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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>
This commit is contained in:
Ayaz Abdulla 2009-03-05 08:02:30 +00:00 committed by David S. Miller
parent 4145ade2bb
commit 6cef67a02f
1 changed files with 2 additions and 2 deletions
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4
drivers/net/forcedeth.c
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@ -128,7 +128,7 @@ enum {
* NVREG_POLL_DEFAULT=97 would result in an interval length of 1 ms * NVREG_POLL_DEFAULT=97 would result in an interval length of 1 ms
*/ */
NvRegPollingInterval = 0x00c, 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 #define NVREG_POLL_DEFAULT_CPU 13
NvRegMSIMap0 = 0x020, NvRegMSIMap0 = 0x020,
NvRegMSIMap1 = 0x024, NvRegMSIMap1 = 0x024,
@ -463,7 +463,7 @@ union ring_type {
/* General driver defaults */ /* General driver defaults */
#define NV_WATCHDOG_TIMEO (5*HZ) #define NV_WATCHDOG_TIMEO (5*HZ)
#define RX_RING_DEFAULT 128 #define RX_RING_DEFAULT 512
#define TX_RING_DEFAULT 256 #define TX_RING_DEFAULT 256
#define RX_RING_MIN 128 #define RX_RING_MIN 128
#define TX_RING_MIN 64 #define TX_RING_MIN 64