1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation.
3 * Copyright(c) 2012-2014 6WIND S.A.
21 #include <sys/queue.h>
23 #if defined(RTE_ARCH_X86)
27 #include <rte_compat.h>
28 #include <rte_common.h>
29 #include <rte_debug.h>
30 #include <rte_memory.h>
31 #include <rte_launch.h>
33 #include <rte_eal_memconfig.h>
34 #include <rte_errno.h>
35 #include <rte_per_lcore.h>
36 #include <rte_lcore.h>
37 #include <rte_service_component.h>
39 #include <rte_random.h>
40 #include <rte_cycles.h>
41 #include <rte_string_fns.h>
42 #include <rte_cpuflags.h>
43 #include <rte_interrupts.h>
46 #include <rte_devargs.h>
47 #include <rte_version.h>
48 #include <rte_atomic.h>
49 #include <malloc_heap.h>
52 #include "eal_private.h"
53 #include "eal_thread.h"
54 #include "eal_internal_cfg.h"
55 #include "eal_filesystem.h"
56 #include "eal_hugepages.h"
57 #include "eal_options.h"
60 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
62 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
64 /* Allow the application to print its usage message too if set */
65 static rte_usage_hook_t rte_application_usage_hook = NULL;
67 /* early configuration structure, when memory config is not mmapped */
68 static struct rte_mem_config early_mem_config;
70 /* define fd variable here, because file needs to be kept open for the
71 * duration of the program, as we hold a write lock on it in the primary proc */
72 static int mem_cfg_fd = -1;
74 static struct flock wr_lock = {
77 .l_start = offsetof(struct rte_mem_config, memsegs),
78 .l_len = sizeof(early_mem_config.memsegs),
81 /* Address of global and public configuration */
82 static struct rte_config rte_config = {
83 .mem_config = &early_mem_config,
86 /* internal configuration (per-core) */
87 struct lcore_config lcore_config[RTE_MAX_LCORE];
89 /* internal configuration */
90 struct internal_config internal_config;
92 /* used by rte_rdtsc() */
93 int rte_cycles_vmware_tsc_map;
95 /* platform-specific runtime dir */
96 static char runtime_dir[PATH_MAX];
98 static const char *default_runtime_dir = "/var/run";
101 eal_create_runtime_dir(void)
103 const char *directory = default_runtime_dir;
104 const char *xdg_runtime_dir = getenv("XDG_RUNTIME_DIR");
105 const char *fallback = "/tmp";
110 /* try XDG path first, fall back to /tmp */
111 if (xdg_runtime_dir != NULL)
112 directory = xdg_runtime_dir;
114 directory = fallback;
116 /* create DPDK subdirectory under runtime dir */
117 ret = snprintf(tmp, sizeof(tmp), "%s/dpdk", directory);
118 if (ret < 0 || ret == sizeof(tmp)) {
119 RTE_LOG(ERR, EAL, "Error creating DPDK runtime path name\n");
123 /* create prefix-specific subdirectory under DPDK runtime dir */
124 ret = snprintf(runtime_dir, sizeof(runtime_dir), "%s/%s",
125 tmp, internal_config.hugefile_prefix);
126 if (ret < 0 || ret == sizeof(runtime_dir)) {
127 RTE_LOG(ERR, EAL, "Error creating prefix-specific runtime path name\n");
131 /* create the path if it doesn't exist. no "mkdir -p" here, so do it
134 ret = mkdir(tmp, 0700);
135 if (ret < 0 && errno != EEXIST) {
136 RTE_LOG(ERR, EAL, "Error creating '%s': %s\n",
137 tmp, strerror(errno));
141 ret = mkdir(runtime_dir, 0700);
142 if (ret < 0 && errno != EEXIST) {
143 RTE_LOG(ERR, EAL, "Error creating '%s': %s\n",
144 runtime_dir, strerror(errno));
152 eal_get_runtime_dir(void)
157 /* Return user provided mbuf pool ops name */
158 const char * __rte_experimental
159 rte_eal_mbuf_user_pool_ops(void)
161 return internal_config.user_mbuf_pool_ops_name;
164 /* Return mbuf pool ops name */
166 rte_eal_mbuf_default_mempool_ops(void)
168 if (internal_config.user_mbuf_pool_ops_name == NULL)
169 return RTE_MBUF_DEFAULT_MEMPOOL_OPS;
171 return internal_config.user_mbuf_pool_ops_name;
174 /* Return a pointer to the configuration structure */
176 rte_eal_get_configuration(void)
182 rte_eal_iova_mode(void)
184 return rte_eal_get_configuration()->iova_mode;
187 /* parse a sysfs (or other) file containing one integer value */
189 eal_parse_sysfs_value(const char *filename, unsigned long *val)
195 if ((f = fopen(filename, "r")) == NULL) {
196 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
201 if (fgets(buf, sizeof(buf), f) == NULL) {
202 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
207 *val = strtoul(buf, &end, 0);
208 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
209 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
219 /* create memory configuration in shared/mmap memory. Take out
220 * a write lock on the memsegs, so we can auto-detect primary/secondary.
221 * This means we never close the file while running (auto-close on exit).
222 * We also don't lock the whole file, so that in future we can use read-locks
223 * on other parts, e.g. memzones, to detect if there are running secondary
226 rte_eal_config_create(void)
228 void *rte_mem_cfg_addr;
231 const char *pathname = eal_runtime_config_path();
233 if (internal_config.no_shconf)
236 /* map the config before hugepage address so that we don't waste a page */
237 if (internal_config.base_virtaddr != 0)
238 rte_mem_cfg_addr = (void *)
239 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
240 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
242 rte_mem_cfg_addr = NULL;
245 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
247 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
250 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
253 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
256 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
259 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
260 "process running?\n", pathname);
263 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
264 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
266 if (rte_mem_cfg_addr == MAP_FAILED){
267 rte_panic("Cannot mmap memory for rte_config\n");
269 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
270 rte_config.mem_config = rte_mem_cfg_addr;
272 /* store address of the config in the config itself so that secondary
273 * processes could later map the config into this exact location */
274 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
278 /* attach to an existing shared memory config */
280 rte_eal_config_attach(void)
282 struct rte_mem_config *mem_config;
284 const char *pathname = eal_runtime_config_path();
286 if (internal_config.no_shconf)
290 mem_cfg_fd = open(pathname, O_RDWR);
292 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
295 /* map it as read-only first */
296 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
297 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
298 if (mem_config == MAP_FAILED)
299 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
300 errno, strerror(errno));
302 rte_config.mem_config = mem_config;
305 /* reattach the shared config at exact memory location primary process has it */
307 rte_eal_config_reattach(void)
309 struct rte_mem_config *mem_config;
310 void *rte_mem_cfg_addr;
312 if (internal_config.no_shconf)
315 /* save the address primary process has mapped shared config to */
316 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
318 /* unmap original config */
319 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
321 /* remap the config at proper address */
322 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
323 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
325 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
326 if (mem_config != MAP_FAILED)
327 /* errno is stale, don't use */
328 rte_panic("Cannot mmap memory for rte_config at [%p], got [%p]"
329 " - please use '--base-virtaddr' option\n",
330 rte_mem_cfg_addr, mem_config);
332 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
333 errno, strerror(errno));
337 rte_config.mem_config = mem_config;
340 /* Detect if we are a primary or a secondary process */
342 eal_proc_type_detect(void)
344 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
345 const char *pathname = eal_runtime_config_path();
347 /* if we can open the file but not get a write-lock we are a secondary
348 * process. NOTE: if we get a file handle back, we keep that open
349 * and don't close it to prevent a race condition between multiple opens */
350 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
351 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
352 ptype = RTE_PROC_SECONDARY;
354 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
355 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
360 /* Sets up rte_config structure with the pointer to shared memory config.*/
362 rte_config_init(void)
364 rte_config.process_type = internal_config.process_type;
366 switch (rte_config.process_type){
367 case RTE_PROC_PRIMARY:
368 rte_eal_config_create();
370 case RTE_PROC_SECONDARY:
371 rte_eal_config_attach();
372 rte_eal_mcfg_wait_complete(rte_config.mem_config);
373 rte_eal_config_reattach();
376 case RTE_PROC_INVALID:
377 rte_panic("Invalid process type\n");
381 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
383 eal_hugedirs_unlock(void)
387 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
389 /* skip uninitialized */
390 if (internal_config.hugepage_info[i].lock_descriptor < 0)
392 /* unlock hugepage file */
393 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
394 close(internal_config.hugepage_info[i].lock_descriptor);
395 /* reset the field */
396 internal_config.hugepage_info[i].lock_descriptor = -1;
402 eal_usage(const char *prgname)
404 printf("\nUsage: %s ", prgname);
406 printf("EAL Linux options:\n"
407 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
408 " --"OPT_SOCKET_LIMIT" Limit memory allocation on sockets (comma separated values)\n"
409 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
410 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
411 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
412 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
413 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
414 " --"OPT_LEGACY_MEM" Legacy memory mode (no dynamic allocation, contiguous segments)\n"
415 " --"OPT_SINGLE_FILE_SEGMENTS" Put all hugepage memory in single files\n"
417 /* Allow the application to print its usage message too if hook is set */
418 if ( rte_application_usage_hook ) {
419 printf("===== Application Usage =====\n\n");
420 rte_application_usage_hook(prgname);
424 /* Set a per-application usage message */
426 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
428 rte_usage_hook_t old_func;
430 /* Will be NULL on the first call to denote the last usage routine. */
431 old_func = rte_application_usage_hook;
432 rte_application_usage_hook = usage_func;
438 eal_parse_socket_arg(char *strval, volatile uint64_t *socket_arg)
440 char * arg[RTE_MAX_NUMA_NODES];
443 uint64_t total_mem = 0;
445 len = strnlen(strval, SOCKET_MEM_STRLEN);
446 if (len == SOCKET_MEM_STRLEN) {
447 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
451 /* all other error cases will be caught later */
452 if (!isdigit(strval[len-1]))
455 /* split the optarg into separate socket values */
456 arg_num = rte_strsplit(strval, len,
457 arg, RTE_MAX_NUMA_NODES, ',');
459 /* if split failed, or 0 arguments */
463 /* parse each defined socket option */
465 for (i = 0; i < arg_num; i++) {
468 val = strtoull(arg[i], &end, 10);
470 /* check for invalid input */
472 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
479 /* check if we have a positive amount of total memory */
487 eal_parse_base_virtaddr(const char *arg)
493 addr = strtoull(arg, &end, 16);
495 /* check for errors */
496 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
499 /* make sure we don't exceed 32-bit boundary on 32-bit target */
501 if (addr >= UINTPTR_MAX)
505 /* align the addr on 16M boundary, 16MB is the minimum huge page
506 * size on IBM Power architecture. If the addr is aligned to 16MB,
507 * it can align to 2MB for x86. So this alignment can also be used
509 internal_config.base_virtaddr =
510 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
516 eal_parse_vfio_intr(const char *mode)
521 enum rte_intr_mode value;
523 { "legacy", RTE_INTR_MODE_LEGACY },
524 { "msi", RTE_INTR_MODE_MSI },
525 { "msix", RTE_INTR_MODE_MSIX },
528 for (i = 0; i < RTE_DIM(map); i++) {
529 if (!strcmp(mode, map[i].name)) {
530 internal_config.vfio_intr_mode = map[i].value;
537 /* Parse the arguments for --log-level only */
539 eal_log_level_parse(int argc, char **argv)
544 const int old_optind = optind;
545 const int old_optopt = optopt;
546 char * const old_optarg = optarg;
551 while ((opt = getopt_long(argc, argvopt, eal_short_options,
552 eal_long_options, &option_index)) != EOF) {
556 /* getopt is not happy, stop right now */
560 ret = (opt == OPT_LOG_LEVEL_NUM) ?
561 eal_parse_common_option(opt, optarg, &internal_config) : 0;
563 /* common parser is not happy */
568 /* restore getopt lib */
574 /* Parse the argument given in the command line of the application */
576 eal_parse_args(int argc, char **argv)
581 char *prgname = argv[0];
582 const int old_optind = optind;
583 const int old_optopt = optopt;
584 char * const old_optarg = optarg;
589 while ((opt = getopt_long(argc, argvopt, eal_short_options,
590 eal_long_options, &option_index)) != EOF) {
592 /* getopt is not happy, stop right now */
599 ret = eal_parse_common_option(opt, optarg, &internal_config);
600 /* common parser is not happy */
606 /* common parser handled this option */
615 case OPT_HUGE_DIR_NUM:
616 internal_config.hugepage_dir = strdup(optarg);
619 case OPT_FILE_PREFIX_NUM:
620 internal_config.hugefile_prefix = strdup(optarg);
623 case OPT_SOCKET_MEM_NUM:
624 if (eal_parse_socket_arg(optarg,
625 internal_config.socket_mem) < 0) {
626 RTE_LOG(ERR, EAL, "invalid parameters for --"
627 OPT_SOCKET_MEM "\n");
632 internal_config.force_sockets = 1;
635 case OPT_SOCKET_LIMIT_NUM:
636 if (eal_parse_socket_arg(optarg,
637 internal_config.socket_limit) < 0) {
638 RTE_LOG(ERR, EAL, "invalid parameters for --"
639 OPT_SOCKET_LIMIT "\n");
644 internal_config.force_socket_limits = 1;
647 case OPT_BASE_VIRTADDR_NUM:
648 if (eal_parse_base_virtaddr(optarg) < 0) {
649 RTE_LOG(ERR, EAL, "invalid parameter for --"
650 OPT_BASE_VIRTADDR "\n");
657 case OPT_VFIO_INTR_NUM:
658 if (eal_parse_vfio_intr(optarg) < 0) {
659 RTE_LOG(ERR, EAL, "invalid parameters for --"
667 case OPT_CREATE_UIO_DEV_NUM:
668 internal_config.create_uio_dev = 1;
671 case OPT_MBUF_POOL_OPS_NAME_NUM:
672 internal_config.user_mbuf_pool_ops_name =
677 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
678 RTE_LOG(ERR, EAL, "Option %c is not supported "
680 } else if (opt >= OPT_LONG_MIN_NUM &&
681 opt < OPT_LONG_MAX_NUM) {
682 RTE_LOG(ERR, EAL, "Option %s is not supported "
684 eal_long_options[option_index].name);
686 RTE_LOG(ERR, EAL, "Option %d is not supported "
695 if (eal_adjust_config(&internal_config) != 0) {
701 if (eal_check_common_options(&internal_config) != 0) {
708 argv[optind-1] = prgname;
712 /* restore getopt lib */
721 check_socket(const struct rte_memseg_list *msl, void *arg)
723 int *socket_id = arg;
725 return *socket_id == msl->socket_id;
729 eal_check_mem_on_local_socket(void)
733 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
735 if (rte_memseg_list_walk(check_socket, &socket_id) == 0)
736 RTE_LOG(WARNING, EAL, "WARNING: Master core has no memory on local socket!\n");
740 sync_func(__attribute__((unused)) void *arg)
746 rte_eal_mcfg_complete(void)
748 /* ALL shared mem_config related INIT DONE */
749 if (rte_config.process_type == RTE_PROC_PRIMARY)
750 rte_config.mem_config->magic = RTE_MAGIC;
752 internal_config.init_complete = 1;
756 * Request iopl privilege for all RPL, returns 0 on success
757 * iopl() call is mostly for the i386 architecture. For other architectures,
758 * return -1 to indicate IO privilege can't be changed in this way.
761 rte_eal_iopl_init(void)
763 #if defined(RTE_ARCH_X86)
771 static int rte_eal_vfio_setup(void)
773 if (rte_vfio_enable("vfio"))
780 static void rte_eal_init_alert(const char *msg)
782 fprintf(stderr, "EAL: FATAL: %s\n", msg);
783 RTE_LOG(ERR, EAL, "%s\n", msg);
786 /* Launch threads, called at application init(). */
788 rte_eal_init(int argc, char **argv)
792 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
794 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
795 char thread_name[RTE_MAX_THREAD_NAME_LEN];
797 /* checks if the machine is adequate */
798 if (!rte_cpu_is_supported()) {
799 rte_eal_init_alert("unsupported cpu type.");
804 if (!rte_atomic32_test_and_set(&run_once)) {
805 rte_eal_init_alert("already called initialization.");
806 rte_errno = EALREADY;
810 logid = strrchr(argv[0], '/');
811 logid = strdup(logid ? logid + 1: argv[0]);
813 thread_id = pthread_self();
815 eal_reset_internal_config(&internal_config);
817 /* set log level as early as possible */
818 eal_log_level_parse(argc, argv);
820 if (rte_eal_cpu_init() < 0) {
821 rte_eal_init_alert("Cannot detect lcores.");
826 fctret = eal_parse_args(argc, argv);
828 rte_eal_init_alert("Invalid 'command line' arguments.");
830 rte_atomic32_clear(&run_once);
834 /* create runtime data directory */
835 if (internal_config.no_shconf == 0 &&
836 eal_create_runtime_dir() < 0) {
837 rte_eal_init_alert("Cannot create runtime directory\n");
842 if (eal_plugins_init() < 0) {
843 rte_eal_init_alert("Cannot init plugins\n");
845 rte_atomic32_clear(&run_once);
849 if (eal_option_device_parse()) {
851 rte_atomic32_clear(&run_once);
857 if (rte_eal_intr_init() < 0) {
858 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
862 /* Put mp channel init before bus scan so that we can init the vdev
863 * bus through mp channel in the secondary process before the bus scan.
865 if (rte_mp_channel_init() < 0) {
866 rte_eal_init_alert("failed to init mp channel\n");
867 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
873 if (rte_bus_scan()) {
874 rte_eal_init_alert("Cannot scan the buses for devices\n");
876 rte_atomic32_clear(&run_once);
880 /* autodetect the iova mapping mode (default is iova_pa) */
881 rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class();
883 /* Workaround for KNI which requires physical address to work */
884 if (rte_eal_get_configuration()->iova_mode == RTE_IOVA_VA &&
885 rte_eal_check_module("rte_kni") == 1) {
886 rte_eal_get_configuration()->iova_mode = RTE_IOVA_PA;
887 RTE_LOG(WARNING, EAL,
888 "Some devices want IOVA as VA but PA will be used because.. "
889 "KNI module inserted\n");
892 if (internal_config.no_hugetlbfs == 0) {
893 /* rte_config isn't initialized yet */
894 ret = internal_config.process_type == RTE_PROC_PRIMARY ?
895 eal_hugepage_info_init() :
896 eal_hugepage_info_read();
898 rte_eal_init_alert("Cannot get hugepage information.");
900 rte_atomic32_clear(&run_once);
905 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
906 if (internal_config.no_hugetlbfs)
907 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
910 if (internal_config.vmware_tsc_map == 1) {
911 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
912 rte_cycles_vmware_tsc_map = 1;
913 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
914 "you must have monitor_control.pseudo_perfctr = TRUE\n");
916 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
917 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
921 rte_srand(rte_rdtsc());
923 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) {
924 rte_eal_init_alert("Cannot init logging.");
926 rte_atomic32_clear(&run_once);
931 if (rte_eal_vfio_setup() < 0) {
932 rte_eal_init_alert("Cannot init VFIO\n");
934 rte_atomic32_clear(&run_once);
938 /* in secondary processes, memory init may allocate additional fbarrays
939 * not present in primary processes, so to avoid any potential issues,
940 * initialize memzones first.
942 if (rte_eal_memzone_init() < 0) {
943 rte_eal_init_alert("Cannot init memzone\n");
948 if (rte_eal_memory_init() < 0) {
949 rte_eal_init_alert("Cannot init memory\n");
954 /* the directories are locked during eal_hugepage_info_init */
955 eal_hugedirs_unlock();
957 if (rte_eal_malloc_heap_init() < 0) {
958 rte_eal_init_alert("Cannot init malloc heap\n");
963 if (rte_eal_tailqs_init() < 0) {
964 rte_eal_init_alert("Cannot init tail queues for objects\n");
969 if (rte_eal_alarm_init() < 0) {
970 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
971 /* rte_eal_alarm_init sets rte_errno on failure. */
975 if (rte_eal_timer_init() < 0) {
976 rte_eal_init_alert("Cannot init HPET or TSC timers\n");
981 eal_check_mem_on_local_socket();
983 eal_thread_init_master(rte_config.master_lcore);
985 ret = eal_thread_dump_affinity(cpuset, sizeof(cpuset));
987 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
988 rte_config.master_lcore, (int)thread_id, cpuset,
989 ret == 0 ? "" : "...");
991 RTE_LCORE_FOREACH_SLAVE(i) {
994 * create communication pipes between master thread
997 if (pipe(lcore_config[i].pipe_master2slave) < 0)
998 rte_panic("Cannot create pipe\n");
999 if (pipe(lcore_config[i].pipe_slave2master) < 0)
1000 rte_panic("Cannot create pipe\n");
1002 lcore_config[i].state = WAIT;
1004 /* create a thread for each lcore */
1005 ret = pthread_create(&lcore_config[i].thread_id, NULL,
1006 eal_thread_loop, NULL);
1008 rte_panic("Cannot create thread\n");
1010 /* Set thread_name for aid in debugging. */
1011 snprintf(thread_name, sizeof(thread_name),
1012 "lcore-slave-%d", i);
1013 ret = rte_thread_setname(lcore_config[i].thread_id,
1017 "Cannot set name for lcore thread\n");
1021 * Launch a dummy function on all slave lcores, so that master lcore
1022 * knows they are all ready when this function returns.
1024 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
1025 rte_eal_mp_wait_lcore();
1027 /* initialize services so vdevs register service during bus_probe. */
1028 ret = rte_service_init();
1030 rte_eal_init_alert("rte_service_init() failed\n");
1031 rte_errno = ENOEXEC;
1035 /* Probe all the buses and devices/drivers on them */
1036 if (rte_bus_probe()) {
1037 rte_eal_init_alert("Cannot probe devices\n");
1038 rte_errno = ENOTSUP;
1043 /* Register mp action after probe() so that we got enough info */
1044 if (rte_vfio_is_enabled("vfio") && vfio_mp_sync_setup() < 0)
1048 /* initialize default service/lcore mappings and start running. Ignore
1049 * -ENOTSUP, as it indicates no service coremask passed to EAL.
1051 ret = rte_service_start_with_defaults();
1052 if (ret < 0 && ret != -ENOTSUP) {
1053 rte_errno = ENOEXEC;
1057 rte_eal_mcfg_complete();
1063 mark_freeable(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
1064 void *arg __rte_unused)
1066 /* ms is const, so find this memseg */
1067 struct rte_memseg *found = rte_mem_virt2memseg(ms->addr, msl);
1069 found->flags &= ~RTE_MEMSEG_FLAG_DO_NOT_FREE;
1074 int __rte_experimental
1075 rte_eal_cleanup(void)
1077 /* if we're in a primary process, we need to mark hugepages as freeable
1078 * so that finalization can release them back to the system.
1080 if (rte_eal_process_type() == RTE_PROC_PRIMARY)
1081 rte_memseg_walk(mark_freeable, NULL);
1082 rte_service_finalize();
1087 enum rte_lcore_role_t
1088 rte_eal_lcore_role(unsigned lcore_id)
1090 return rte_config.lcore_role[lcore_id];
1093 enum rte_proc_type_t
1094 rte_eal_process_type(void)
1096 return rte_config.process_type;
1099 int rte_eal_has_hugepages(void)
1101 return ! internal_config.no_hugetlbfs;
1104 int rte_eal_has_pci(void)
1106 return !internal_config.no_pci;
1109 int rte_eal_create_uio_dev(void)
1111 return internal_config.create_uio_dev;
1115 rte_eal_vfio_intr_mode(void)
1117 return internal_config.vfio_intr_mode;
1121 rte_eal_check_module(const char *module_name)
1123 char sysfs_mod_name[PATH_MAX];
1127 if (NULL == module_name)
1130 /* Check if there is sysfs mounted */
1131 if (stat("/sys/module", &st) != 0) {
1132 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
1133 errno, strerror(errno));
1137 /* A module might be built-in, therefore try sysfs */
1138 n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
1139 if (n < 0 || n > PATH_MAX) {
1140 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
1144 if (stat(sysfs_mod_name, &st) != 0) {
1145 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
1146 sysfs_mod_name, errno, strerror(errno));
1150 /* Module has been found */