foedus::memory::PagePoolOffsetChunk Class Reference

To reduce the overhead of grabbing/releasing pages from pool, we pack this many pointers for each grab/release. More...

Detailed Description

To reduce the overhead of grabbing/releasing pages from pool, we pack this many pointers for each grab/release.

The pointers themselves might not be contiguous. This is just a package of pointers.

Definition at line 47 of file page_pool.hpp.

#include <page_pool.hpp>

Public Types
enum	Constants { kMaxSize = (1 << 12) - 1 }

Public Member Functions
	PagePoolOffsetChunk ()
uint32_t	capacity () const
uint32_t	size () const
bool	empty () const
bool	full () const
void	clear ()
PagePoolOffset	pop_back ()
void	push_back (PagePoolOffset pointer)
void	push_back (const PagePoolOffset *begin, const PagePoolOffset *end)
void	move_to (PagePoolOffset *destination, uint32_t count)

Member Enumeration Documentation

enum foedus::memory::PagePoolOffsetChunk::Constants

Enumerator
kMaxSize	Max number of pointers to pack. -1 for size_ (make the size of this class power of two).

Definition at line 49 of file page_pool.hpp.

                 {
    kMaxSize = (1 << 12) - 1,
  };

Constructor & Destructor Documentation

foedus::memory::PagePoolOffsetChunk::PagePoolOffsetChunk ( )

inline

Definition at line 56 of file page_pool.hpp.

: size_(0) {}

Member Function Documentation

uint32_t foedus::memory::PagePoolOffsetChunk::capacity ( ) const

inline

Definition at line 58 of file page_pool.hpp.

References kMaxSize.

Referenced by foedus::memory::PagePoolPimpl::grab(), foedus::memory::RoundRobinPageGrabBatch::grab(), and foedus::memory::DivvyupPageGrabBatch::grab().

{ return kMaxSize; }

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void foedus::memory::PagePoolOffsetChunk::clear ( )

inline

Definition at line 62 of file page_pool.hpp.

Referenced by foedus::snapshot::SnapshotManagerPimpl::drop_volatile_pages(), and foedus::snapshot::SnapshotManagerPimpl::drop_volatile_pages_parallel().

{ size_ = 0; }

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bool foedus::memory::PagePoolOffsetChunk::empty ( ) const

inline

Definition at line 60 of file page_pool.hpp.

Referenced by foedus::storage::Composer::DropVolatilesArguments::drop(), foedus::snapshot::SnapshotManagerPimpl::drop_volatile_pages_parallel(), foedus::memory::RoundRobinPageGrabBatch::grab(), foedus::memory::NumaCoreMemory::grab_free_snapshot_page(), foedus::memory::NumaCoreMemory::grab_free_volatile_page(), pop_back(), foedus::memory::PagePoolOffsetAndEpochChunk::push_back(), and foedus::memory::RoundRobinPageGrabBatch::release_all().

{ return size_ == 0; }

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bool foedus::memory::PagePoolOffsetChunk::full ( ) const

inline

Definition at line 61 of file page_pool.hpp.

References kMaxSize.

Referenced by foedus::storage::sequential::SequentialStoragePimpl::drop(), foedus::storage::Composer::DropVolatilesArguments::drop(), push_back(), foedus::memory::PagePoolOffsetAndEpochChunk::push_back(), foedus::memory::NumaCoreMemory::release_free_snapshot_page(), and foedus::memory::NumaCoreMemory::release_free_volatile_page().

{ return size_ == kMaxSize; }

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void foedus::memory::PagePoolOffsetChunk::move_to	(	PagePoolOffset *	destination,
		uint32_t	count
	)

Definition at line 40 of file page_pool.cpp.

References ASSERT_ND.

                                                                             {
  ASSERT_ND(size_ >= count);
  std::memcpy(destination, chunk_ + (size_ - count), count * sizeof(PagePoolOffset));
  // we move from the tail of this chunk. so, just decrementing the count is enough.
  // no need to move the remainings back to the beginning
  size_ -= count;
}

PagePoolOffset foedus::memory::PagePoolOffsetChunk::pop_back ( )

inline

Definition at line 64 of file page_pool.hpp.

References ASSERT_ND, and empty().

Referenced by foedus::memory::RoundRobinPageGrabBatch::grab(), foedus::memory::NumaCoreMemory::grab_free_snapshot_page(), and foedus::memory::NumaCoreMemory::grab_free_volatile_page().

                                     {
    ASSERT_ND(!empty());
    return chunk_[--size_];
  }

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void foedus::memory::PagePoolOffsetChunk::push_back ( PagePoolOffset  pointer )

inline

Definition at line 68 of file page_pool.hpp.

References ASSERT_ND, and full().

Referenced by foedus::storage::sequential::SequentialStoragePimpl::drop(), foedus::storage::Composer::DropVolatilesArguments::drop(), foedus::memory::PagePoolPimpl::grab(), foedus::memory::PageReleaseBatch::release(), foedus::memory::NumaCoreMemory::release_free_snapshot_page(), and foedus::memory::NumaCoreMemory::release_free_volatile_page().

                                                            {
    ASSERT_ND(!full());
    chunk_[size_++] = pointer;
  }

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void foedus::memory::PagePoolOffsetChunk::push_back	(	const PagePoolOffset *	begin,
		const PagePoolOffset *	end
	)

Definition at line 34 of file page_pool.cpp.

References ASSERT_ND, and kMaxSize.

                                                                                          {
  uint32_t count = end - begin;
  ASSERT_ND(size_ + count <= kMaxSize);
  std::memcpy(chunk_ + size_, begin, count * sizeof(PagePoolOffset));
  size_ += count;
}

uint32_t foedus::memory::PagePoolOffsetChunk::size ( ) const

inline

Definition at line 59 of file page_pool.hpp.

Referenced by foedus::storage::sequential::SequentialStoragePimpl::drop(), foedus::storage::Composer::DropVolatilesArguments::drop(), foedus::snapshot::SnapshotManagerPimpl::drop_volatile_pages_parallel(), foedus::memory::PagePoolPimpl::grab(), foedus::memory::RoundRobinPageGrabBatch::release_all(), and foedus::memory::NumaCoreMemory::uninitialize_once().

{ return size_; }

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The documentation for this class was generated from the following files:

• /home/shino/foedus_code/foedus-core/include/foedus/memory/page_pool.hpp
• /home/shino/foedus_code/foedus-core/src/foedus/memory/page_pool.cpp