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Commit d70cd51a authored by Stephen Hemminger's avatar Stephen Hemminger Committed by Jeff Garzik
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[PATCH] sky2: prefetch tuning 



Add a couple more prefetches to where we walk the rings.

Signed-off-by: default avatarStephen Hemminger <shemminger@osdl.org>
Signed-off-by: default avatarJeff Garzik <jgarzik@pobox.com>
parent 8c463ef7

drivers/net/sky2.c

+3 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ 
#include <linux/delay.h>

#include <linux/workqueue.h>

#include <linux/if_vlan.h>

#include <linux/prefetch.h>

#include <linux/mii.h>



#include <asm/irq.h>
@@ -1248,6 +1249,7 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done) 


  		nxt = re->idx;

		BUG_ON(nxt >= TX_RING_SIZE);

		prefetch(sky2->tx_ring + nxt);



		/* Check for partial status */

		if (tx_dist(put, done) < tx_dist(put, nxt))
@@ -1659,6 +1661,7 @@ static struct sk_buff *sky2_receive(struct sky2_port *sky2, 
		       sky2->netdev->name, sky2->rx_next, status, length);



	sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending;

	prefetch(sky2->rx_ring + sky2->rx_next);



	if (status & GMR_FS_ANY_ERR)

		goto error;