eal: get relative core index

[dpdk.git] / lib / librte_eal / common / include / rte_lcore.h

diff --git a/lib/librte_eal/common/include/rte_lcore.h b/lib/librte_eal/common/include/rte_lcore.h
index a0b4356..49b2c03 100644 (file)
--- a/lib/librte_eal/common/include/rte_lcore.h
+++ b/lib/librte_eal/common/include/rte_lcore.h
@@ -64,6 +64,7 @@ struct lcore_config {
        volatile enum rte_lcore_state_t state; /**< lcore state */
        unsigned socket_id;        /**< physical socket id for this lcore */
        unsigned core_id;          /**< core number on socket for this lcore */
+       int core_index;            /**< relative index, starting from 0 */
 };
 
 /**
@@ -109,6 +110,25 @@ rte_lcore_count(void)
        return cfg->lcore_count;
 }
 
+/**
+ * Return the index of the lcore starting from zero.
+ * The order is physical or given by command line (-l option).
+ *
+ * @param lcore_id
+ *   The targeted lcore, or -1 for the current one.
+ * @return
+ *   The relative index, or -1 if not enabled.
+ */
+static inline int
+rte_lcore_index(int lcore_id)
+{
+       if (lcore_id >= RTE_MAX_LCORE)
+               return -1;
+       if (lcore_id < 0)
+               lcore_id = rte_lcore_id();
+       return lcore_config[lcore_id].core_index;
+}
+
 /**
  * Return the ID of the physical socket of the logical core we are
  * running on.