Minutes_2022_06_14

Numba Meeting: 2022-06-14

Attendees: Siu Kwan Lam, Val, Andre Masella, Graham Markall, LI Da, Nicholas Riasanovsky, stuart, Todd A. Anderson, Shannon Quinn, Kaustubh Chaudhari, brandon willard, Luk, Guilherme Leobas

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

Please refer to this calendar for the next meeting date.

0. Discussion

• 0.56 status
  • Half way through burndown!
  • Anything to go in, must be ready by next week Tuesday!
  • Planning for a release next week Thursday!
  • Milestone is at: https://github.com/numba/numba/milestone/61
• numba-extras test, merge and expiration policy
  • TODO add automation for testing (copy from numba-scipy) https://github.com/numba/numba-extras/issues/5
• (feel free to insert topic for the upcoming meeting)
• AOT Interest (Nick)
• Support non-constant exception values - PR 8134 (Guilherme)
• NRT questions
  • Does NRT implies Python API dependency? (Guilherme)
  • External allocator https://github.com/numba/numba/blob/main/numba/core/runtime/nrt_external.h
• Early draft agenda of meetings (Shannon - am happy to help with this)
  • TODO: pin draft agenda to Discourse
• Stuart Reports:
  • NRT alloc stats to be removed to avoid extra atomic ops. (related to JimP and ROOT devs discussion last week)
  • CVE response handling
    • https://github.com/numpy/numpy/issues/21713
  • More NumPy stuff
    • https://mail.python.org/archives/list/numpy-discussion@python.org/thread/QL6BTNYZC3UXBUAWMCMO7KZJTDWBBPCO/
    • provide apis more suitable for type infering compilers
    • request type stable apis
    • #8008
    • NumPy 1.22 ufunc using low-prec SVML by default on some arch - may manifest in differences of a few ULPs on "newer" intel chips (skylake)

• Exposing Optimization Remarks in llvmlite in upcoming release

1. New Issues

• #8138 - Fix fp16 native cast for cpu target
• #8140 - replace_vars to auto fixup scope
• #8141 - Numerical differences in latest numba with NumPy 1.21 vs 1.22
• #8146 - Truediv Parfor fails when input array and return value has control flow
• #8149 - LLVM dump appears to be optimized when it shouldn't be
• #8155 - CUDA: Provide more flexibility in the FP error model
• #8156 - Make NRT stats counters optional, off by default
• #8157 - -pthread link flag missing in setup.py for linux-ppc64le

llvmlite:

• #852 - Not able to install Librosa on my remote Linux system
• #853 - External linking: warning "relocation in read-only section .text"

Closed Issues

• #8148 - '$phiXX.X.XX' is not in scope when try/catch in literal_unroll
• #8152 - NumPy 1.19.2 build 1 breaks public CI

2. New PRs

• #8139 - Stencil neighborhood option doesn't support numpy.integer
• #8143 - Add fastmath support to cc.export
• #8144 - Fix NumPy capitalisation in docs.
• #8145 - Allow ufunc builder to use previously JITed function
• #8147 - Adds size variable for a single array that cannot be inferred
• #8153 - Testing NumPy 1.23 RC 3 on public CI.
• #8154 - Testhound/native cast 8138
• #8158 - adding -pthread for linux-ppc64le in setup.py

Closed PRs

• #8142 - CUDA: Fix some missed changes from dropping 9.2
• #8150 - Constrain libgcc-ng version in incremental builds.
• #8151 - pin NumPy to build 0 of 1.19.2 on public CI