• Andy Zhou's avatar
    openvswitch: optimize flow compare and mask functions · 5828cd9a
    Andy Zhou authored
    Make sure the sw_flow_key structure and valid mask boundaries are always
    machine word aligned. Optimize the flow compare and mask operations
    using machine word size operations. This patch improves throughput on
    average by 15% when CPU is the bottleneck of forwarding packets.
    
    This patch is inspired by ideas and code from a patch submitted by Peter
    Klausler titled "replace memcmp() with specialized comparator".
    However, The original patch only optimizes for architectures
    support unaligned machine word access. This patch optimizes for all
    architectures.
    Signed-off-by: default avatarAndy Zhou <azhou@nicira.com>
    Signed-off-by: default avatarJesse Gross <jesse@nicira.com>
    5828cd9a
flow.c 54.8 KB