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Enable FLAG_feedback_allocation_on_bytecode_size

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This flag enables feedback allocation heuristics to be based on the
function size. The threshold for feedback allocation is set to
4 * bytecode size to roughly mimic the allocation after 4 invocations.

Change-Id: Ia840cd526e3718d4267e01c688c6c6467e352d72
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2685175
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72631}
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Mythri A 2021-02-10 15:08:37 +00:00 committed by Commit Bot
parent 76e8b811a1
commit 2a446a9058
1 changed files with 1 additions and 1 deletions
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2
src/flags/flag-definitions.h
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@ -505,7 +505,7 @@ DEFINE_INT(budget_for_feedback_vector_allocation, 1 * KB,
"decide to allocate feedback vectors")
DEFINE_INT(scale_factor_for_feedback_allocation, 4,
"scale bytecode size for feedback vector allocation.")
DEFINE_BOOL(feedback_allocation_on_bytecode_size, false,
DEFINE_BOOL(feedback_allocation_on_bytecode_size, true,
"Instead of a fixed budget for lazy feedback vector allocation, "
"scale it based in the bytecode size.")
DEFINE_BOOL(lazy_feedback_allocation, true, "Allocate feedback vectors lazily")