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4415a0319f
Instead of reallocating and mapping pages for RX data-path, recycle already used pages in a per ring cache. Performance tests: The following results were measured on a freshly booted system, giving optimal baseline performance, as high-order pages are yet to be fragmented and depleted. We ran pktgen single-stream benchmarks, with iptables-raw-drop: Single stride, 64 bytes: * 4,739,057 - baseline * 4,749,550 - order0 no cache * 4,786,899 - order0 with cache 1% gain Larger packets, no page cross, 1024 bytes: * 3,982,361 - baseline * 3,845,682 - order0 no cache * 4,127,852 - order0 with cache 3.7% gain Larger packets, every 3rd packet crosses a page, 1500 bytes: * 3,731,189 - baseline * 3,579,414 - order0 no cache * 3,931,708 - order0 with cache 5.4% gain Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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