diff --git a/AMSS_NCKU_source/makefile b/AMSS_NCKU_source/makefile
index 7a746fa..c5750b8 100644
--- a/AMSS_NCKU_source/makefile
+++ b/AMSS_NCKU_source/makefile
@@ -9,9 +9,9 @@ PROFDATA = /home/$(shell whoami)/AMSS-NCKU/pgo_profile/default.profdata
 
 ifeq ($(PGO_MODE),instrument)
 ## Phase 1: instrumentation — omit -ipo/-fp-model fast=2 for faster build and numerical stability
-CXXAPPFLAGS = -O2 -xHost -fma -fprofile-instr-generate \
+CXXAPPFLAGS = -O3 -xHost -fma -fprofile-instr-generate -ipo \
               -Dfortran3 -Dnewc -I${MKLROOT}/include
-f90appflags = -O2 -xHost -fma -fprofile-instr-generate \
+f90appflags = -O3 -xHost -fma -fprofile-instr-generate -ipo \
               -align array64byte -fpp -I${MKLROOT}/include
 else
 ## opt (default): maximum performance with PGO profile data
diff --git a/pgo_profile/default.profdata b/pgo_profile/default.profdata
index 6036a08..156744d 100644
Binary files a/pgo_profile/default.profdata and b/pgo_profile/default.profdata differ
diff --git a/pgo_profile/default_9725923726611433605_0.profraw b/pgo_profile/default_9725923726611433605_0.profraw
index 4ffbddd..e38d300 100644
Binary files a/pgo_profile/default_9725923726611433605_0.profraw and b/pgo_profile/default_9725923726611433605_0.profraw differ