| // Copyright 2022 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/storage/blobfs/metrics/fragmentation_metrics.h" |
| |
| namespace { |
| |
| // Helper function to create histograms matching the fragmentation metric definitions in Cobalt. |
| inspect::ExponentialUintHistogram CreateHistogram(std::string_view name, inspect::Node& node) { |
| // These values must match the metric definitions in Cobalt. |
| static constexpr uint64_t kFloor = 0; |
| static constexpr uint64_t kInitialStep = 10; |
| static constexpr uint64_t kStepMultiplier = 2; |
| static constexpr size_t kBuckets = 10; |
| return node.CreateExponentialUintHistogram(name, kFloor, kInitialStep, kStepMultiplier, kBuckets); |
| } |
| |
| } // namespace |
| |
| namespace blobfs { |
| |
| FragmentationMetrics::FragmentationMetrics(inspect::Node& node) |
| : total_nodes(node.CreateUint("total_nodes", 0u)), |
| files_in_use(node.CreateUint("files_in_use", 0u)), |
| extent_containers_in_use(node.CreateUint("extent_containers_in_use", 0u)), |
| extents_per_file(CreateHistogram("extents_per_file", node)), |
| in_use_fragments(CreateHistogram("in_use_fragments", node)), |
| free_fragments(CreateHistogram("free_fragments", node)) {} |
| |
| } // namespace blobfs |
