At some point, the transmit descriptor chain end interrupt (TXDCEINT)
was turned on. This is a mistake; and it damages small packet
transmit performance, as it results in a huge storm of interrupts.
Turn it off.
Signed-off-by: Linas Vepstas <[EMAIL PROTECTED]>
----
drivers/net/spider_net.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Index: linux-2.6.22-rc1/drivers/net/spider_net.h
===================================================================
--- linux-2.6.22-rc1.orig/drivers/net/spider_net.h 2007-06-08
17:40:02.000000000 -0500
+++ linux-2.6.22-rc1/drivers/net/spider_net.h 2007-06-08 17:40:05.000000000
-0500
@@ -222,6 +222,7 @@ extern char spider_net_driver_name[];
#define SPIDER_NET_GDTBSTA 0x00000300
#define SPIDER_NET_GDTDCEIDIS 0x00000002
#define SPIDER_NET_DMA_TX_VALUE SPIDER_NET_TX_DMA_EN | \
+ SPIDER_NET_GDTDCEIDIS | \
SPIDER_NET_GDTBSTA
#define SPIDER_NET_DMA_TX_FEND_VALUE 0x00030003
@@ -332,8 +333,7 @@ enum spider_net_int2_status {
SPIDER_NET_GRISPDNGINT
};
-#define SPIDER_NET_TXINT ( (1 << SPIDER_NET_GDTFDCINT) | \
- (1 << SPIDER_NET_GDTDCEINT) )
+#define SPIDER_NET_TXINT (1 << SPIDER_NET_GDTFDCINT)
/* We rely on flagged descriptor interrupts */
#define SPIDER_NET_RXINT ( (1 << SPIDER_NET_GDAFDCINT) )
-
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