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[subinterpreters][meta] Move fields from _PyRuntimeState to PyInterpreterState. #81058

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[subinterpreters][meta] Move fields from _PyRuntimeState to PyInterpreterState.#81058
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ericsnowcurrently
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3.8 (EOL)end of lifetopic-subinterpreters

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@ericsnowcurrently
ericsnowcurrently
opened on May 10, 2019
BPO 36877
Nosy @vstinner, @phsilva, @ericsnowcurrently, @soltysh
Superseder
  • bpo-40512: [subinterpreters] Meta issue: per-interpreter GIL
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = 'https://github.com/ericsnowcurrently'
closed_at = <Date 2020-05-15.01:31:54.956>
created_at = <Date 2019-05-10.19:11:57.764>
labels = ['expert-subinterpreters', '3.8']
title = '[subinterpreters][meta] Move fields from _PyRuntimeState to PyInterpreterState.'
updated_at = <Date 2020-05-15.01:31:54.955>
user = 'https://github.com/ericsnowcurrently'

    bugs.python.org fields:

    activity = <Date 2020-05-15.01:31:54.955>
actor = 'vstinner'
assignee = 'eric.snow'
closed = True
closed_date = <Date 2020-05-15.01:31:54.956>
closer = 'vstinner'
components = ['Subinterpreters']
creation = <Date 2019-05-10.19:11:57.764>
creator = 'eric.snow'
dependencies = []
files = []
hgrepos = []
issue_num = 36877
keywords = []
message_count = 4.0
messages = ['342120', '342121', '342126', '368907']
nosy_count = 4.0
nosy_names = ['vstinner', 'phsilva', 'eric.snow', 'maciej.szulik']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '40512'
type = None
url = 'https://bugs.python.org/issue36877'
versions = ['Python 3.8']

    Activity

    1. ericsnowcurrently commented on May 10, 2019

      @ericsnowcurrently
      ericsnowcurrently
      on May 10, 2019
      MemberAuthor

      We have quite a bit of global state the runtime that effectively breaks the isolation between interpreters. Some of it exists as "global" C variables (see bpo-36876) and the rest as fields on _PyRuntimeState. The offending state should be moved to PyInterpreterState.

      See Include/internal/pycore_pystate.h for the _PyRuntimeState and PyInterpreterState structs.

    2. ericsnowcurrently
      added
      interpreter-core(Objects, Python, Grammar, and Parser dirs)
      3.8 (EOL)end of life
      on May 10, 2019
    3. ericsnowcurrently
      self-assigned this
      on May 10, 2019

    4. ericsnowcurrently commented on May 10, 2019

      @ericsnowcurrently
      ericsnowcurrently
      on May 10, 2019
      MemberAuthor

      FYI, I've already started some of this work:

      Other bits I'm planning on:

      • the rest of the global "ceval" state
      • the memory allocators
      • the GIL

      Note that, to make the GIL per-interpreter, we can't have any remaining runtime state shared by interpreters (unless it is protected by its own locks).

    5. ericsnowcurrently commented on May 10, 2019

      @ericsnowcurrently
      ericsnowcurrently
      on May 10, 2019
      MemberAuthor

      In conjunction with bpo-36876, there are a bunch of currently ignored globals (in Tools/c-globals/ignored-globals.txt) that should actually be moved to per-interpreter runtime state. This mostly applies to any globals that point to one or more objects, since objects must not be shared by interpreters.

    6. vstinner
      added
      topic-subinterpreters
      and removed
      interpreter-core(Objects, Python, Grammar, and Parser dirs)
      on May 15, 2020
    7. vstinner
      changed the title [-][meta] Move fields from _PyRuntimeState to PyInterpreterState.[/-] [+][subinterpreters][meta] Move fields from _PyRuntimeState to PyInterpreterState.[/+] on May 15, 2020

    8. vstinner commented on May 15, 2020

      @vstinner
      vstinner
      on May 15, 2020
      Member

      I mark this issue as a duplicate of bpo-40512.

    9. vstinner
      closed this as completedon May 15, 2020
    10. ezio-melotti
      transferred this issue fromon Apr 10, 2022
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