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| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2014-07-26 02:42:39 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2014-09-12 00:30:13 -0700 |
| commit | 15be71c92f10169600b5980ee06836614836057b (patch) | |
| tree | 7314f7631d10bbf8bf797e8cb799bb55da4e2a80 | |
| parent | db99d95c9030b78b85dbdba53a4babb4cd6231be (diff) | |
| download | talos-op-linux-15be71c92f10169600b5980ee06836614836057b.tar.gz talos-op-linux-15be71c92f10169600b5980ee06836614836057b.zip | |
ixgbe: Drop Rx alloc at end of Rx cleanup
This change removes the Rx buffer allocation at the end of ixgbe_clean_rx_irq.
The reason for removing this is to avoid the extra latency introduced by the
MMIO write. This can amount to somewhere around an extra 100ns of latency and
one extra message worth of PCIe bus overhead.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 87613806ee88..6a12bb1d49ca 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -2077,9 +2077,6 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, q_vector->rx.total_packets += total_rx_packets; q_vector->rx.total_bytes += total_rx_bytes; - if (cleaned_count) - ixgbe_alloc_rx_buffers(rx_ring, cleaned_count); - return total_rx_packets; } |
