passt/arch.h, branch 2023_03_21.1ee2f7c Plug A Simple Socket Transport treewide: Add include guards 2022-03-29T13:35:38+00:00 Stefano Brivio sbrivio@redhat.com 2022-03-25T23:05:31+00:00 965f603238a92b6ab8cd8a0592e0fb65c096b3e1 ...at the moment, just for consistency with packet.h, icmp.h, tcp.h and udp.h. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> 
...at the moment, just for consistency with packet.h, icmp.h,
tcp.h and udp.h.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
passt, pasta: Run-time selection of AVX2 build 2022-02-28T15:46:28+00:00 Stefano Brivio sbrivio@redhat.com 2022-02-28T15:18:44+00:00 213c397492bdc64cf26b2e7b3877e4a29dc9f8da Build-time selection of AVX2 flags and routines is not practical for distributions, but limiting AVX2 usage to checksum routines with specific run-time detection doesn't allow for easy performance gains from auto-vectorisation of batched packet handling routines. For x86_64, build non-AVX2 and AVX2 binaries, and implement a simple wrapper replacing the current executable with the AVX2 build if it's available, and if AVX2 is supported by the current CPU. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> 
Build-time selection of AVX2 flags and routines is not practical for
distributions, but limiting AVX2 usage to checksum routines with
specific run-time detection doesn't allow for easy performance gains
from auto-vectorisation of batched packet handling routines.

For x86_64, build non-AVX2 and AVX2 binaries, and implement a simple
wrapper replacing the current executable with the AVX2 build if it's
available, and if AVX2 is supported by the current CPU.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>