added PGO

.gitignore

@@ -2,4 +2,5 @@
 test*
 obj/
 hexview
+hexview-pgo
 profile/

Makefile

@@ -11,7 +11,18 @@ LDFLAGS+= -lfmt
 PROJ = hexview
 
 OBJ = $(addprefix obj/,$(SRC:.cpp=.o))
-PROF_OBJ = $(addprefix profile/,$(SRC:.cpp=.o))
+
+### PGO target specific ###
+
+# Number of times to run profiling
+PGO_ITERATIONS = 512
+# Size in kb of training files
+PGO_DATASET_SIZE = $$(( 1024 * 4 ))
+
+PGO_OBJ = $(addprefix profile/,$(SRC:.cpp=.o))
+PROF_FLAGS = -fprofile-generate
+
+###
 
 .PHONY: all
 all: dirs $(PROJ)
@@ -24,24 +35,38 @@ obj/%.o: %.cpp
 	$(CXX) -c $< $(_HX_FEAT) $(CXXFLAGS) -o $@ $(LDFLAGS)
 
 profile/%.o: %.cpp
-	$(CXX) -c $< $(_HX_FEAT) $(CXXFLAGS) -fprofile-generate -o $@ $(LDFLAGS)
+	$(CXX) -c $< $(_HX_FEAT) $(CXXFLAGS) $(PROF_FLAGS) -o $@ $(LDFLAGS) $(PROF_FLAGS)
 
 $(PROJ): $(OBJ)
 	$(CXX) $^ $(CXXFLAGS) -o $@ $(LDFLAGS)
 	strip $@
 
-pgo-generate: $(PROF_OBJ)
-	$(CXX) $^ $(CXXFLAGS) -fprofile-generate -o $@ $(LDFLAGS)
+pgo-generate: $(PGO_OBJ)
+	$(CXX) $^ $(CXXFLAGS) $(PROF_FLAGS) -o $@ $(LDFLAGS) $(PROF_FLAGS)
 
-pgo-profile: pgo-generate
-	for i in {1..32}; do \
-		dd if=/dev/urandom of=./pgo-test bs=1024 count=1024 \
-		./pgo-generate ./pgo-test
+pgo-profile: dirs pgo-generate
+	for i in {1..$(PGO_ITERATIONS)}; do \
+		dd if=/dev/urandom of=./pgo-test bs=1024 count=$(PGO_DATASET_SIZE) >> /dev/null 2>&1; \
+		printf "\rIteration $$i / $(PGO_ITERATIONS)"; \
+		./pgo-generate ./pgo-test > ./pgo-output; \
 	done
+	@echo ""
 	rm ./pgo-test
+	rm ./pgo-output
+	rm pgo-generate
+
+
+pgo-use: PROF_FLAGS = -fprofile-use -lgcov
+pgo-use: $(PGO_OBJ)
+	$(CXX) $^ $(CXXFLAGS) $(PROF_FLAGS) -o $@ $(LDFLAGS) $(PROF_FLAGS)
+
+$(PROJ)-pgo: dirs pgo-profile pgo-use
+	mv pgo-use $@
+	strip $@
 
 clean:
 	rm -f $(PROJ)
+	rm -f $(PROJ)-pgo
 	rm -rf obj
 	rm -rf profile
-	rm -f pgo-generate
+	rm -f pgo-{test,output,generate}