diff --git a/config.mk b/config.mk
index 30c95c7..9cf51d0 100644
--- a/config.mk
+++ b/config.mk
@@ -1,7 +1,7 @@
 # Supported: GCC, CLANG, ICC
 TAG ?= GCC
 DATA_TYPE ?= SP#SP or DP
-DATA_LAYOUT ?= AOS#AOS or SOA
+DATA_LAYOUT ?= SoA#AOS or SOA
 
 #Feature options
 OPTIONS +=  -DALIGNMENT=64
diff --git a/include_GCC.mk b/include_GCC.mk
index 9dd536a..d29cca9 100644
--- a/include_GCC.mk
+++ b/include_GCC.mk
@@ -6,8 +6,8 @@ ANSI_CFLAGS += -std=c99
 ANSI_CFLAGS += -pedantic
 ANSI_CFLAGS += -Wextra
 
-CFLAGS   = -O0 -g  -std=c99 -fargument-noalias
-# CFLAGS   = -O3 -march=znver1  -ffast-math -funroll-loops -fopenmp
+# CFLAGS   = -O0 -g  -std=c99 -fargument-noalias
+CFLAGS   = -O3 -march=znver1  -ffast-math -funroll-loops # -fopenmp
 ASFLAGS  =  -masm=intel
 LFLAGS   =
 DEFINES  = -D_GNU_SOURCE