From f7b4f98cb0c642d747539980d258343e7882562f Mon Sep 17 00:00:00 2001
From: "Peter W. Draper" <p.w.draper@durham.ac.uk>
Date: Thu, 21 Sep 2023 13:59:07 +0100
Subject: [PATCH] Add ICC Milan optimization and change architecture to
corei7-avx as test show that to be 20% faster for gravity only and the same
speed for hydro.
---
m4/ax_cc_maxopt.m4 | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/m4/ax_cc_maxopt.m4 b/m4/ax_cc_maxopt.m4
index 282668af72..8e33cd869b 100644
--- a/m4/ax_cc_maxopt.m4
+++ b/m4/ax_cc_maxopt.m4
@@ -129,17 +129,21 @@ if test "$ac_test_CFLAGS" != "set"; then
*4?6[[de]]?:*:*:*) icc_flags="-xCORE-AVX2 -xCORE-AVX-I -xAVX -SSE4.2 -xS -xT -xB -xK" ;; # Skylake
*5?6[[56]]?:*:*:*) icc_flags="-xCORE-AVX512 -xCORE-AVX2 -xCORE-AVX-I -xAVX -SSE4.2 -xS -xT -xB -xK" ;; # Skylake-AVX512
*5?67?:*:*:*) icc_flags="-xMIC-AVX512 -xCORE-AVX2 -xCORE-AVX-I -xAVX -SSE4.2 -xS -xT -xB -xK" ;; # Knights-Landing
- *8?6[[de]]?:*:*:*|*9?6[[de]]?:*:*:*) icc_flags="-xCORE-AVX2 -xCORE-AVX-I -xAVX -SSE4.2 -xS -xT -xB -xK" ;;# Kabylake
+ *8?6[[de]]?:*:*:*|*9?6[[de]]?:*:*:*) icc_flags="-xCORE-AVX2 -xCORE-AVX-I -xAVX -SSE4.2 -xS -xT -xB -xK" ;;# Kabylake
*000?f[[346]]?:*:*:*|?f[[346]]?:*:*:*|f[[346]]?:*:*:*) icc_flags="-xSSE3 -xP -xO -xN -xW -xK" ;;
*00??f??:*:*:*|??f??:*:*:*|?f??:*:*:*|f??:*:*:*) icc_flags="-xSSE2 -xN -xW -xK" ;;
esac ;;
*:68747541:444d4163:69746e65) # AMDs with AVX2 support.
+ # SWIFT gravity prefers AVX so
+ # we used corei7-avx not core-avx2
case $ax_cv_gcc_x86_cpuid_1 in
- *061?f??:*:*:*|61?f??:*:*:*) icc_flags="-march=core-avx2" ;;
- *06??f??:*:*:*|6??f??:*:*:*) icc_flags="-march=core-avx2" ;;
- *070?f??:*:*:*|70?f??:*:*:*) icc_flags="-march=core-avx2" ;;
- 83?f??:*:*:*) icc_flags="-march=core-avx2"
- CFLAGS="$CFLAGS -fma -ftz -fomit-frame-pointer";; # EPYC
+ *061?f??:*:*:*|61?f??:*:*:*) icc_flags="-march=corei7-avx" ;;
+ *06??f??:*:*:*|6??f??:*:*:*) icc_flags="-march=corei7-avx" ;;
+ *070?f??:*:*:*|70?f??:*:*:*) icc_flags="-march=corei7-avx" ;;
+ 83?f??:*:*:*) icc_flags="-march=corei7-avx"
+ CFLAGS="$CFLAGS -fma -ftz -fomit-frame-pointer";; # EPYC ROME
+ a0?f??:*:*:*) icc_flags="-march=corei7-avx"
+ CFLAGS="$CFLAGS -fma -ftz -fomit-frame-pointer";; # MILAN
esac ;;
esac ;;
esac
--
GitLab