This patchset contains XDP micro optimizations for the redirect core.
These are not functional changes. The optimizations revolve around
getting the compiler to layout the code in a way that reflect how XDP
redirect is used.
Today the compiler chooses to inline and uninline (static C functions)
in a suboptimal way, compared to how XDP redirect can be used. Perf
top clearly shows that almost everything gets inlined into the
function call xdp_do_redirect.
The way the compiler chooses to inlines, does not reflect how XDP
redirect is used, as the compile cannot know this.
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Jesper Dangaard Brouer (3):
xdp: unlikely instrumentation for xdp map redirect
xdp: explicit inline __xdp_map_lookup_elem
xdp: split code for map vs non-map redirect
net/core/filter.c | 64 ++++++++++++++++++++++++++++++-----------------------
1 file changed, 36 insertions(+), 28 deletions(-)
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