Commit a4d3c540 authored Sep 27, 2006 by Jesse Brandeburg Committed by Auke Kok Sep 27, 2006

ixgb: combine more rx descriptors to improve performance



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>

parent 793fab72

drivers/net/ixgb/ixgb.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)))