This patch is part of Google Summer of Code (GSoC) 2019. More about the project can be found in: https://wiki.qemu.org/Internships/ProjectIdeas/TCGCodeQuality
The goal of this patch is to add infrastructure to collect execution and JIT statistics during the emulation with accel/TCG. The statistics are stored in TBStatistic structures (TBStats) with each TB having its respective TBStats. We added -d tb_stats and HMP tb_stats commands to allow the control of this statistics collection. And info tb, tbs, and coverset commands were also added to allow dumping and exploring all this information while emulating. Collecting these statistics and information is useful to understand qemu performance and to help to add the support for traces to QEMU. v7: - rebase - adding license to new files - applying comments from v6 v6: - applying comments from V5. - change info tbs to info tb-list - fix crash when dumping tb's targets - fix "liveness/code time" calculation v5: - full replacement of CONFIG_PROFILER - several fixes - adds "info cfg" - adds TB's targets to dump vandersonmr (10): accel: collecting TB execution count accel: collecting JIT statistics accel: replacing part of CONFIG_PROFILER with TBStats accel: adding TB_JIT_TIME and full replacing CONFIG_PROFILER Adding -d tb_stats to control TBStatistics collection: monitor: adding tb_stats hmp command Adding tb_stats [start|pause|stop|filter] command to hmp. Adding info [tb-list|tb|coverset] commands to HMP. monitor: adding new info cfg command linux-user: dumping hot TBs at the end of the execution accel/tcg/cpu-exec.c | 4 + accel/tcg/tb-stats.c | 831 ++++++++++++++++++++++++++++++++++ accel/tcg/tcg-runtime.c | 7 + accel/tcg/tcg-runtime.h | 2 + accel/tcg/translate-all.c | 77 ++-- accel/tcg/translator.c | 5 + configure | 3 - cpus.c | 14 +- disas.c | 31 +- hmp-commands-info.hx | 31 ++ hmp-commands.hx | 17 + include/exec/gen-icount.h | 10 + include/exec/tb-stats-flags.h | 43 ++ include/exec/tb-stats.h | 109 ++++- include/qemu/log-for-trace.h | 4 + include/qemu/log.h | 3 + include/qemu/timer.h | 5 +- linux-user/exit.c | 4 + monitor/misc.c | 171 ++++++- tcg/tcg.c | 230 +++------- tcg/tcg.h | 22 +- util/log.c | 88 +++- vl.c | 8 +- 23 files changed, 1443 insertions(+), 276 deletions(-) create mode 100644 include/exec/tb-stats-flags.h -- 2.22.0
