4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
50 #include <sys/queue.h>
52 #if defined(RTE_ARCH_X86)
56 #include <rte_common.h>
57 #include <rte_debug.h>
58 #include <rte_memory.h>
59 #include <rte_memzone.h>
60 #include <rte_launch.h>
62 #include <rte_eal_memconfig.h>
63 #include <rte_errno.h>
64 #include <rte_per_lcore.h>
65 #include <rte_lcore.h>
66 #include <rte_service_component.h>
68 #include <rte_random.h>
69 #include <rte_cycles.h>
70 #include <rte_string_fns.h>
71 #include <rte_cpuflags.h>
72 #include <rte_interrupts.h>
76 #include <rte_devargs.h>
77 #include <rte_version.h>
78 #include <rte_atomic.h>
79 #include <malloc_heap.h>
81 #include "eal_private.h"
82 #include "eal_thread.h"
83 #include "eal_internal_cfg.h"
84 #include "eal_filesystem.h"
85 #include "eal_hugepages.h"
86 #include "eal_options.h"
89 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
91 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
93 /* Allow the application to print its usage message too if set */
94 static rte_usage_hook_t rte_application_usage_hook = NULL;
96 /* early configuration structure, when memory config is not mmapped */
97 static struct rte_mem_config early_mem_config;
99 /* define fd variable here, because file needs to be kept open for the
100 * duration of the program, as we hold a write lock on it in the primary proc */
101 static int mem_cfg_fd = -1;
103 static struct flock wr_lock = {
105 .l_whence = SEEK_SET,
106 .l_start = offsetof(struct rte_mem_config, memseg),
107 .l_len = sizeof(early_mem_config.memseg),
110 /* Address of global and public configuration */
111 static struct rte_config rte_config = {
112 .mem_config = &early_mem_config,
115 /* internal configuration (per-core) */
116 struct lcore_config lcore_config[RTE_MAX_LCORE];
118 /* internal configuration */
119 struct internal_config internal_config;
121 /* used by rte_rdtsc() */
122 int rte_cycles_vmware_tsc_map;
124 /* Return mbuf pool ops name */
126 rte_eal_mbuf_default_mempool_ops(void)
128 return internal_config.mbuf_pool_ops_name;
131 /* Return a pointer to the configuration structure */
133 rte_eal_get_configuration(void)
139 rte_eal_iova_mode(void)
141 return rte_eal_get_configuration()->iova_mode;
144 /* parse a sysfs (or other) file containing one integer value */
146 eal_parse_sysfs_value(const char *filename, unsigned long *val)
152 if ((f = fopen(filename, "r")) == NULL) {
153 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
158 if (fgets(buf, sizeof(buf), f) == NULL) {
159 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
164 *val = strtoul(buf, &end, 0);
165 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
166 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
176 /* create memory configuration in shared/mmap memory. Take out
177 * a write lock on the memsegs, so we can auto-detect primary/secondary.
178 * This means we never close the file while running (auto-close on exit).
179 * We also don't lock the whole file, so that in future we can use read-locks
180 * on other parts, e.g. memzones, to detect if there are running secondary
183 rte_eal_config_create(void)
185 void *rte_mem_cfg_addr;
188 const char *pathname = eal_runtime_config_path();
190 if (internal_config.no_shconf)
193 /* map the config before hugepage address so that we don't waste a page */
194 if (internal_config.base_virtaddr != 0)
195 rte_mem_cfg_addr = (void *)
196 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
197 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
199 rte_mem_cfg_addr = NULL;
202 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
204 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
207 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
210 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
213 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
216 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
217 "process running?\n", pathname);
220 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
221 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
223 if (rte_mem_cfg_addr == MAP_FAILED){
224 rte_panic("Cannot mmap memory for rte_config\n");
226 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
227 rte_config.mem_config = rte_mem_cfg_addr;
229 /* store address of the config in the config itself so that secondary
230 * processes could later map the config into this exact location */
231 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
235 /* attach to an existing shared memory config */
237 rte_eal_config_attach(void)
239 struct rte_mem_config *mem_config;
241 const char *pathname = eal_runtime_config_path();
243 if (internal_config.no_shconf)
247 mem_cfg_fd = open(pathname, O_RDWR);
249 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
252 /* map it as read-only first */
253 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
254 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
255 if (mem_config == MAP_FAILED)
256 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
257 errno, strerror(errno));
259 rte_config.mem_config = mem_config;
262 /* reattach the shared config at exact memory location primary process has it */
264 rte_eal_config_reattach(void)
266 struct rte_mem_config *mem_config;
267 void *rte_mem_cfg_addr;
269 if (internal_config.no_shconf)
272 /* save the address primary process has mapped shared config to */
273 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
275 /* unmap original config */
276 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
278 /* remap the config at proper address */
279 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
280 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
282 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
283 if (mem_config != MAP_FAILED)
284 /* errno is stale, don't use */
285 rte_panic("Cannot mmap memory for rte_config at [%p], got [%p]"
286 " - please use '--base-virtaddr' option\n",
287 rte_mem_cfg_addr, mem_config);
289 rte_panic("Cannot mmap memory for rte_config! error %i (%s)\n",
290 errno, strerror(errno));
294 rte_config.mem_config = mem_config;
297 /* Detect if we are a primary or a secondary process */
299 eal_proc_type_detect(void)
301 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
302 const char *pathname = eal_runtime_config_path();
304 /* if we can open the file but not get a write-lock we are a secondary
305 * process. NOTE: if we get a file handle back, we keep that open
306 * and don't close it to prevent a race condition between multiple opens */
307 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
308 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
309 ptype = RTE_PROC_SECONDARY;
311 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
312 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
317 /* Sets up rte_config structure with the pointer to shared memory config.*/
319 rte_config_init(void)
321 rte_config.process_type = internal_config.process_type;
323 switch (rte_config.process_type){
324 case RTE_PROC_PRIMARY:
325 rte_eal_config_create();
327 case RTE_PROC_SECONDARY:
328 rte_eal_config_attach();
329 rte_eal_mcfg_wait_complete(rte_config.mem_config);
330 rte_eal_config_reattach();
333 case RTE_PROC_INVALID:
334 rte_panic("Invalid process type\n");
338 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
340 eal_hugedirs_unlock(void)
344 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
346 /* skip uninitialized */
347 if (internal_config.hugepage_info[i].lock_descriptor < 0)
349 /* unlock hugepage file */
350 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
351 close(internal_config.hugepage_info[i].lock_descriptor);
352 /* reset the field */
353 internal_config.hugepage_info[i].lock_descriptor = -1;
359 eal_usage(const char *prgname)
361 printf("\nUsage: %s ", prgname);
363 printf("EAL Linux options:\n"
364 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
365 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
366 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
367 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
368 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
369 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
370 " --"OPT_XEN_DOM0" Support running on Xen dom0 without hugetlbfs\n"
372 /* Allow the application to print its usage message too if hook is set */
373 if ( rte_application_usage_hook ) {
374 printf("===== Application Usage =====\n\n");
375 rte_application_usage_hook(prgname);
379 /* Set a per-application usage message */
381 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
383 rte_usage_hook_t old_func;
385 /* Will be NULL on the first call to denote the last usage routine. */
386 old_func = rte_application_usage_hook;
387 rte_application_usage_hook = usage_func;
393 eal_parse_socket_mem(char *socket_mem)
395 char * arg[RTE_MAX_NUMA_NODES];
398 uint64_t total_mem = 0;
400 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
401 if (len == SOCKET_MEM_STRLEN) {
402 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
406 /* all other error cases will be caught later */
407 if (!isdigit(socket_mem[len-1]))
410 /* split the optarg into separate socket values */
411 arg_num = rte_strsplit(socket_mem, len,
412 arg, RTE_MAX_NUMA_NODES, ',');
414 /* if split failed, or 0 arguments */
418 internal_config.force_sockets = 1;
420 /* parse each defined socket option */
422 for (i = 0; i < arg_num; i++) {
424 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
426 /* check for invalid input */
428 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
430 internal_config.socket_mem[i] *= 1024ULL;
431 internal_config.socket_mem[i] *= 1024ULL;
432 total_mem += internal_config.socket_mem[i];
435 /* check if we have a positive amount of total memory */
443 eal_parse_base_virtaddr(const char *arg)
449 addr = strtoull(arg, &end, 16);
451 /* check for errors */
452 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
455 /* make sure we don't exceed 32-bit boundary on 32-bit target */
457 if (addr >= UINTPTR_MAX)
461 /* align the addr on 16M boundary, 16MB is the minimum huge page
462 * size on IBM Power architecture. If the addr is aligned to 16MB,
463 * it can align to 2MB for x86. So this alignment can also be used
465 internal_config.base_virtaddr =
466 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
472 eal_parse_vfio_intr(const char *mode)
477 enum rte_intr_mode value;
479 { "legacy", RTE_INTR_MODE_LEGACY },
480 { "msi", RTE_INTR_MODE_MSI },
481 { "msix", RTE_INTR_MODE_MSIX },
484 for (i = 0; i < RTE_DIM(map); i++) {
485 if (!strcmp(mode, map[i].name)) {
486 internal_config.vfio_intr_mode = map[i].value;
493 /* Parse the arguments for --log-level only */
495 eal_log_level_parse(int argc, char **argv)
500 const int old_optind = optind;
501 const int old_optopt = optopt;
502 char * const old_optarg = optarg;
507 while ((opt = getopt_long(argc, argvopt, eal_short_options,
508 eal_long_options, &option_index)) != EOF) {
512 /* getopt is not happy, stop right now */
516 ret = (opt == OPT_LOG_LEVEL_NUM) ?
517 eal_parse_common_option(opt, optarg, &internal_config) : 0;
519 /* common parser is not happy */
524 /* restore getopt lib */
530 /* Parse the argument given in the command line of the application */
532 eal_parse_args(int argc, char **argv)
537 char *prgname = argv[0];
538 const int old_optind = optind;
539 const int old_optopt = optopt;
540 char * const old_optarg = optarg;
545 while ((opt = getopt_long(argc, argvopt, eal_short_options,
546 eal_long_options, &option_index)) != EOF) {
548 /* getopt is not happy, stop right now */
555 ret = eal_parse_common_option(opt, optarg, &internal_config);
556 /* common parser is not happy */
562 /* common parser handled this option */
572 case OPT_XEN_DOM0_NUM:
573 #ifdef RTE_LIBRTE_XEN_DOM0
574 internal_config.xen_dom0_support = 1;
576 RTE_LOG(ERR, EAL, "Can't support DPDK app "
577 "running on Dom0, please configure"
578 " RTE_LIBRTE_XEN_DOM0=y\n");
584 case OPT_HUGE_DIR_NUM:
585 internal_config.hugepage_dir = optarg;
588 case OPT_FILE_PREFIX_NUM:
589 internal_config.hugefile_prefix = optarg;
592 case OPT_SOCKET_MEM_NUM:
593 if (eal_parse_socket_mem(optarg) < 0) {
594 RTE_LOG(ERR, EAL, "invalid parameters for --"
595 OPT_SOCKET_MEM "\n");
602 case OPT_BASE_VIRTADDR_NUM:
603 if (eal_parse_base_virtaddr(optarg) < 0) {
604 RTE_LOG(ERR, EAL, "invalid parameter for --"
605 OPT_BASE_VIRTADDR "\n");
612 case OPT_VFIO_INTR_NUM:
613 if (eal_parse_vfio_intr(optarg) < 0) {
614 RTE_LOG(ERR, EAL, "invalid parameters for --"
622 case OPT_CREATE_UIO_DEV_NUM:
623 internal_config.create_uio_dev = 1;
626 case OPT_MBUF_POOL_OPS_NAME_NUM:
627 internal_config.mbuf_pool_ops_name = optarg;
631 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
632 RTE_LOG(ERR, EAL, "Option %c is not supported "
634 } else if (opt >= OPT_LONG_MIN_NUM &&
635 opt < OPT_LONG_MAX_NUM) {
636 RTE_LOG(ERR, EAL, "Option %s is not supported "
638 eal_long_options[option_index].name);
640 RTE_LOG(ERR, EAL, "Option %d is not supported "
649 if (eal_adjust_config(&internal_config) != 0) {
655 if (eal_check_common_options(&internal_config) != 0) {
661 /* --xen-dom0 doesn't make sense with --socket-mem */
662 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
663 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
664 "together with --"OPT_XEN_DOM0"\n");
671 argv[optind-1] = prgname;
675 /* restore getopt lib */
684 eal_check_mem_on_local_socket(void)
686 const struct rte_memseg *ms;
689 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
691 ms = rte_eal_get_physmem_layout();
693 for (i = 0; i < RTE_MAX_MEMSEG; i++)
694 if (ms[i].socket_id == socket_id &&
698 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
699 "memory on local socket!\n");
703 sync_func(__attribute__((unused)) void *arg)
709 rte_eal_mcfg_complete(void)
711 /* ALL shared mem_config related INIT DONE */
712 if (rte_config.process_type == RTE_PROC_PRIMARY)
713 rte_config.mem_config->magic = RTE_MAGIC;
717 * Request iopl privilege for all RPL, returns 0 on success
718 * iopl() call is mostly for the i386 architecture. For other architectures,
719 * return -1 to indicate IO privilege can't be changed in this way.
722 rte_eal_iopl_init(void)
724 #if defined(RTE_ARCH_X86)
732 static int rte_eal_vfio_setup(void)
734 int vfio_enabled = 0;
736 if (!internal_config.no_pci) {
738 vfio_enabled |= pci_vfio_is_enabled();
743 /* if we are primary process, create a thread to communicate with
744 * secondary processes. the thread will use a socket to wait for
745 * requests from secondary process to send open file descriptors,
746 * because VFIO does not allow multiple open descriptors on a group or
749 if (internal_config.process_type == RTE_PROC_PRIMARY &&
750 vfio_mp_sync_setup() < 0)
758 static void rte_eal_init_alert(const char *msg)
760 fprintf(stderr, "EAL: FATAL: %s\n", msg);
761 RTE_LOG(ERR, EAL, "%s\n", msg);
764 /* Launch threads, called at application init(). */
766 rte_eal_init(int argc, char **argv)
770 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
772 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
773 char thread_name[RTE_MAX_THREAD_NAME_LEN];
775 /* checks if the machine is adequate */
776 if (!rte_cpu_is_supported()) {
777 rte_eal_init_alert("unsupported cpu type.");
782 if (!rte_atomic32_test_and_set(&run_once)) {
783 rte_eal_init_alert("already called initialization.");
784 rte_errno = EALREADY;
788 logid = strrchr(argv[0], '/');
789 logid = strdup(logid ? logid + 1: argv[0]);
791 thread_id = pthread_self();
793 eal_reset_internal_config(&internal_config);
795 /* set log level as early as possible */
796 eal_log_level_parse(argc, argv);
798 if (rte_eal_cpu_init() < 0) {
799 rte_eal_init_alert("Cannot detect lcores.");
804 fctret = eal_parse_args(argc, argv);
806 rte_eal_init_alert("Invalid 'command line' arguments.");
808 rte_atomic32_clear(&run_once);
812 if (eal_option_device_parse()) {
814 rte_atomic32_clear(&run_once);
818 if (rte_bus_scan()) {
819 rte_eal_init_alert("Cannot scan the buses for devices\n");
821 rte_atomic32_clear(&run_once);
825 /* autodetect the iova mapping mode (default is iova_pa) */
826 rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class();
828 if (internal_config.no_hugetlbfs == 0 &&
829 internal_config.process_type != RTE_PROC_SECONDARY &&
830 internal_config.xen_dom0_support == 0 &&
831 eal_hugepage_info_init() < 0) {
832 rte_eal_init_alert("Cannot get hugepage information.");
834 rte_atomic32_clear(&run_once);
838 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
839 if (internal_config.no_hugetlbfs)
840 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
843 if (internal_config.vmware_tsc_map == 1) {
844 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
845 rte_cycles_vmware_tsc_map = 1;
846 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
847 "you must have monitor_control.pseudo_perfctr = TRUE\n");
849 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
850 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
854 rte_srand(rte_rdtsc());
858 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) {
859 rte_eal_init_alert("Cannot init logging.");
861 rte_atomic32_clear(&run_once);
866 if (rte_eal_vfio_setup() < 0) {
867 rte_eal_init_alert("Cannot init VFIO\n");
869 rte_atomic32_clear(&run_once);
874 if (rte_eal_memory_init() < 0) {
875 rte_eal_init_alert("Cannot init memory\n");
880 /* the directories are locked during eal_hugepage_info_init */
881 eal_hugedirs_unlock();
883 if (rte_eal_memzone_init() < 0) {
884 rte_eal_init_alert("Cannot init memzone\n");
889 if (rte_eal_tailqs_init() < 0) {
890 rte_eal_init_alert("Cannot init tail queues for objects\n");
895 if (rte_eal_alarm_init() < 0) {
896 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
897 /* rte_eal_alarm_init sets rte_errno on failure. */
901 if (rte_eal_timer_init() < 0) {
902 rte_eal_init_alert("Cannot init HPET or TSC timers\n");
907 eal_check_mem_on_local_socket();
909 if (eal_plugins_init() < 0)
910 rte_eal_init_alert("Cannot init plugins\n");
912 eal_thread_init_master(rte_config.master_lcore);
914 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
916 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
917 rte_config.master_lcore, (int)thread_id, cpuset,
918 ret == 0 ? "" : "...");
920 if (rte_eal_intr_init() < 0) {
921 rte_eal_init_alert("Cannot init interrupt-handling thread\n");
925 RTE_LCORE_FOREACH_SLAVE(i) {
928 * create communication pipes between master thread
931 if (pipe(lcore_config[i].pipe_master2slave) < 0)
932 rte_panic("Cannot create pipe\n");
933 if (pipe(lcore_config[i].pipe_slave2master) < 0)
934 rte_panic("Cannot create pipe\n");
936 lcore_config[i].state = WAIT;
938 /* create a thread for each lcore */
939 ret = pthread_create(&lcore_config[i].thread_id, NULL,
940 eal_thread_loop, NULL);
942 rte_panic("Cannot create thread\n");
944 /* Set thread_name for aid in debugging. */
945 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
946 "lcore-slave-%d", i);
947 ret = rte_thread_setname(lcore_config[i].thread_id,
951 "Cannot set name for lcore thread\n");
955 * Launch a dummy function on all slave lcores, so that master lcore
956 * knows they are all ready when this function returns.
958 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
959 rte_eal_mp_wait_lcore();
961 /* initialize services so vdevs register service during bus_probe. */
962 ret = rte_service_init();
964 rte_eal_init_alert("rte_service_init() failed\n");
969 /* Probe all the buses and devices/drivers on them */
970 if (rte_bus_probe()) {
971 rte_eal_init_alert("Cannot probe devices\n");
976 /* initialize default service/lcore mappings and start running. Ignore
977 * -ENOTSUP, as it indicates no service coremask passed to EAL.
979 ret = rte_service_start_with_defaults();
980 if (ret < 0 && ret != -ENOTSUP) {
985 rte_eal_mcfg_complete();
991 enum rte_lcore_role_t
992 rte_eal_lcore_role(unsigned lcore_id)
994 return rte_config.lcore_role[lcore_id];
998 rte_eal_process_type(void)
1000 return rte_config.process_type;
1003 int rte_eal_has_hugepages(void)
1005 return ! internal_config.no_hugetlbfs;
1009 rte_eal_check_module(const char *module_name)
1011 char sysfs_mod_name[PATH_MAX];
1015 if (NULL == module_name)
1018 /* Check if there is sysfs mounted */
1019 if (stat("/sys/module", &st) != 0) {
1020 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
1021 errno, strerror(errno));
1025 /* A module might be built-in, therefore try sysfs */
1026 n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
1027 if (n < 0 || n > PATH_MAX) {
1028 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
1032 if (stat(sysfs_mod_name, &st) != 0) {
1033 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
1034 sysfs_mod_name, errno, strerror(errno));
1038 /* Module has been found */