Minutes_2020_07_07

Numba Meeting: 2020-07-07

Attendees: Aaron, Guilherme, Hameer, Stuart, Val, Siu, Todd

0. Feature Discussion

• Open meeting next week. Agenda?!

  • Discourse feedback
  • Roadmap needs Community growing?
  • Daily task of maintainers
    • short presentation
  • Expectation on timeframe
  • look at zenhub
    • dependency tree
    • Can possibly visualize with https://github.com/ZenHubIO/API#dependencies
  • How to get community involved in
    • 1st/2nd pass review
    • labelling: difficulty, category by component
    • Link to label for "easy" PR/issues in CONTRIBUTING?
  • Any ideas from the community?
  • meeting themes
    • TODO: announce meeting and ask for theme; then vote on theme

• Burndown starts tomorrow.

  • Need to do burndown meeting

• Discussion on https://github.com/numba/numba/pull/5921

1. New Issues

• #5955 - LoweringError: LLVM IR Parsing Error during scanpy sc.pp.calculate_qc_metrics
  • need a cast somewhere
• #5954 - Move doc links over to RTD
  • just a reminder
• ** #5953 - Extreme compilation times with long tuples
  • IR is massive
• ** #5951 - Decide whether or not to support the target kwarg in the numba.jit decorator
  • Someone needs to put in the work, to see if this is even a valid code path.
  • Does it really need to be public API? Can we rename to _target instead?
  • 1-cycle deprecation for target. _target as internal API
  • Fix up valid target code paths, remove invalid ones, e.g. 'gpu'
• #5950 - ndarray.flags.writeable = False for structured array compiles/silently fails to assign with njit
  • Normally the compiler should catch this, but we don't do this properly yet for structured arrays
  • Accidentally doing the right thing?
  • This should warn during compilation
• #5948 - strange behavior of @guvectorize
  • Dependent on how Numpy allocates the res array
  • Should have gone to discourse
• #5942 - doing " += 1" in arrays does not add one in prange loop
  • Maybe doesn't recorgnize the assignment
  • A slice assigned to a slice: parfor within a parfor
• #5934 - Cannot Fill 0d Structured/Record Arrays
  • Structured arrays will need some updating
  • Perhaps a task for the community?
  • Now that more fascilities are available, an update might be feasible, but needs a ticket

Closed Issues

• #5961 - invalid number of args for optional arguments of jitclass methods.
• #5957 - I can't install numba on rpi 4b
• #5947 - numba -s fails with: AttributeError: 'str' object has no attribute 'items'
• #5943 - Compilation is falling back to object mode WITH looplifting enabled
• #5939 - Unary variation of np.round doesn't work as expected.

2. New PRs

• #5962 - Fix SVML tests with LLVM 10 and AVX512
• **** #5960 - Setting mypy on CI
  • good experiment to see how well it works in numba codebase
  • mypy Protocol
• #5959 - Making typed.Dict a typing MutableMapping
• #5958 - Making typed.List a typing Generic
• #5952 - Fix "Internal error ... local variable 'errstr' referenced before assignment during BoundFunction(...)"
• #5946 - Implement literal dictionaries and lists.
• #5945 - Fixes the jit decorator with target='cuda'
• #5944 - re-enable OpenMP in wheels
  • needs manual testing
• #5941 - Fix/cuda atomic nanminmax
• #5938 - Initial support for dynamic gufuncs
• #5936 - Improve array analysis for user-defined data types.

Closed PRs

• #5956 - Update numba_sysinfo.py
• #5949 - Fix for: numba -s fails with: AttributeError: 'str' object has no attribute 'items'
  • Solved: #5947
• #5940 - Add discourse badge
• #5937 - [WIP] Make signature optional on guvectorize
• #5935 - Fix default arguments with multiprocessing

3. Next Release: Version 0.51.0, RC=22 July, Final 29 July?

• Requests for 0.51

• high risk stuff for 0.51.

• 0.51 potential tasks (To be updated)

4. Upcoming tasks

• Opening up the numba meeting