mirror of https://gitee.com/openkylin/linux.git
042a53a9e4
skb_dma_unmap() is quite expensive for small packets, because we use two different cache lines from skb_shared_info. One to access nr_frags, one to access dma_maps[0] Instead of dma_maps being an array of MAX_SKB_FRAGS + 1 elements, let dma_head alone in a new dma_head field, close to nr_frags, to reduce cache lines misses. Tested on my dev machine (bnx2 & tg3 adapters), nice speedup ! Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| Makefile | ||
| e1000_82575.c | ||
| e1000_82575.h | ||
| e1000_defines.h | ||
| e1000_hw.h | ||
| e1000_mac.c | ||
| e1000_mac.h | ||
| e1000_mbx.c | ||
| e1000_mbx.h | ||
| e1000_nvm.c | ||
| e1000_nvm.h | ||
| e1000_phy.c | ||
| e1000_phy.h | ||
| e1000_regs.h | ||
| igb.h | ||
| igb_ethtool.c | ||
| igb_main.c | ||