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Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG
From: |
Sergey Fedorov |
Subject: |
Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG |
Date: |
Tue, 12 Apr 2016 15:48:21 +0300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
On 12/04/16 14:48, Alex Bennée wrote:
> Sergey Fedorov <address@hidden> writes:
>
>> On 05/04/16 18:32, Alex Bennée wrote:
>>> diff --git a/qemu-options.hx b/qemu-options.hx
>>> index a770086..4eca704 100644
>>> --- a/qemu-options.hx
>>> +++ b/qemu-options.hx
>>> @@ -3224,6 +3224,20 @@ Attach to existing xen domain.
>>> xend will use this when starting QEMU (XEN only).
>>> ETEXI
>>>
>>> +DEF("tcg", HAS_ARG, QEMU_OPTION_tcg, \
>>> + "-tcg [mttcg=on|off] control TCG options\n", QEMU_ARCH_ALL)
>>> +STEXI
>>> address@hidden -tcg
>>> address@hidden -tcg
>>> address@hidden @option
>>> address@hidden mttcg=[on|off]
>>> +Control multi-threaded TCG. By default QEMU will enable multi-threaded
>>> +emulation for front/back-end combinations that are known to work. The
>>> +user may enable it against the defaults however odd guest behaviour
>>> +may occur.
>>> address@hidden table
>>> +ETEXI
>> Maybe we'd better use existing qemu accelerator framework and introduce
>> "-machine accel=mttcg" option?
> My worry would be breaking existing code which assumes kvm | tcg. We
> will want to enable mttcg by default for combos that work without having
> to tweak tooling that already uses the -machine options.
You are right, we'd better make MTTCG as an option for TCG, not as a
separate accelerator.
Kind regards,
Sergey
- [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, (continued)
- [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Alex Bennée, 2016/04/05
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Sergey Fedorov, 2016/04/11
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Alex Bennée, 2016/04/12
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Peter Maydell, 2016/04/12
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Sergey Fedorov, 2016/04/12
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, KONRAD Frederic, 2016/04/12
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Sergey Fedorov, 2016/04/12
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Pavel Dovgalyuk, 2016/04/12
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Sergey Fedorov, 2016/04/12
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Alex Bennée, 2016/04/12
- Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG,
Sergey Fedorov <=
Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG, Sergey Fedorov, 2016/04/12
[Qemu-devel] [RFC v2 01/11] tcg: move tb_invalidated_flag to CPUState, Alex Bennée, 2016/04/05
[Qemu-devel] [RFC v2 03/11] docs: new design document multi-thread-tcg.txt (DRAFTING), Alex Bennée, 2016/04/05
[Qemu-devel] [RFC v2 11/11] tcg: enable thread-per-vCPU, Alex Bennée, 2016/04/05
[Qemu-devel] [RFC v2 07/11] tcg: cpus rm tcg_exec_all(), Alex Bennée, 2016/04/05
[Qemu-devel] [RFC v2 10/11] tcg: drop global lock during TCG code execution, Alex Bennée, 2016/04/05