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sky2: reduce default transmit ring 

Reduce the size of the driver transmit ring to reduce latency
and allow qdisc to do better rate control.  Also make it
obvious what the minimum transmit ring allowed is and why.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2009-06-17 07:30:37 +00:00 committed by David S. Miller
parent bf15fe996e
commit e9c1be80a7
1 changed files with 2 additions and 2 deletions
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4
drivers/net/sky2.c
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@ -65,9 +65,9 @@
#define RX_DEF_PENDING RX_MAX_PENDING
#define TX_RING_SIZE 512
#define TX_DEF_PENDING (TX_RING_SIZE - 1)
#define TX_MIN_PENDING 64
#define TX_DEF_PENDING 128
#define MAX_SKB_TX_LE (4 + (sizeof(dma_addr_t)/sizeof(u32))*MAX_SKB_FRAGS)
#define TX_MIN_PENDING (MAX_SKB_TX_LE+1)
#define STATUS_RING_SIZE 2048 /* 2 ports * (TX + 2*RX) */
#define STATUS_LE_BYTES (STATUS_RING_SIZE*sizeof(struct sky2_status_le))