Re: [Qemu-devel] [RFC 00/10] MultiThread TCG.

["Alex Bennée" <alex.bennee@linaro.org>]

fred.konrad@greensocs.com writes:

> From: KONRAD Frederic <fred.konrad@greensocs.com>
>
> Hi everybody,
>
> This is the start of our work on TCG multithread.

It's been a while since the first RFC are we likely to see a v2 of the
patch series any time soon?

>
> We send it for comment to be sure we are taking the right direction.
> We already discussed the first patch but we keep it for simplicity.
>
> We choice to keep a common tbs array for all VCPU but protect it with the
> tb_lock from TBContext. Then for each PageDesc we have a tb list per VCPU.
>
> Known issues:
>   * Some random deadlock.
>   * qemu_pause_cond is broken we can't quit QEMU.
>   * tb_flush is broken we must make sure no VCPU are executing code.
>
> Jan Kiszka (1):
>   Drop global lock during TCG code execution
>
> KONRAD Frederic (9):
>   target-arm: protect cpu_exclusive_*.
>   use a different translation block list for each cpu.
>   replace spinlock by QemuMutex.
>   remove unused spinlock.
>   extract TBContext from TCGContext.
>   protect TBContext with tb_lock.
>   tcg: remove tcg_halt_cond global variable.
>   cpu: remove exit_request global.
>   tcg: switch on multithread.
>
>  cpu-exec.c                |  47 +++++++----
>  cpus.c                    | 122 +++++++++++----------------
>  cputlb.c                  |   5 ++
>  exec.c                    |  25 ++++++
>  include/exec/exec-all.h   |   4 +-
>  include/exec/spinlock.h   |  49 -----------
>  include/qom/cpu.h         |   1 +
>  linux-user/main.c         |   6 +-
>  scripts/checkpatch.pl     |   9 +-
>  softmmu_template.h        |   6 ++
>  target-arm/cpu.c          |  14 ++++
>  target-arm/cpu.h          |   3 +
>  target-arm/helper.h       |   3 +
>  target-arm/op_helper.c    |  10 +++
>  target-arm/translate.c    |   6 ++
>  target-i386/mem_helper.c  |  16 +++-
>  target-i386/misc_helper.c |  27 +++++-
>  tcg/i386/tcg-target.c     |   8 ++
>  tcg/tcg.h                 |   3 +-
>  translate-all.c           | 208 +++++++++++++++++++++++++++-------------------
>  vl.c                      |   6 ++
>  21 files changed, 335 insertions(+), 243 deletions(-)
>  delete mode 100644 include/exec/spinlock.h

-- 
Alex Bennée