content: add Java false-sharing Learning Path - #3711
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Add an Arm-focused guide to detecting and mitigating Java false cache-line sharing. Major changes: - explain cache-line contention and inspect object layouts with JOL - profile shared lines on Arm Neoverse using SPE and Perf C2C - apply @contended padding and compare repeated runtimes - include the Java sample, cache-line diagram, and style-aligned guidance
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Add an Arm-focused guide to detecting and mitigating Java false cache-line sharing.
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Before submitting a pull request for a new Learning Path, please review Create a Learning Path
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