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[DRAFT] Refcount stats across scopes#1

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ambuc wants to merge 26 commits intomasterambuc/envoy:masterfrom refcount-stats-across-scopesambuc/envoy:refcount-stats-across-scopesCopy head branch name to clipboard

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Commits on Apr 11, 2018

• Initial hot/cold allocation proof of concept

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Commits on Apr 12, 2018

• Drafting out new BlockStatDataAllocator colocated for now

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Commits on Apr 16, 2018

• Working draft of BlockRawStatDataAllocator passing all AllocConsistencyTests

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Commits on Apr 17, 2018

• HotRestartImpl now relies upon BlockRawStatDataAllocator

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• Formatting updates

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• Assorted nits

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• Actually use BlockRawStatDataAllocator in BlockRawStatDataAllocator test

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• Make BlockRawStatDataAllocator member variable stats_set_ private

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• Formatting updates

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• Rework HotRestartImpl's member variable allocator_ to be a unique pointer, so that it can be initialized after the locks are held

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Commits on Apr 18, 2018

• Remove not-ready tests

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• Rename SharedMemoryHashSet to MemoryHashSet

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• Move allocator unit tests from hot_restart_impl_test to stats_impl_test

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• Add uniqueNaming test

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• Add stat_lock_ mutex to BlockRawStatDataAllocator

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• Add stat_lock for mocking purposes inside HotRestart abstract class

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• Add some documentation around BlockRawStatDataAllocator, assorted formatting fixes

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Commits on Apr 19, 2018

• Undo statLock stuff, replace calloc with more c-like allocation semantics

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• HotRestartImpl and HotRestartNopImpl now both create allocators, supply them with memory, have unit tests, and are not child classes of RawStatDataAllocator

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• Assorted formatting fixes

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Commits on Apr 20, 2018

• Rename SharedMemoryHashSet to BlockMemoryHashSet

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• Actually pass in stat_lock by reference to BlockRawStatDataAllocator instead of taking pointer to it

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• Formatting updates

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• Minor nits

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• Swap out TestAllocator for real instance of BlockRawStatDataAllocator for proper scope testing

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• Formatting updates

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