FWIW, the apitrace plays back fine for me on Kaveri, with radeonsi from Mesa Git master built using -fno-math-errno -fno-trapping-math -O3 -fno-omit-frame-pointer -ftree-vectorize -march=amdfam10 -mtune=native for optimization with gcc version 6.3.0 20170415 (Debian 6.3.0-14)