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forcedeth: performance changes

PATCH Applied Ayaz Abdulla 1 participant 1 message Mar 5, 2009

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Ayaz Abdulla

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PATCH 11/13 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 <[email protected]>
drivers/net/forcedeth.c +2 -2
@@ -128,7 +128,7 @@
  * 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 @@
 /* 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