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[PATCH] sky2: prefetch tuning

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

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Stephen Hemminger 2005-12-09 11:35:09 -08:00 committed by Jeff Garzik
parent 8c463ef792
commit d70cd51ac0
1 changed files with 3 additions and 0 deletions
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3
drivers/net/sky2.c
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@ -45,6 +45,7 @@
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/workqueue.h> #include <linux/workqueue.h>
#include <linux/if_vlan.h> #include <linux/if_vlan.h>
#include <linux/prefetch.h>
#include <linux/mii.h> #include <linux/mii.h>
#include <asm/irq.h> #include <asm/irq.h>
@ -1248,6 +1249,7 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
nxt = re->idx; nxt = re->idx;
BUG_ON(nxt >= TX_RING_SIZE); BUG_ON(nxt >= TX_RING_SIZE);
prefetch(sky2->tx_ring + nxt);
/* Check for partial status */ /* Check for partial status */
if (tx_dist(put, done) < tx_dist(put, nxt)) 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->netdev->name, sky2->rx_next, status, length);
sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending; sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending;
prefetch(sky2->rx_ring + sky2->rx_next);
if (status & GMR_FS_ANY_ERR) if (status & GMR_FS_ANY_ERR)
goto error; goto error;