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Re: [Qemu-devel] Any topics for today's MTTCG sync-up call?

From: Claudio Fontana
Subject: Re: [Qemu-devel] Any topics for today's MTTCG sync-up call?
Date: Mon, 23 May 2016 14:57:12 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Thunderbird/38.5.0

On 23.05.2016 14:47, Alex Bennée wrote:
> alvise rigo <address@hidden> writes:
>> Hi Alex,
>> I finally solved the issue I had, the branch is working well as far as I
>> can say.
>> The work I will share, in addition to making the LL/SC work mttcg-aware,
>> extends the various TLB flushes calls with the query-based mechanism: the
>> requesting CPU queries the flushes to the target CPUs and wait them for
>> completion.
>> Sorry for the delay, I have been quite busy. I just need to polish some
>> commits, than (this week) I will share the branch.
> Thanks for the update. It sounds like we don't need to add to that on
> the call.
> Anyone else have something they want to discuss?

Hi, at some point in the past there was a set of performance benchmarks which 
were showing the improvements using mttcg,
is there some update on that?



>> Best regards,
>> alvise
>> On Mon, May 23, 2016 at 12:57 PM, Alex Bennée <address@hidden>
>> wrote:
>>> Hi,
>>> It's been a while since the last sync-up call. Have we got any topics to
>>> discuss today?
>>> Sergey and I (with a little Paolo) have spent some of last week delving
>>> into the locking hierarchy w.r.t to tb_lock vs mmap_lock to see if there
>>> is any simplification to be had. I'm not sure if this is a topic
>>> conducive to a phone call instead of the mailing list but if others want
>>> to discuss it we can add it as an agenda item.
>>> We also have a new member of the team. Pranith has joined as a GSoC
>>> student. He'll be looking at memory ordering with his first pass at the
>>> problem looking to solve the store-after-load issues which do show up on
>>> ARM-on-x86 (see my testcase).
>>> Alvise, is there any help you need with the LL/SC stuff? The MTTCG aware
>>> version has been taking some time so would it be worth sharing the
>>> issues you have hit with the group?
>>> Emilio, is there anything you want to add? I've been following the QHT
>>> stuff which is a really positive addition which my v3 base patches is
>>> based upon (making the hot-path non lock contended). Do you have
>>> anything in the works above that?
>>> Cheers,
>>> --
>>> Alex Bennée
> --
> Alex Bennée

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