[ACTIVITY] report week ending 6 Jul

2023-07-06 Thread Peter Maydell
Progress (short week, 3 days):
 * UM-2 [QEMU upstream maintainership]
  - softfreeze is next week, so spent some time putting together
a pull request, fixing the bugs which the CI tests found in
it, etc
 * QEMU-422 [QEMU Arm Neoverse V1 vCPU for TCG]
  - now that we implement all the necessary features (excluding
some trace/profiling type stuff that is out-of-scope for
QEMU, and also FEAT_NV that we might come back to later), sent
out the patchset to define a 'neoverse-v1' CPU type for QEMU

-- PMM
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[ACTIVITY] report week ending 6 Jul

2018-07-06 Thread Peter Smith
[TCWG-1368] Tracked down libfuzzer buildbot failures on aarch64 and raised PR
[TCWG-1424] Use profile information for size optimisation
- Decided to use clang's 2-stage PGO build as next experiment with
compile times on the full test suite as the performance benchmarks
- Spent rather too much time trying to inject an extra c-flag into the
right stage of the bootstrap builds. As a consolation I know a little
bit more about the bootstrap builds.
- Just measuring code size the profile guided feedback builds of clang
are roughly 33% larger than standard clang, with cold functions
optimised for size this drops to 25% larger. Still waiting for
performance figures for all runs. It is looking like in its current
formulation the size optimisation might offer most of the benefits of
PGO but with a lower code size impact. It misses the original goal of
keeping the performance of non-PGO optimisation but lower overall
size.
[Misc] Tracked down a LLD static build failure with a recent glibc.
Looks like it won't affect Arm and AArch64 as it is related to X86
relaxed got relocations to ifunc resolvers.

Planned absences
- Holiday Monday 9th July
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[ACTIVITY] report week ending 6 Jul

2018-07-06 Thread Peter Maydell
Progress:
 * VIRT-65 [QEMU upstream maintainership]
  + softfreeze-related maintenance work
  + investigating reported bug with CMSDK timer device model:
couldn't reproduce hangs, but sent patches which fix
various issues
  + code review:
- various patches by the Outreachy/GSoC interns for
  the v6M/microbit work
- a few OSX UI bugfix patches
  + scrub through some recently filed bugs to see what might be
worth investigating before the release
  + first pass through KVM Forum talk submissions

thanks
-- PMM
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