diff mbox series

[v2,5/7] net/qede: prefetch hardware consumer

Message ID 3aed2588b66f2b584237bf6037d71e8b4c791d3e.1616754844.git.bnemeth@redhat.com (mailing list archive)
State Accepted, archived
Delegated to: Jerin Jacob
Headers
Series Optimize qede use of Rx/Tx entries |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Balazs Nemeth March 26, 2021, 11:01 a.m. UTC 
  Ensure that, while ecore_chain_get_cons_idx is running, txq->hw_cons_ptr
is prefetched. This shows a slight performance improvement.

Signed-off-by: Balazs Nemeth <bnemeth@redhat.com>
Reviewed-by: Igor Russkikh <irusskikh@marvell.com>
---
 drivers/net/qede/qede_rxtx.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/net/qede/qede_rxtx.c b/drivers/net/qede/qede_rxtx.c
index f439ee056..4f58abfbf 100644
--- a/drivers/net/qede/qede_rxtx.c
+++ b/drivers/net/qede/qede_rxtx.c
@@ -896,6 +896,7 @@  qede_process_tx_compl(__rte_unused struct ecore_dev *edev,
 	uint16_t first_idx;
 
 	rte_compiler_barrier();
+	rte_prefetch0(txq->hw_cons_ptr);
 	sw_tx_cons = ecore_chain_get_cons_idx(&txq->tx_pbl);
 	hw_bd_cons = rte_le_to_cpu_16(*txq->hw_cons_ptr);
 #ifdef RTE_LIBRTE_QEDE_DEBUG_TX