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The interface only supports 1 Tx queue so locking is introduced on the Tx queue if XDP is enabled to make sure .ndo_start_xmit and .ndo_xdp_xmit won't corrupt Tx ring - Performance (SMMU off) Benchmark XDP_SKB XDP_DRV xdp1 291kpps 344kpps rxdrop 282kpps 342kpps - Performance (SMMU on) Benchmark XDP_SKB XDP_DRV xdp1 167kpps 324kpps rxdrop 164kpps 323kpps Signed-off-by: Ilias Apalodimas <[email protected]> Acked-by: Jesper Dangaard Brouer <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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