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[PATCH] s390: lcs performance enhancements

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[patch 1/2] s390: lcs performance enhancements

From: Klaus Wacker <kdwacker@de.ibm.com>
	- When flood pinging (with large packet size) an LCS device,
	  about 90 % of all packets are dropped by driver.
	- increased number of lcs IO buffers to 32.
	- use netif_stop_queue/netif_wake_queue in lcs_start_xmit routine
	- don't lock the whole xmit routine but just the piece of code where
	  tx_buffer is touched.

Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>

diffstat:
 lcs.c |   31 +++++++++++++++++--------------
 lcs.h |    2 +-
 2 files changed, 18 insertions(+), 15 deletions(-)
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Frank Pavlic
2006-02-07 17:04:36 +01:00
committed by Jeff Garzik
parent ca5b0ec8ae
commit 0d613a27cc
2 changed files with 18 additions and 15 deletions
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2
drivers/s390/net/lcs.h
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@ -95,7 +95,7 @@ do { \
*/
#define LCS_ILLEGAL_OFFSET 0xffff
#define LCS_IOBUFFERSIZE 0x5000
#define LCS_NUM_BUFFS 8 /* needs to be power of 2 */
#define LCS_NUM_BUFFS 32 /* needs to be power of 2 */
#define LCS_MAC_LENGTH 6
#define LCS_INVALID_PORT_NO -1
#define LCS_LANCMD_TIMEOUT_DEFAULT 5