forcedeth: performance changes

This patch modifies the throughput mode poll settings to reduce the
number of interrupts. This is only used by older hardware that need a
timer irq in throughput mode.

Secondly, this patch increases the default rx ring from 128 to 512. This
drastically improves bandwidth utilization for small packets sizes i.e
512 bytes.

Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index 341a35117eae937b96b99cb9d9fef37c4ccca917..28fc3357268a7c3a6fa67c9929c94cde87e18e13 100644 (file)
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -128,7 +128,7 @@ enum {
  * NVREG_POLL_DEFAULT=97 would result in an interval length of 1 ms
  */
        NvRegPollingInterval = 0x00c,
-#define NVREG_POLL_DEFAULT_THROUGHPUT  970 /* backup tx cleanup if loop max reached */
+#define NVREG_POLL_DEFAULT_THROUGHPUT  65535 /* backup tx cleanup if loop max reached */
 #define NVREG_POLL_DEFAULT_CPU 13
        NvRegMSIMap0 = 0x020,
        NvRegMSIMap1 = 0x024,
@@ -463,7 +463,7 @@ union ring_type {
 /* General driver defaults */
 #define NV_WATCHDOG_TIMEO      (5*HZ)
 
-#define RX_RING_DEFAULT                128
+#define RX_RING_DEFAULT                512
 #define TX_RING_DEFAULT                256
 #define RX_RING_MIN            128
 #define TX_RING_MIN            64