From 5583037a795076f74f767d55a00c652f5b8f1382 Mon Sep 17 00:00:00 2001 From: Patrick Lu Date: Wed, 11 Jun 2014 13:45:09 -0700 Subject: [PATCH] eal: get relative core index EAL -c option allows the user to enable any lcore in the system. Often times, the user app wants to know 1st enabled core, 2nd enabled core, etc, rather than phyical core ID (rte_lcore_id().) The new API rte_lcore_index() will return an index from enabled lcores starting from zero. Signed-off-by: Patrick Lu Signed-off-by: Thomas Monjalon Acked-by: Bruce Richardson --- lib/librte_eal/common/eal_common_options.c | 13 ++++++++++--- lib/librte_eal/common/include/rte_lcore.h | 20 ++++++++++++++++++++ 2 files changed, 30 insertions(+), 3 deletions(-) diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c index 18d03e3187..c9df8f5fad 100644 --- a/lib/librte_eal/common/eal_common_options.c +++ b/lib/librte_eal/common/eal_common_options.c @@ -185,19 +185,23 @@ eal_parse_coremask(const char *coremask) return -1; } cfg->lcore_role[idx] = ROLE_RTE; + lcore_config[idx].core_index = count; if (count == 0) cfg->master_lcore = idx; count++; } else { cfg->lcore_role[idx] = ROLE_OFF; + lcore_config[idx].core_index = -1; } } } for (; i >= 0; i--) if (coremask[i] != '0') return -1; - for (; idx < RTE_MAX_LCORE; idx++) + for (; idx < RTE_MAX_LCORE; idx++) { cfg->lcore_role[idx] = ROLE_OFF; + lcore_config[idx].core_index = -1; + } if (count == 0) return -1; /* Update the count of enabled logical cores of the EAL configuration */ @@ -225,9 +229,11 @@ eal_parse_corelist(const char *corelist) while ((i > 0) && isblank(corelist[i - 1])) i--; - /* Reset core roles */ - for (idx = 0; idx < RTE_MAX_LCORE; idx++) + /* Reset config */ + for (idx = 0; idx < RTE_MAX_LCORE; idx++) { cfg->lcore_role[idx] = ROLE_OFF; + lcore_config[idx].core_index = -1; + } /* Get list of cores */ min = RTE_MAX_LCORE; @@ -250,6 +256,7 @@ eal_parse_corelist(const char *corelist) min = idx; for (idx = min; idx <= max; idx++) { cfg->lcore_role[idx] = ROLE_RTE; + lcore_config[idx].core_index = count; if (count == 0) cfg->master_lcore = idx; count++; diff --git a/lib/librte_eal/common/include/rte_lcore.h b/lib/librte_eal/common/include/rte_lcore.h index a0b4356952..49b2c03413 100644 --- 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. -- 2.20.1