fb28cfe603
So far, discarded size was maintained by the sweeper but not wired up anywere. Changes in this patch: - Wire up resident size in heap statistics collection. - Fix bugs in reporting committed and resident size. - Sweeper test: Enforce some internal details. The details should not not be checked broadly but be kept as a detail to the sweeper itself. - Stats collection: Test that committed and resident set size are reported and differ after discarding GCs. Bug: chromium:1056170 Change-Id: Icf8871c7ea3b28253233485c736b2ca4816fd6f2 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3020971 Reviewed-by: Anton Bikineev <bikineev@chromium.org> Reviewed-by: Omer Katz <omerkatz@chromium.org> Commit-Queue: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/master@{#75684}
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
// Copyright 2021 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#ifndef INCLUDE_CPPGC_HEAP_STATISTICS_H_
|
|
#define INCLUDE_CPPGC_HEAP_STATISTICS_H_
|
|
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
namespace cppgc {
|
|
|
|
/**
|
|
* `HeapStatistics` contains memory consumption and utilization statistics for a
|
|
* cppgc heap.
|
|
*/
|
|
struct HeapStatistics final {
|
|
/**
|
|
* Specifies the detail level of the heap statistics. Brief statistics contain
|
|
* only the top-level allocated and used memory statistics for the entire
|
|
* heap. Detailed statistics also contain a break down per space and page, as
|
|
* well as freelist statistics and object type histograms. Note that used
|
|
* memory reported by brief statistics and detailed statistics might differ
|
|
* slightly.
|
|
*/
|
|
enum DetailLevel : uint8_t {
|
|
kBrief,
|
|
kDetailed,
|
|
};
|
|
|
|
/**
|
|
* Object statistics for a single type.
|
|
*/
|
|
struct ObjectStatsEntry {
|
|
/**
|
|
* Number of allocated bytes.
|
|
*/
|
|
size_t allocated_bytes;
|
|
/**
|
|
* Number of allocated objects.
|
|
*/
|
|
size_t object_count;
|
|
};
|
|
|
|
/**
|
|
* Page granularity statistics. For each page the statistics record the
|
|
* allocated memory size and overall used memory size for the page.
|
|
*/
|
|
struct PageStatistics {
|
|
/** Overall committed amount of memory for the page. */
|
|
size_t committed_size_bytes = 0;
|
|
/** Resident amount of memory held by the page. */
|
|
size_t resident_size_bytes = 0;
|
|
/** Amount of memory actually used on the page. */
|
|
size_t used_size_bytes = 0;
|
|
/** Statistics for object allocated on the page. Filled only when
|
|
* NameProvider::HideInternalNames() is false. */
|
|
std::vector<ObjectStatsEntry> object_statistics;
|
|
};
|
|
|
|
/**
|
|
* Statistics of the freelist (used only in non-large object spaces). For
|
|
* each bucket in the freelist the statistics record the bucket size, the
|
|
* number of freelist entries in the bucket, and the overall allocated memory
|
|
* consumed by these freelist entries.
|
|
*/
|
|
struct FreeListStatistics {
|
|
/** bucket sizes in the freelist. */
|
|
std::vector<size_t> bucket_size;
|
|
/** number of freelist entries per bucket. */
|
|
std::vector<size_t> free_count;
|
|
/** memory size consumed by freelist entries per size. */
|
|
std::vector<size_t> free_size;
|
|
};
|
|
|
|
/**
|
|
* Space granularity statistics. For each space the statistics record the
|
|
* space name, the amount of allocated memory and overall used memory for the
|
|
* space. The statistics also contain statistics for each of the space's
|
|
* pages, its freelist and the objects allocated on the space.
|
|
*/
|
|
struct SpaceStatistics {
|
|
/** The space name */
|
|
std::string name;
|
|
/** Overall committed amount of memory for the heap. */
|
|
size_t committed_size_bytes = 0;
|
|
/** Resident amount of memory held by the heap. */
|
|
size_t resident_size_bytes = 0;
|
|
/** Amount of memory actually used on the space. */
|
|
size_t used_size_bytes = 0;
|
|
/** Statistics for each of the pages in the space. */
|
|
std::vector<PageStatistics> page_stats;
|
|
/** Statistics for the freelist of the space. */
|
|
FreeListStatistics free_list_stats;
|
|
};
|
|
|
|
/** Overall committed amount of memory for the heap. */
|
|
size_t committed_size_bytes = 0;
|
|
/** Resident amount of memory help by the heap. */
|
|
size_t resident_size_bytes = 0;
|
|
/** Amount of memory actually used on the heap. */
|
|
size_t used_size_bytes = 0;
|
|
/** Detail level of this HeapStatistics. */
|
|
DetailLevel detail_level;
|
|
|
|
/** Statistics for each of the spaces in the heap. Filled only when
|
|
* `detail_level` is `DetailLevel::kDetailed`. */
|
|
std::vector<SpaceStatistics> space_stats;
|
|
|
|
/**
|
|
* Vector of `cppgc::GarbageCollected` type names.
|
|
*/
|
|
std::vector<std::string> type_names;
|
|
};
|
|
|
|
} // namespace cppgc
|
|
|
|
#endif // INCLUDE_CPPGC_HEAP_STATISTICS_H_
|