From: Rosen Penev Date: Mon, 4 Dec 2017 19:40:22 +0000 (-0800) Subject: ag71xx: Reduce NAPI weight to 32. X-Git-Tag: v18.06.0-rc1~1613 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1c2fdfbaf2fac968706a6fe8ac85af3ba4f27239;p=openwrt%2Fopenwrt.git ag71xx: Reduce NAPI weight to 32. Qualcomm claims this reduces cache misses. Original commit message below: From: Ben Menchaca 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 Signed-off-by: Rosen Penev --- diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h index 898bde1d25..a712812916 100644 --- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h +++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h @@ -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)