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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 16:19:42 +0300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
On 12/04/16 16:03, Pavel Dovgalyuk wrote:
>> From: address@hidden [mailto:address@hidden
>> On 12/04/16 15:50, KONRAD Frederic wrote:
>>>> Yes, but users may like to have an option to disable MTTCG for some
>>>> reason. I'm also concerned about icount mode: not sure how to account
>>>> virtual time when all vCPUs run in parallel.
>>> I'm thinking the same, we don't have a solution for icount yet.
>>> The reverse execution support is probably badly broken as well.
>> Reverse execution doesn't even seem to support more than a single core.
>> As of icount, it looks like to be incompatible with MTTCG.
> It doesn't, because there is no multicore support for tcg yet.
> I think, that we have to find some solution for icount (even if it will be
> slow).
Synchronize all vCPUs against their instruction counters? I wonder would
it be of much use in MTTCG mode if it turns out to be quite slow?
Anyhow, valid point, we should think about it.
Kind regards,
Sergey
- [Qemu-devel] [RFC v2 02/11] cpus: make all_vcpus_paused() return bool, (continued)
- [Qemu-devel] [RFC v2 02/11] cpus: make all_vcpus_paused() return bool, Alex Bennée, 2016/04/05
- [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 <=
- 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, 2016/04/12
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