[Qemu-devel] [PATCH v4 0/7] Measure Tiny Code Generation Quality

[vandersonmr]

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. 

vandersonmr (7):
  accel: introducing TBStatistics structure
  accel: collecting TB execution count
  accel: collecting JIT statistics
  accel: replacing part of CONFIG_PROFILER with TBStats
  log: adding -d tb_stats to control tbstats
  monitor: adding tb_stats hmp command
  monitor: adding info tbs, tb, and coverset

 accel/tcg/Makefile.objs      |   2 +-
 accel/tcg/tb-stats.c         | 489 +++++++++++++++++++++++++++++++++++
 accel/tcg/tcg-runtime.c      |   7 +
 accel/tcg/tcg-runtime.h      |   2 +
 accel/tcg/translate-all.c    |  93 ++++++-
 accel/tcg/translator.c       |   6 +
 disas.c                      | 108 ++++++++
 hmp-commands-info.hx         |  23 ++
 hmp-commands.hx              |  17 ++
 include/disas/disas.h        |   1 +
 include/exec/exec-all.h      |  15 +-
 include/exec/gen-icount.h    |   9 +
 include/exec/tb-context.h    |  12 +
 include/exec/tb-hash.h       |   7 +
 include/exec/tb-stats.h      | 113 ++++++++
 include/qemu/log-for-trace.h |   2 +
 include/qemu/log.h           |  16 ++
 linux-user/exit.c            |   4 +
 monitor/misc.c               | 111 ++++++++
 tcg/tcg.c                    | 114 +++-----
 tcg/tcg.h                    |  12 +-
 util/log.c                   |  99 ++++++-
 22 files changed, 1144 insertions(+), 118 deletions(-)
 create mode 100644 accel/tcg/tb-stats.c
 create mode 100644 include/exec/tb-stats.h

-- 
2.22.0