forked from Minki/linux
[PATCH] sky2: prefetch tuning
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>
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@ -45,6 +45,7 @@
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#include <linux/delay.h>
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#include <linux/delay.h>
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#include <linux/workqueue.h>
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#include <linux/workqueue.h>
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#include <linux/if_vlan.h>
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#include <linux/if_vlan.h>
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#include <linux/prefetch.h>
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#include <linux/mii.h>
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#include <linux/mii.h>
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#include <asm/irq.h>
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#include <asm/irq.h>
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@ -1248,6 +1249,7 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
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nxt = re->idx;
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nxt = re->idx;
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BUG_ON(nxt >= TX_RING_SIZE);
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BUG_ON(nxt >= TX_RING_SIZE);
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prefetch(sky2->tx_ring + nxt);
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/* Check for partial status */
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/* Check for partial status */
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if (tx_dist(put, done) < tx_dist(put, nxt))
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if (tx_dist(put, done) < tx_dist(put, nxt))
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@ -1659,6 +1661,7 @@ static struct sk_buff *sky2_receive(struct sky2_port *sky2,
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sky2->netdev->name, sky2->rx_next, status, length);
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sky2->netdev->name, sky2->rx_next, status, length);
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sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending;
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sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending;
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prefetch(sky2->rx_ring + sky2->rx_next);
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if (status & GMR_FS_ANY_ERR)
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if (status & GMR_FS_ANY_ERR)
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goto error;
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goto error;
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