Re: [Qemu-devel] [RFC PATCH V2 0/3] Multithread TCG async_safe_work part.

[Frederic Konrad]

On 13/07/2015 13:53, Paolo Bonzini wrote:
> On 10/07/2015 18:08, address@hidden wrote:
> > From: KONRAD Frederic <address@hidden>
> >
> > This is the async_safe_work introduction bit of the Multithread TCG work.
> > Rebased on current upstream (6169b60285fe1ff730d840a49527e721bfb30899).
> >
> > It can be cloned here:
> > http://git.greensocs.com/fkonrad/mttcg.git branch async_work_v2
> >
> > The first patch introduces a mutex to protect the existing queued_work_*
> > CPUState members against multiple (concurent) access.
> >
> > The second patch introduces a tcg_executing_flag which will be 1 when we are
> > inside cpu_exec(). This is required as safe work need to be sure that's all vCPU
> > are outside cpu_exec().
> >
> > The last patch introduces async_safe_work. It allows to add some work which will
> > be done asynchronously but only when all vCPUs are outside cpu_exec(). The tcg
> > thread will wait that no vCPUs have any pending safe work before reentering
> > cpu-exec().
> >
> > Changes V1 -> V2:
> >    * Release the lock while running the callback for both async and safe work.
> What tree do these patches apply to?
>
> Paolo

Hi,
it applies on :

(6169b60285fe1ff730d840a49527e721bfb30899)

I need to rebase mttcg on it.. But I cleaned up/sent this part for Alvise.

Fred

> > KONRAD Frederic (3):
> >    cpus: protect queued_work_* with work_mutex.
> >    cpus: add a tcg_executing flag.
> >    cpus: introduce async_run_safe_work_on_cpu.
> >
> >   cpu-exec.c        |   7 +++
> >   cpus.c            | 164 +++++++++++++++++++++++++++++++++++++++++-------------
> >   include/qom/cpu.h |  28 ++++++++++
> >   qom/cpu.c         |   2 +
> >   4 files changed, 161 insertions(+), 40 deletions(-)