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cxgb3: prefetch buffer access in GRO mode

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Elmininate a cache miss when accessing the CPL header within
the first aggregated buffer.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Divy Le Ray
2009-03-12 21:13:59 +00:00
committed by David S. Miller
parent 8f4358044d
commit b2b964f064
1 changed files with 3 additions and 0 deletions
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3
drivers/net/cxgb3/sge.c
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@@ -2029,6 +2029,8 @@ static void lro_add_page(struct adapter *adap, struct sge_qset *qs,
pci_unmap_single(adap->pdev, pci_unmap_addr(sd, dma_addr), pci_unmap_single(adap->pdev, pci_unmap_addr(sd, dma_addr),
fl->buf_size, PCI_DMA_FROMDEVICE); fl->buf_size, PCI_DMA_FROMDEVICE);
prefetch(&qs->lro_frag_tbl);
rx_frag += nr_frags; rx_frag += nr_frags;
rx_frag->page = sd->pg_chunk.page; rx_frag->page = sd->pg_chunk.page;
rx_frag->page_offset = sd->pg_chunk.offset + offset; rx_frag->page_offset = sd->pg_chunk.offset + offset;
@@ -2997,6 +2999,7 @@ int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
V_NEWTIMER(q->rspq.holdoff_tmr)); V_NEWTIMER(q->rspq.holdoff_tmr));
mod_timer(&q->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD); mod_timer(&q->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD);
return 0; return 0;
err_unlock: err_unlock: