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[0/8] plugins/next: bugfixs and iops based time control RFC

Message ID 20230519170454.2353945-1-alex.bennee@linaro.org
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Series plugins/next: bugfixs and iops based time control RFC | expand

Message

Alex Bennée May 19, 2023, 5:04 p.m. UTC 
Hi,

There are a couple of bug fixes in here but also the RFC for exposing
time control to the plugin. Its very rough and ready and I've not done
very many tests on the stability of the time slowing down but reducing
the iops value does seem to at least get reflected in slower dhrystone
scores.

Alex.

Alex Bennée (8):
  plugins: force slow path when plugins instrument memory ops
  plugins: fix memory leak while parsing options
  plugins: update lockstep to use g_memdup2
  sysemu: add set_virtual_time to accel ops
  qtest: use cpu interface in qtest_clock_warp
  sysemu: generalise qtest_warp_clock as qemu_clock_advance_virtual_time
  plugins: add time control API
  contrib/plugins: add iops plugin example for cost modelling

 include/exec/cpu-all.h                        |   2 +-
 include/hw/core/cpu.h                         |  17 ++
 include/qemu/qemu-plugin.h                    |  19 ++
 include/qemu/timer.h                          |  15 +
 include/sysemu/accel-ops.h                    |  18 +-
 include/sysemu/cpu-timers.h                   |   3 +-
 include/sysemu/qtest.h                        |   1 +
 accel/qtest/qtest.c                           |   1 +
 accel/tcg/cputlb.c                            |   4 +-
 accel/tcg/user-exec.c                         |   6 +-
 contrib/plugins/cache.c                       |   2 +-
 contrib/plugins/drcov.c                       |   2 +-
 contrib/plugins/execlog.c                     |   2 +-
 contrib/plugins/hotblocks.c                   |   2 +-
 contrib/plugins/hotpages.c                    |   2 +-
 contrib/plugins/howvec.c                      |   2 +-
 contrib/plugins/hwprofile.c                   |   2 +-
 contrib/plugins/iops.c                        | 260 ++++++++++++++++++
 contrib/plugins/lockstep.c                    |   4 +-
 plugins/api.c                                 |  22 ++
 softmmu/cpus.c                                |  11 +
 softmmu/qtest.c                               |  26 +-
 ...t-virtual-clock.c => cpus-virtual-clock.c} |   5 +
 target/arm/tcg/sve_helper.c                   |   4 -
 tests/plugin/bb.c                             |   2 +-
 tests/plugin/insn.c                           |   2 +-
 tests/plugin/mem.c                            |   2 +-
 tests/plugin/syscall.c                        |   2 +-
 util/qemu-timer.c                             |  26 ++
 contrib/plugins/Makefile                      |   1 +
 plugins/qemu-plugins.symbols                  |   2 +
 stubs/meson.build                             |   2 +-
 tests/tcg/aarch64/Makefile.target             |   8 +
 33 files changed, 433 insertions(+), 46 deletions(-)
 create mode 100644 contrib/plugins/iops.c
 rename stubs/{cpus-get-virtual-clock.c => cpus-virtual-clock.c} (68%)