Add API to scan through the ethernet devices and return the best mbuf
mempool ops name.
If no such mempool is found it returns the default mempool configured.
Signed-off-by: Pavan Nikhilesh <pbhagavat...@caviumnetworks.com>
---
lib/librte_ether/rte_ethdev.c | 41 +++++++++++++++++++++++++++++++++
lib/librte_ether/rte_ethdev.h | 12 ++++++++++
lib/librte_ether/rte_ethdev_version.map | 7 ++++++
lib/librte_mempool/rte_mempool.h | 12 ++++++++++
4 files changed, 72 insertions(+)
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 318af2869..514037ec2 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -3591,3 +3591,44 @@ rte_eth_dev_pool_ops_supported(uint16_t port_id, const
char *pool)
return (*dev->dev_ops->pool_ops_supported)(dev, pool);
}
+
+const char *
+rte_eth_dev_get_preferred_pool_name(uint8_t set_default)
+{
+ int i, j;
+ int ret;
+ int best_weight = 0;
+ int default_pool_weight = 0;
+ const char *default_pool_name = rte_eal_mbuf_default_mempool_ops();
+ const char *preferred_pool_name = NULL;
+
+ for (i = 0; i < rte_mempool_ops_count(); i++) {
+ int weight = 0;
+ const char *name = rte_mempool_get_ops(i)->name;
+
+ for (j = 0; j < rte_eth_dev_count(); j++) {
+ ret = rte_eth_dev_pool_ops_supported(j, name);
+ if (ret < 0) {
+ weight = -1;
+ break;
+ }
+ weight += ret ? 1 : 2;
+ }
+
+ if (weight > best_weight) {
+ best_weight = weight;
+ preferred_pool_name = name;
+ }
+
+ if (!strcmp(name, default_pool_name))
+ default_pool_weight = weight;
+ }
+
+ if (!best_weight || best_weight == default_pool_weight)
+ preferred_pool_name = default_pool_name;
+
+ if (set_default)
+ rte_eal_set_mbuf_default_mempool_ops(preferred_pool_name);
+
+ return preferred_pool_name;
+}
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 341c2d624..3f4b234a0 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -4606,6 +4606,18 @@ int rte_eth_dev_adjust_nb_rx_tx_desc(uint16_t port_id,
int
rte_eth_dev_pool_ops_supported(uint16_t port_id, const char *pool);
+/**
+ * Scan through the ethernet devices and select the best mempool ops supported
+ * across them.
+ *
+ * @param set_default
+ * Set the selected mempool ops as default.
+ * @return
+ * The name of the selected mempool ops.
+ */
+const char *
+rte_eth_dev_get_preferred_pool_name(uint8_t set_default);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/librte_ether/rte_ethdev_version.map
b/lib/librte_ether/rte_ethdev_version.map
index e9681ac8e..674a59c92 100644
--- a/lib/librte_ether/rte_ethdev_version.map
+++ b/lib/librte_ether/rte_ethdev_version.map
@@ -198,6 +198,13 @@ DPDK_17.11 {
} DPDK_17.08;
+DPDK_18.02 {
+ global:
+
+ rte_eth_dev_get_preferred_pool_name;
+
+} DPDK_17.11;
+
EXPERIMENTAL {
global:
diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index 721227f6d..27033102d 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -485,6 +485,18 @@ rte_mempool_get_ops(int ops_index)
return &rte_mempool_ops_table.ops[ops_index];
}
+/**
+ * @internal Get the total number of mempool ops.
+ *
+ * @return
+ * The number of mempool ops in the ops table.
+ */
+static inline int
+rte_mempool_ops_count(void)
+{
+ return rte_mempool_ops_table.num_ops;
+}
+
/**
* @internal Wrapper for mempool_ops alloc callback.
*
--
2.14.1
