| Message ID | 1389525848-1814-5-git-send-email-w@1wt.eu |
|---|---|
| State | Changes Requested, archived |
| Delegated to: | David Miller |
| Headers | show |
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index aa3a4f7..c7b37e0 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -611,6 +611,7 @@ mvneta_rxq_next_desc_get(struct mvneta_rx_queue *rxq) int rx_desc = rxq->next_desc_to_proc; rxq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(rxq, rx_desc); + prefetch(rxq->descs + rxq->next_desc_to_proc); return rxq->descs + rx_desc; } @@ -1442,7 +1443,6 @@ static int mvneta_rx(struct mvneta_port *pp, int rx_todo, u32 rx_status; int rx_bytes, err; - prefetch(rx_desc); rx_done++; rx_filled++; rx_status = rx_desc->status;
Currently, the mvneta driver tries to prefetch the current Rx descriptor during read. Tests have shown that prefetching the next one instead increases general performance by about 1% on HTTP traffic. Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Willy Tarreau <w@1wt.eu> --- drivers/net/ethernet/marvell/mvneta.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)