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authorAuke Kok <auke-jan.h.kok@intel.com>2006-04-14 22:05:18 -0400
committerAuke Kok <auke-jan.h.kok@intel.com>2006-04-14 22:05:18 -0400
commit9e2feace1acd38d7a3b1275f7f9f8a397d09040e (patch)
tree109e9bae993df91e2ff83ce7b4fccba9498d0273 /drivers/net/e1000/e1000.h
parent6fc7a7eca70780dc1539ce68a6513f9b11891f3c (diff)
e1000: Buffer optimizations for small MTU
Remove multi-descriptor support from legacy recieve path Add memory usage efficiency by using more correct size descriptors for small MTU sizes and optimize using LPE for <= 1522 byte frame sizes An extra performance fix that effected our TCP window size growth as a receiver. Set our initial buffer to be 128 bytes instead of 256 to prevent over-socket charge when truesize is computed in the stack. old way: truesize = 256 + l1 = 256 + 1460 = 1716 new way: truesize = 128 + l1 = 128 + 1460 = 1588 The magic value that we can't cross is 1648. Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com> Signed-off-by: John Ronciak <john.ronciak@intel.com>
Diffstat (limited to 'drivers/net/e1000/e1000.h')
-rw-r--r--drivers/net/e1000/e1000.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index 764808f3702e..2dfabdb29e7b 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -114,6 +114,8 @@ struct e1000_adapter;
114/* Supported Rx Buffer Sizes */ 114/* Supported Rx Buffer Sizes */
115#define E1000_RXBUFFER_128 128 /* Used for packet split */ 115#define E1000_RXBUFFER_128 128 /* Used for packet split */
116#define E1000_RXBUFFER_256 256 /* Used for packet split */ 116#define E1000_RXBUFFER_256 256 /* Used for packet split */
117#define E1000_RXBUFFER_512 512
118#define E1000_RXBUFFER_1024 1024
117#define E1000_RXBUFFER_2048 2048 119#define E1000_RXBUFFER_2048 2048
118#define E1000_RXBUFFER_4096 4096 120#define E1000_RXBUFFER_4096 4096
119#define E1000_RXBUFFER_8192 8192 121#define E1000_RXBUFFER_8192 8192