[bpf-next V2 PATCH 0/3] XDP micro optimizations for redirect

[Jesper Dangaard Brouer <brouer@redhat.com>]

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.

---

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(-)