[dpdk-dev] [PATCH v3 4/4] cache/slow-path: reduce cache align requirement for 128-byte cache targets

Jerin Jacob jerin.jacob at caviumnetworks.com
Mon Dec 14 05:32:56 CET 2015


slow-path data structures need not be 128-byte cache aligned.
Reduce the alignment to 64-byte to save the memory.

No behavior change for 64-byte cache aligned systems as minimum
cache line size as 64.

Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
---
 lib/librte_ether/rte_ethdev.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index bada8ad..4dbf73b 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -863,7 +863,7 @@ struct rte_eth_rxq_info {
 	struct rte_eth_rxconf conf; /**< queue config parameters. */
 	uint8_t scattered_rx;       /**< scattered packets RX supported. */
 	uint16_t nb_desc;           /**< configured number of RXDs. */
-} __rte_cache_aligned;
+} __rte_cache_min_aligned;
 
 /**
  * Ethernet device TX queue information structure.
@@ -872,7 +872,7 @@ struct rte_eth_rxq_info {
 struct rte_eth_txq_info {
 	struct rte_eth_txconf conf; /**< queue config parameters. */
 	uint16_t nb_desc;           /**< configured number of TXDs. */
-} __rte_cache_aligned;
+} __rte_cache_min_aligned;
 
 /** Maximum name length for extended statistics counters */
 #define RTE_ETH_XSTATS_NAME_SIZE 64
-- 
2.1.0



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