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ag71xx: Reduce NAPI weight to 32. 

Qualcomm claims this reduces cache misses. Original commit message below:

From: Ben Menchaca <ben.menchaca@qca.qualcomm.com>
Date: Tue, 11 Jun 2013 12:18:46 -0500
Subject: [ag71xx] reduce NAPI weight

In an attempt to increase our cache warmth, we are decreasing NAPI.
This increases the warmth of the reused SKBs.

Signed-off-by: Ben Menchaca <ben.menchaca@qca.qualcomm.com>
Signed-off-by: Rosen Penev <rosenp@gmail.com>
owl
Rosen Penev 2017-12-04 11:40:22 -08:00 committed by Felix Fietkau
parent 524d103e7e
commit 1c2fdfbaf2
1 changed files with 6 additions and 1 deletions
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7
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h
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@ -40,7 +40,12 @@
#define AG71XX_DRV_NAME "ag71xx"
#define AG71XX_DRV_VERSION "0.5.35"
#define AG71XX_NAPI_WEIGHT 64
/*
* For our NAPI weight bigger does *NOT* mean better - it means more
* D-cache misses and lots more wasted cycles than we'll ever
* possibly gain from saving instructions.
*/
#define AG71XX_NAPI_WEIGHT 32
#define AG71XX_OOM_REFILL (1 + HZ/10)
#define AG71XX_INT_ERR (AG71XX_INT_RX_BE | AG71XX_INT_TX_BE)