• Milad Farazmand's avatar
    PPC/S390: [lite] Allocate feedback vectors lazily · b0cfb778
    Milad Farazmand authored
    Port: 7629afdb
    
    Original Commit Message:
    
        Allocate feedback vectors lazily when the function's interrupt budget has
        reached a specified threshold. This cl introduces a new field in the
        ClosureFeedbackCellArray to track the interrupt budget for allocating
        feedback vectors. Using the interrupt budget on the bytecode array could
        cause problems when there are closures across native contexts and we may
        delay allocating feedback vectors in one of them causing unexpected
        performance cliffs. In the long term we may want to remove interrupt budget
        from bytecode array and use context specific budget for tiering up decisions
        as well.
    
    Change-Id: I261a7f7cedbdaa3be2d0cf22bfa701598f749fd9
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1539794Reviewed-by: 's avatarJunliang Yan <jyan@ca.ibm.com>
    Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
    Cr-Commit-Position: refs/heads/master@{#60479}
    b0cfb778
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