Minutes_2021_06_22

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Valentin Haenel edited this page Jun 22, 2021 · 1 revision

Numba Meeting: 2021-06-22

Attendees: Graham Markall, Guilherme, Hadia, Stuart, Valentin Haenel, Siu Kwan Lam, Brandon Willard, Jim Pivarski

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

0. Feature Discussion

0.54.0 RC 1 by the end of June
- Must have:
  - remaining target-overload PRs
  - remove ROC
  - dwarf improvement
  - LLVM 11
  - some CUDA PRs are very close
  - possibly others
faster compile PR vs debug info quality
- #6720 alters stack slot assignment in LLVM; reduce alloca
- Debug info relies on local in stack slot
- Elided stack slot leads to missing debug info for some locals
- Solutions:
  1. skip the stack slot eliding when debug=True.
  2. changes to a different LLVM debug metadata.
- Summary:
  - try 1 as workaround for the upcoming release.

1. New Issues

#7131 - Array.astype not supported with string literals
#7130 - Performance gains halt after 8 (out of 16) cores
** #7124 - Float Literal Support
- Jim
  - knows of useful cases in np.quantile and np.percentile.
  - interesting float values also include things like +inf, -inf, nan, 0, etc...
- Stuart's concerns:
  - overspecialization
  - loop unswitch will push the if checks outside of loops.
  - large impact (compile time) of many code
#7123 - Add chrome-tracing support in event API
#7120 - segfault regression case (happens in 0.52.0, 0.53.0 & 0.53.1, works OK in 0.51.2)
- immutability needs to propagte into elements of a container
#7117 - NUMBA_DISABLE_JIT causes an infinite loop in Structref instance creation.

Closed Issues

#7133 - Numbers don't add up?
#7128 - The example for jitclass does not appear to work
#7127 - Name error - numba doesn't find a function
#7126 - Silent crash for parallel typed list appending

2. New PRs

#7134 - Move minimum LLVM version to 11.
#7132 - gh #7131 Support for astype with literal strings
#7129 - Add support for axis keyword argument to np.argmin()
#7125 - Declare minimum sphinx version required for docs as 4.
#7121 - Continue work on numpy subclasses
#7119 - Add support for np.broadcast_to
#7116 - Fix various issues with dwarf emission:
#7115 - use np.asarray to convert arg to array

Closed PRs

#7122 - Rtd/sphinx compat
#7118 - Remove print to stdout

3. Next Release: Version 0.54.0/0.37.0, RC=June 2021

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