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ixgb: combine more rx descriptors to improve performance

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We experimented with more descriptor buffer writebacks and found that
values larger than 8 give HW problems, but 8 is safe and gives us some
improved performance.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
This commit is contained in:
Jesse Brandeburg 2006-09-27 12:54:17 -07:00 committed by Auke Kok
parent 793fab7273
commit a4d3c54024
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ixgb/ixgb.h
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@ -111,7 +111,7 @@ struct ixgb_adapter;
#define IXGB_RXBUFFER_16384 16384
/* How many Rx Buffers do we bundle into one write to the hardware ? */
#define IXGB_RX_BUFFER_WRITE 4 /* Must be power of 2 */
#define IXGB_RX_BUFFER_WRITE 8 /* Must be power of 2 */
/* only works for sizes that are powers of 2 */
#define IXGB_ROUNDUP(i, size) ((i) = (((i) + (size) - 1) & ~((size) - 1)))