+
+Below is an example of using Intel PT with autofdo. It requires autofdo
+(https://github.com/google/autofdo) and gcc version 5. The bubble
+sort example is from the AutoFDO tutorial (https://gcc.gnu.org/wiki/AutoFDO/Tutorial)
+amended to take the number of elements as a parameter.
+
+ $ gcc-5 -O3 sort.c -o sort_optimized
+ $ ./sort_optimized 30000
+ Bubble sorting array of 30000 elements
+ 2254 ms
+
+ $ cat ~/.perfconfig
+ [intel-pt]
+ mispred-all
+
+ $ perf record -e intel_pt//u ./sort 3000
+ Bubble sorting array of 3000 elements
+ 58 ms
+ [ perf record: Woken up 2 times to write data ]
+ [ perf record: Captured and wrote 3.939 MB perf.data ]
+ $ perf inject -i perf.data -o inj --itrace=i100usle --strip
+ $ ./create_gcov --binary=./sort --profile=inj --gcov=sort.gcov -gcov_version=1
+ $ gcc-5 -O3 -fauto-profile=sort.gcov sort.c -o sort_autofdo
+ $ ./sort_autofdo 30000
+ Bubble sorting array of 30000 elements
+ 2155 ms
+
+Note there is currently no advantage to using Intel PT instead of LBR, but
+that may change in the future if greater use is made of the data.