[PATCH v4 22/35] net/intel: mark mid-burst ring cleanup as unlikely

Bruce Richardson
2026-02-09T16:48:24Z

It should rarely be the case that we need to cleanup the descriptor ring
mid-burst, so mark as unlikely to help performance.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
drivers/net/intel/common/tx_scalar.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/intel/common/tx_scalar.h b/drivers/net/intel/common/tx_scalar.h
index 3e54cd7607..cee8f11c7f 100644
--- a/drivers/net/intel/common/tx_scalar.h
+++ b/drivers/net/intel/common/tx_scalar.h
@@ -266,7 +266,7 @@ ci_xmit_pkts(struct ci_tx_queue *txq,
if (tx_last >= txq->nb_tx_desc)
tx_last = (uint16_t)(tx_last - txq->nb_tx_desc);

- if (nb_used > txq->nb_tx_free) {
+ if (unlikely(nb_used > txq->nb_tx_free)) {
if (ci_tx_xmit_cleanup(txq) != 0) {
if (nb_tx == 0)
return 0;
--
2.51.0