tree 1a80b75dabd82f7aab9a8eb9e50514da20853d15
parent 696eae3fc248ba95f05045399c3c84e543c1cc33
author Yu Yin <xwafish@gmail.com> 1561015370 +0800
committer Commit Bot <commit-bot@chromium.org> 1561026952 +0000

[mips][lite] Allocate feedback vectors lazily

Port: 7629afd https://crrev.com/c/1520719

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: Icddceec22df3dad7861a30f0190397db130db10d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1669116
Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Yu Yin <xwafish@gmail.com>
Cr-Commit-Position: refs/heads/master@{#62301}