[PATCH 21/23] ixgb: combine more rx descriptors to improve performance
From: Kok, Auke <hidden>
Date: 2006-09-19 17:20:25
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> Signed-off-by: Auke Kok <redacted> --- drivers/net/ixgb/ixgb.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/net/ixgb/ixgb.h b/drivers/net/ixgb/ixgb.h
index a1a7f3b..50ffe90 100644
--- a/drivers/net/ixgb/ixgb.h
+++ b/drivers/net/ixgb/ixgb.h@@ -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)))
--- Auke Kok [off-list ref]