Minutes_2021_12_14

Numba Meeting: 2021-12-14

Attendees: Siu Kwan Lam, Val, Ehsan Totoni, Graham Markall, Keaton Drebes, stuart, Benjamin Graham, Nick Riasanovsky, Luk, brandon willard

NOTE: All communication is subject to the Numba Code of Conduct.

This is the last meeting for 2021 Please refer to this calendar for the next meeting date.

Finishing up Numba 0.55.0rc1
- Still waiting on Anaconda build of Numpy packages for Python 3.10
- Hopefully tag this week (Week 50)
- Waiting on 7082, almost ready, waiting on Nick for final touches, thank you 🙏
Discussion on https://numba.discourse.group/t/how-does-mangling-args-work-for-types-with-parameters/1054
- Siu TODO: fill answer into the discourse discussion
- Siu TODO: open bug issue on Record._code used in mangling_args here
CUDA Float16 PR question
- Stuart asked about fp16 datamodel being registered into the default registry.
- Graham: no safety concern because of the lack of typing and lowering in the CPU target. This is not clean.
Ehsan asks about caching/freezing arrays
- Magic numbers depend on the hardware, RasPi vs. beefy 128 core box
Brandon asks about debuggging and contorl flow graphs

#7624 - Compare DeviceArray and CuPy arrays
#7630 - Function with two logic paths and two pranges gives erroneous result when compiled with parallel=True
- fixed in https://github.com/numba/numba/pull/7636
#7640 - Boolean operators behave differently when refactoring intermediate expression into variable
- would be fix by separating out builtin scalars vs numpy scalars
#7641 - Pickle errors when njiting compile & execed functions with cache=True
#7642 - debuginfo flag attempts to set noinline on functions with alwaysinline
- fixed in https://github.com/numba/numba/pull/7645
#7643 - numba.tests.test_refop_pruning.TestRefOpPruning.test_diamond_2 test failure
#7647 - TypingError: No implementation of function Function(<function runtime_broadcast_assert_shapes at 0x7f8071985280>) found for signature: runtime_broadcast_assert_shapes(Literalint, array(float64, 1d, C))

#7623 - NumbaIRAssumptionWarning: variable 'a.1.1' is not in scope.
#7633 - Kernel won't compile with "Access Violation" in cuda >= 11.2 when debug = True
#7646 - Caching doesn't work in Jupyter notebook on macOS

Request for 0.55
- broadcast_to https://github.com/numba/numba/pull/7119
  - driven by need for vectorize support in aesara
  - Now merged