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Since Eric proposed an idea about adding indirect call wrappers for UDP and managed to see a huge improvement[1], the same situation can also be applied in xsk scenario. This patch adds an indirect call for xsk and helps current copy mode improve the performance by around 1% stably which was observed with IXGBE at 10Gb/sec loaded. If the throughput grows, the positive effect will be magnified. I applied this patch on top of batch xmit series[2], and was able to see <5% improvement from our internal application which is a little bit unstable though. Use INDIRECT wrappers to keep xsk_destruct_skb static as it used to be when the mitigation config is off. Be aware of the freeing path that can be very hot since the frequency can reach around 2,000,000 times per second with the xdpsock test. [1]: https://lore.kernel.org/netdev/20251006193103.2684156-2-edumazet@google.com/ [2]: https://lore.kernel.org/all/20251021131209.41491-1-kerneljasonxing@gmail.com/ Suggested-by: Alexander Lobakin <aleksander.lobakin@intel.com> Signed-off-by: Jason Xing <kernelxing@tencent.com> Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com> Link: https://patch.msgid.link/20251031103328.95468-1-kerneljasonxing@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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