From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59270) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZEcJ2-0002gl-PP for qemu-devel@nongnu.org; Mon, 13 Jul 2015 07:53:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZEcIz-0001O3-Fz for qemu-devel@nongnu.org; Mon, 13 Jul 2015 07:53:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35366) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZEcIz-0001Nz-9y for qemu-devel@nongnu.org; Mon, 13 Jul 2015 07:53:53 -0400 References: <1436544486-31169-1-git-send-email-fred.konrad@greensocs.com> From: Paolo Bonzini Message-ID: <55A3A6CB.2040104@redhat.com> Date: Mon, 13 Jul 2015 13:53:47 +0200 MIME-Version: 1.0 In-Reply-To: <1436544486-31169-1-git-send-email-fred.konrad@greensocs.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [RFC PATCH V2 0/3] Multithread TCG async_safe_work part. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: fred.konrad@greensocs.com, qemu-devel@nongnu.org, mttcg@greensocs.com Cc: mark.burton@greensocs.com, alex.bennee@linaro.org, a.rigo@virtualopensystems.com, guillaume.delbergue@greensocs.com On 10/07/2015 18:08, fred.konrad@greensocs.com wrote: > From: KONRAD Frederic > > 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 > 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(-) >