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[Qemu-devel] MTTCG sync-up call summary 28/09/2015
From: |
Alex Bennée |
Subject: |
[Qemu-devel] MTTCG sync-up call summary 28/09/2015 |
Date: |
Mon, 28 Sep 2015 14:51:17 +0100 |
User-agent: |
mu4e 0.9.13; emacs 24.5.50.4 |
Here follows a slightly abbreviated form of my notes for the sync-up
call. Please reply if anything is missing on unclear ;-)
- Alvise has posted v5 addressing Paolo's comments
- bitmap addresses TLB size issues
- consensus we can go with Alvise's and build on them with ideas from Emilo's
series
- Alvise will have a look through during re-basing to see if any potential
conflicts
- Hope to take best of both worlds approach with slow and fast path later
- Fred patch status
- Waiting for latest re-base from Paolo
- Signal Free TCG and linux-user fixes now merged upstream so re-base can be
done there
- Paolo
- Tree breakage AJB reported seems to be in merge-base but exacerbated by
Paolo's MTTCG branch
- upstream master seems much more stable, we shall see when Fred re-bases
- Alex will hammer it when ready to check bug has disappeared
- Outstanding work from Paolo's review:
- missing breakpoint support
- invalidating flag
- locking on tb_get_next
- Reverse playback may conflict a little when it arrives in tree
- but still a week or so of getting into Paolo's tree
- Memory Barriers
- Paper referenced by Emilo's patch set is good read
[[https://www.cs.princeton.edu/research/techreps/TR-981-15][here]]
- Alex will take Emilo's work for ARM on ARM testing
- Would be nice to demo ARM on ARM/AArch64 in November
- Alex plans to tests with all ARM barrier types by end of week
- Any work good for new people to ease in?
- Look at breakpoints, is GDB stub working?
- Benchmarking: perhaps get some independent numbers on both atomic
implementations?
--
Alex Bennée
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