[dpdk-dev] [PATCH] ethdev: make struct rte_eth_dev cache aligned

[Jerin Jacob]

Elements of struct rte_eth_dev used in the fast path.
Make struct rte_eth_dev cache aligned to avoid the cases where
rte_eth_dev elements share the same cache line with other structures.

Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
---
 lib/librte_ether/rte_ethdev.c | 2 +-
 lib/librte_ether/rte_ethdev.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index a31018e..04f492d 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -70,7 +70,7 @@
 #include "rte_ethdev.h"

 static const char *MZ_RTE_ETH_DEV_DATA = "rte_eth_dev_data";
-struct rte_eth_dev rte_eth_devices[RTE_MAX_ETHPORTS];
+struct rte_eth_dev rte_eth_devices[RTE_MAX_ETHPORTS] __rte_cache_aligned;
 static struct rte_eth_dev_data *rte_eth_dev_data;
 static uint8_t nb_ports;

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 8519ff6..e359dda 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1630,7 +1630,7 @@ struct rte_eth_dev {
        struct rte_eth_rxtx_callback *pre_tx_burst_cbs[RTE_MAX_QUEUES_PER_PORT];
        uint8_t attached; /**< Flag indicating the port is attached */
        enum rte_eth_dev_type dev_type; /**< Flag indicating the device type */
-};
+} __rte_cache_aligned;

 struct rte_eth_dev_sriov {
        uint8_t active;               /**< SRIOV is active with 16, 32 or 64 
pools */
-- 
2.1.0