Abseil Common Libraries (C++) (grcp 依赖)
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88 lines
3.4 KiB
88 lines
3.4 KiB
// Copyright 2019 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#ifndef ABSL_STRINGS_INTERNAL_CORDZ_STATISTICS_H_ |
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#define ABSL_STRINGS_INTERNAL_CORDZ_STATISTICS_H_ |
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#include <cstdint> |
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#include "absl/base/config.h" |
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#include "absl/strings/internal/cordz_update_tracker.h" |
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namespace absl { |
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ABSL_NAMESPACE_BEGIN |
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namespace cord_internal { |
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// CordzStatistics captures some meta information about a Cord's shape. |
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struct CordzStatistics { |
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using MethodIdentifier = CordzUpdateTracker::MethodIdentifier; |
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// Node counts information |
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struct NodeCounts { |
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size_t flat = 0; // #flats |
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size_t flat_64 = 0; // #flats up to 64 bytes |
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size_t flat_128 = 0; // #flats up to 128 bytes |
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size_t flat_256 = 0; // #flats up to 256 bytes |
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size_t flat_512 = 0; // #flats up to 512 bytes |
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size_t flat_1k = 0; // #flats up to 1K bytes |
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size_t external = 0; // #external reps |
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size_t substring = 0; // #substring reps |
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size_t concat = 0; // #concat reps |
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size_t ring = 0; // #ring buffer reps |
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size_t btree = 0; // #btree reps |
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size_t crc = 0; // #crc reps |
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}; |
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// The size of the cord in bytes. This matches the result of Cord::size(). |
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size_t size = 0; |
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// The estimated memory used by the sampled cord. This value matches the |
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// value as reported by Cord::EstimatedMemoryUsage(). |
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// A value of 0 implies the property has not been recorded. |
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size_t estimated_memory_usage = 0; |
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// The effective memory used by the sampled cord, inversely weighted by the |
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// effective indegree of each allocated node. This is a representation of the |
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// fair share of memory usage that should be attributed to the sampled cord. |
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// This value is more useful for cases where one or more nodes are referenced |
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// by multiple Cord instances, and for cases where a Cord includes the same |
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// node multiple times (either directly or indirectly). |
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// A value of 0 implies the property has not been recorded. |
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size_t estimated_fair_share_memory_usage = 0; |
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// The total number of nodes referenced by this cord. |
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// For ring buffer Cords, this includes the 'ring buffer' node. |
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// For btree Cords, this includes all 'CordRepBtree' tree nodes as well as all |
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// the substring, flat and external nodes referenced by the tree. |
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// A value of 0 implies the property has not been recorded. |
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size_t node_count = 0; |
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// Detailed node counts per type |
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NodeCounts node_counts; |
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// The cord method responsible for sampling the cord. |
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MethodIdentifier method = MethodIdentifier::kUnknown; |
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// The cord method responsible for sampling the parent cord if applicable. |
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MethodIdentifier parent_method = MethodIdentifier::kUnknown; |
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// Update tracker tracking invocation count per cord method. |
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CordzUpdateTracker update_tracker; |
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}; |
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} // namespace cord_internal |
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ABSL_NAMESPACE_END |
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} // namespace absl |
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#endif // ABSL_STRINGS_INTERNAL_CORDZ_STATISTICS_H_
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