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authorDivy Le Ray <divy@chelsio.com>2009-03-12 21:13:59 +0000
committerDavid S. Miller <davem@davemloft.net>2009-03-13 11:30:44 -0700
commitb2b964f0647c5156038834dd879f90442e33f2a5 (patch)
treee6eb3bbd6dc3e3e5fb3684350ef64574b10162bf
parent8f4358044d7d694f2e0c18a6ce5db6ec0790451a (diff)
cxgb3: prefetch buffer access in GRO mode
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>
-rw-r--r--drivers/net/cxgb3/sge.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index 90f6f82d3bf2..a482429846eb 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -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),
fl->buf_size, PCI_DMA_FROMDEVICE);
+ prefetch(&qs->lro_frag_tbl);
+
rx_frag += nr_frags;
rx_frag->page = sd->pg_chunk.page;
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));
mod_timer(&q->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD);
+
return 0;
err_unlock: