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  1. Documentation
  2. DOCS-14430

Investigate changes in SERVER-56728: Cannot run 4.9+ on Apple Silicon

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Details

    • Task
    • Status: Closed
    • Major - P3
    • Resolution: Works as Designed
    • None
    • 4.9.0-rc1, 5.0.0-rc0
    • manual, Server
    • None

    Description

      Description

      Downstream Change Summary

      We should adjust our documentation around the sandybridge requirement to indicate that it does not apply to macOS (or Windows, for that matter).

      Description of Linked Ticket

      Mongo 4.9+ cannot start on M1 laptops:

      % /tmp/mms-automation/test/versions/mongodb-macos-x86_64-4.9.0-rc0/bin/mongod
      zsh: illegal hardware instruction  /tmp/mms-automation/test/versions/mongodb-macos-x86_64-4.9.0-rc0/bin/mongod
      

      acm tracked down that this is because the ISA targeting for the server build was upgraded in 4.9 to sandybridge, which uses AVX instructions that are not handled by Rosetta:
      https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment

      Rosetta translates all x86_64 instructions, but it doesn't support the execution of some newer instruction sets and processor features, such as AVX, AVX2, and AVX512 vector instructions.

      He recommended special case downgrading the macOS target ISA to something that doesn’t generate AVX until we have a native Apple Silicon build.

      Scope of changes

      Impact to Other Docs

      MVP (Work and Date)

      Resources (Scope or Design Docs, Invision, etc.)

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              andrew.feierabend@mongodb.com Andrew Feierabend (Inactive)
              backlog-server-pm Backlog - Core Eng Program Management Team
              Andrew Feierabend Andrew Feierabend (Inactive)
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              Dates

                Created:
                Updated:
                Resolved:
                1 year, 2 weeks, 6 days ago