp_wait_lcore();
615 /* Probe all the buses and devices/drivers on them */
617 rte_panic("Cannot probe devices\n");
619 /* Probe & Initialize PCI devices */
620 if (rte_eal_pci_probe())
621 rte_panic("Cannot probe PCI\n");
623 if (rte_eal_dev_init() < 0)
624 rte_panic("Cannot init pmd devices\n");
626 rte_eal_mcfg_complete();
632 enum rte_lcore_role_t
633 rte_eal_lcore_role(unsigned lcore_id)
635 return rte_config.lcore_role[lcore_id];
639 rte_eal_process_type(void)
641 return rte_config.process_type;