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From: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
To: harry.van.haaren@intel.com
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Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Date: Mon, 28 Aug 2017 21:36:45 +0530
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Subject: [dpdk-dev] [PATCH v2] service: add API for service count per lcore
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This new API returns the number of services that are running on a specific
service core. It allows an application to decide which service core to run
a new service on.
Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
---
v2 changes:
- reword the commit title according to the check-git-log.sh
- modify return types
- add function to .map file
lib/librte_eal/bsdapp/eal/rte_eal_version.map | 7 +++++++
lib/librte_eal/common/include/rte_service.h | 13 +++++++++++++
lib/librte_eal/common/rte_service.c | 13 +++++++++++++
lib/librte_eal/linuxapp/eal/rte_eal_version.map | 7 +++++++
4 files changed, 40 insertions(+)
diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index aac6fd7..5fe8d79 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -237,3 +237,10 @@ EXPERIMENTAL {
rte_service_unregister;
} DPDK_17.08;
+
+EXPERIMENTAL {
+ global:
+
+ rte_service_lcore_count_services;
+
+} DPDK_17.11;
diff --git a/lib/librte_eal/common/include/rte_service.h b/lib/librte_eal/common/include/rte_service.h
index 7c6f738..9537ae5 100644
--- a/lib/librte_eal/common/include/rte_service.h
+++ b/lib/librte_eal/common/include/rte_service.h
@@ -374,6 +374,19 @@ int32_t rte_service_lcore_list(uint32_t array[], uint32_t n);
* @warning
* @b EXPERIMENTAL: this API may change without prior notice
*
+ * Get the numer of services running on the supplied lcore.
+ *
+ * @param Lcore Id of the service core.
+ * @retval >=0 Number of services registered to this core.
+ * @retval -EINVAL Invalid lcore provided
+ * @retval -ENOTSUP The provided lcore is not a service core.
+ */
+int32_t rte_service_lcore_count_services(uint32_t lcore);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
* Dumps any information available about the service. If service is NULL,
* dumps info for all services.
*/
diff --git a/lib/librte_eal/common/rte_service.c b/lib/librte_eal/common/rte_service.c
index 7efb76d..616bad3 100644
--- a/lib/librte_eal/common/rte_service.c
+++ b/lib/librte_eal/common/rte_service.c
@@ -397,6 +397,19 @@ rte_service_lcore_list(uint32_t array[], uint32_t n)
}
int32_t
+rte_service_lcore_count_services(uint32_t lcore)
+{
+ if (lcore >= RTE_MAX_LCORE)
+ return -EINVAL;
+
+ struct core_state *cs = &lcore_states[lcore];
+ if (!cs->is_service_core)
+ return -ENOTSUP;
+
+ return __builtin_popcountll(cs->service_mask);
+}
+
+int32_t
rte_service_start_with_defaults(void)
{
/* create a default mapping from cores to services, then start the
diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
index 3a8f154..e848c45 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -242,3 +242,10 @@ EXPERIMENTAL {
rte_service_unregister;
} DPDK_17.08;
+
+EXPERIMENTAL {
+ global:
+
+ rte_service_lcore_count_services;
+
+} DPDK_17.11;
--
2.7.4