[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

From: Frederic Konrad
Subject: Re: [Qemu-devel] [RFC PATCH V2 0/3] Multithread TCG async_safe_work part.
Date: Wed, 15 Jul 2015 09:44:56 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

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

Changes V1 -> V2:
   * Release the lock while running the callback for both async and safe work.
What tree do these patches apply to?


it applies on :


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


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(-)

reply via email to

[Prev in Thread] Current Thread [Next in Thread]