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[PATCH] spidernet: poor network performance 

Correct a problem seen on later kernels running the NetPIPE application.
Specifically, NetPIPE would begin running very slowly at the 1533 packet
size.  It was determined that Spidernet slowed with an idle DMA engine.

Signed-off-by: James K Lewis <jklewis@us.ibm.com>
Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Linas Vepstas 2006-11-17 14:39:40 -08:00 committed by Jeff Garzik
parent 9c434f5e21
commit 7bd54c8636
2 changed files with 5 additions and 5 deletions
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2
drivers/net/spider_net.c
View File

@ -1633,7 +1633,7 @@ spider_net_enable_card(struct spider_net_card *card)
SPIDER_NET_INT2_MASK_VALUE);
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
SPIDER_NET_GDTBSTA | SPIDER_NET_GDTDCEIDIS);
SPIDER_NET_GDTBSTA);
}
/**

8
drivers/net/spider_net.h
View File

@ -24,7 +24,7 @@
#ifndef _SPIDER_NET_H
#define _SPIDER_NET_H
#define VERSION "1.5 A"
#define VERSION "1.6 A"
#include "sungem_phy.h"
@ -217,8 +217,7 @@ 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_GDTBSTA | \
SPIDER_NET_GDTDCEIDIS
SPIDER_NET_GDTBSTA
#define SPIDER_NET_DMA_TX_FEND_VALUE 0x00030003
@ -328,7 +327,8 @@ enum spider_net_int2_status {
SPIDER_NET_GRISPDNGINT
};
#define SPIDER_NET_TXINT ( (1 << SPIDER_NET_GDTFDCINT) )
#define SPIDER_NET_TXINT ( (1 << SPIDER_NET_GDTFDCINT) | \
(1 << SPIDER_NET_GDTDCEINT) )
/* We rely on flagged descriptor interrupts */
#define SPIDER_NET_RXINT ( (1 << SPIDER_NET_GDAFDCINT) )