• Michael Achenbach's avatar
    Revert "[heap] Reduce size of possibly empty buckets" · 37e62175
    Michael Achenbach authored
    This reverts commit 80caf2cf.
    
    Reason for revert: Breaks gpu tests:
    https://ci.chromium.org/p/v8/builders/ci/Win%20V8%20FYI%20Release%20(NVIDIA)/5570
    # Debug check failed: !possibly_empty_buckets->Contains(bucket_index).
    
    Original change's description:
    > [heap] Reduce size of possibly empty buckets
    > 
    > Before this CL a byte was used per bucket to store whether the bucket
    > is possibly empty or not. This CL changes this such that each bucket
    > only needs a single bit.
    > 
    > PossiblyEmptyBuckets is now a word in the page header. If more bits
    > are needed than fit into a single word, an external bitmap is
    > allocated using AlignedAlloc. Storing this on the page header, allows
    > to remove initial_buckets from the SlotSet. The SlotSet allocation is
    > then again a power-of-2 in release mode.
    > 
    > Change-Id: If61fd5cfa153f98757beeb444a530f6e2803fdb6
    > Bug: chromium:1023139
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1906376
    > Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
    > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#64991}
    
    TBR=ulan@chromium.org,dinfuehr@chromium.org
    
    # Not skipping CQ checks because original CL landed > 1 day ago.
    
    Bug: chromium:1023139
    Change-Id: Ia90b07b9562af934dacba012da31e4f172f2922d
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1918258Reviewed-by: 's avatarMichael Achenbach <machenbach@chromium.org>
    Commit-Queue: Michael Achenbach <machenbach@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#65001}
    37e62175
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