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| author | Nick Nunley <nicholasx.d.nunley@intel.com> | 2010-02-17 01:05:56 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-17 13:21:39 -0800 |
| commit | 58fd62f525e1182fbb2f7566aecb4545720d9aad (patch) | |
| tree | 50221de0473a8ebe0bf5af0fef56e370aa7c1243 /drivers/net/igb | |
| parent | fe0592b4be0ce362e87cefd4f6dbf12cb5704d1b (diff) | |
| download | linux-58fd62f525e1182fbb2f7566aecb4545720d9aad.tar.gz linux-58fd62f525e1182fbb2f7566aecb4545720d9aad.tar.bz2 linux-58fd62f525e1182fbb2f7566aecb4545720d9aad.zip | |
igb: change descriptor control thresholds
This change simplifies the code by setting RX_PTHRESH to 8 for
all devices, as it was unlikely that there was any advantage to
set it at 16 for earlier cards. Additionally TX_WTHRESH is
set to 1 for the 82576 NIC to improve performance by enabling
a minimal amount of write combining when writing back descriptors.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/igb')
| -rw-r--r-- | drivers/net/igb/igb.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h index 7854b66648c7..a1775705b24c 100644 --- a/drivers/net/igb/igb.h +++ b/drivers/net/igb/igb.h @@ -95,13 +95,13 @@ struct vf_data_storage { * descriptors until either it has this many to write back, or the * ITR timer expires. */ -#define IGB_RX_PTHRESH (hw->mac.type <= e1000_82576 ? 16 : 8) +#define IGB_RX_PTHRESH 8 #define IGB_RX_HTHRESH 8 #define IGB_RX_WTHRESH 1 #define IGB_TX_PTHRESH 8 #define IGB_TX_HTHRESH 1 #define IGB_TX_WTHRESH ((hw->mac.type == e1000_82576 && \ - adapter->msix_entries) ? 0 : 16) + adapter->msix_entries) ? 1 : 16) /* this is the size past which hardware will drop packets when setting LPE=0 */ #define MAXIMUM_ETHERNET_VLAN_SIZE 1522 |