* [Qemu-devel] MTTCG sync-up call summary 28/09/2015
@ 2015-09-28 13:51 Alex Bennée
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From: Alex Bennée @ 2015-09-28 13:51 UTC (permalink / raw)
To: MTTCG Devel, QEMU Devel
Cc: Mark Burton, Alexander Spyridakis, Claudio Fontana, Alvise Rigo,
Emilio G. Cota, Paolo Bonzini, Frederic Konrad
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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