build: modify N_PREFETCH on Arm N2 to achieve best perf

[vpp.git] / src / cmake / cpu.cmake

diff --git a/src/cmake/cpu.cmake b/src/cmake/cpu.cmake
index 69f83c9..18a1210 100644 (file)
--- a/src/cmake/cpu.cmake
+++ b/src/cmake/cpu.cmake
@@ -194,6 +194,12 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
     N_PREFETCHES 6
     CACHE_PREFETCH_BYTES 64
   )
+  add_vpp_march_variant(neoversen2
+    FLAGS -march=armv9-a+crypto -mtune=neoverse-n2
+    N_PREFETCHES 6
+    CACHE_PREFETCH_BYTES 64
+    OFF
+  )
 endif()
 
 macro(vpp_library_set_multiarch_sources lib)