eal: restrict control threads to startup CPU affinity

[dpdk.git] / lib / librte_eal / common / eal_common_options.c

diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 4681333..9e61ee4 100644 (file)
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -217,6 +217,7 @@ eal_reset_internal_config(struct internal_config *internal_cfg)
        internal_cfg->create_uio_dev = 0;
        internal_cfg->iova_mode = RTE_IOVA_DC;
        internal_cfg->user_mbuf_pool_ops_name = NULL;
+       CPU_ZERO(&internal_cfg->ctrl_cpuset);
        internal_cfg->init_complete = 0;
 }
 
@@ -1343,10 +1344,9 @@ eal_auto_detect_cores(struct rte_config *cfg)
        unsigned int lcore_id;
        unsigned int removed = 0;
        rte_cpuset_t affinity_set;
-       pthread_t tid = pthread_self();
 
-       if (pthread_getaffinity_np(tid, sizeof(rte_cpuset_t),
-                               &affinity_set) < 0)
+       if (pthread_getaffinity_np(pthread_self(), sizeof(rte_cpuset_t),
+                               &affinity_set))
                CPU_ZERO(&affinity_set);
 
        for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
@@ -1360,6 +1360,31 @@ eal_auto_detect_cores(struct rte_config *cfg)
        cfg->lcore_count -= removed;
 }
 
+static void
+compute_ctrl_threads_cpuset(struct internal_config *internal_cfg)
+{
+       rte_cpuset_t *cpuset = &internal_cfg->ctrl_cpuset;
+       rte_cpuset_t default_set;
+       unsigned int lcore_id;
+
+       for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+               if (eal_cpu_detected(lcore_id) &&
+                               rte_lcore_has_role(lcore_id, ROLE_OFF)) {
+                       CPU_SET(lcore_id, cpuset);
+               }
+       }
+
+       if (pthread_getaffinity_np(pthread_self(), sizeof(rte_cpuset_t),
+                               &default_set))
+               CPU_ZERO(&default_set);
+
+       RTE_CPU_AND(cpuset, cpuset, &default_set);
+
+       /* if no detected CPU is off, use master core */
+       if (!CPU_COUNT(cpuset))
+               CPU_SET(rte_get_master_lcore(), cpuset);
+}
+
 int
 eal_cleanup_config(struct internal_config *internal_cfg)
 {
@@ -1388,9 +1413,13 @@ eal_adjust_config(struct internal_config *internal_cfg)
        /* default master lcore is the first one */
        if (!master_lcore_parsed) {
                cfg->master_lcore = rte_get_next_lcore(-1, 0, 0);
+               if (cfg->master_lcore >= RTE_MAX_LCORE)
+                       return -1;
                lcore_config[cfg->master_lcore].core_role = ROLE_RTE;
        }
 
+       compute_ctrl_threads_cpuset(internal_cfg);
+
        /* if no memory amounts were requested, this will result in 0 and
         * will be overridden later, right after eal_hugepage_info_init() */
        for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
@@ -1413,6 +1442,21 @@ eal_check_common_options(struct internal_config *internal_cfg)
                RTE_LOG(ERR, EAL, "Invalid process type specified\n");
                return -1;
        }
+       if (internal_cfg->hugefile_prefix != NULL &&
+                       strlen(internal_cfg->hugefile_prefix) < 1) {
+               RTE_LOG(ERR, EAL, "Invalid length of --" OPT_FILE_PREFIX " option\n");
+               return -1;
+       }
+       if (internal_cfg->hugepage_dir != NULL &&
+                       strlen(internal_cfg->hugepage_dir) < 1) {
+               RTE_LOG(ERR, EAL, "Invalid length of --" OPT_HUGE_DIR" option\n");
+               return -1;
+       }
+       if (internal_cfg->user_mbuf_pool_ops_name != NULL &&
+                       strlen(internal_cfg->user_mbuf_pool_ops_name) < 1) {
+               RTE_LOG(ERR, EAL, "Invalid length of --" OPT_MBUF_POOL_OPS_NAME" option\n");
+               return -1;
+       }
        if (index(eal_get_hugefile_prefix(), '%') != NULL) {
                RTE_LOG(ERR, EAL, "Invalid char, '%%', in --"OPT_FILE_PREFIX" "
                        "option\n");