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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RESOURCE_ATTRIBUTION_ATTRIBUTION_HELPERS_H_
#define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RESOURCE_ATTRIBUTION_ATTRIBUTION_HELPERS_H_
#include "base/check.h"
#include "base/functional/function_ref.h"
#include "components/performance_manager/public/graph/process_node.h"
#include "content/public/common/process_type.h"
namespace performance_manager {
class FrameNode;
class WorkerNode;
} // namespace performance_manager
namespace resource_attribution {
// Splits a resource of type T between all frames and workers hosted in
// `process_node`. `frame_setter` or `worker_setter` will be called for each
// node with that node's fraction of `resource_value`.
template <typename T,
// Template parameters are used to alias FrameNode and WorkerNode
// without introducing them into the resource_attribution namespace.
typename FrameNode = performance_manager::FrameNode,
typename WorkerNode = performance_manager::WorkerNode,
typename FrameSetter = base::FunctionRef<void(const FrameNode*, T)>,
typename WorkerSetter = base::FunctionRef<void(const WorkerNode*, T)>>
void SplitResourceAmongFramesAndWorkers(
T resource_value,
const performance_manager::ProcessNode* process_node,
FrameSetter frame_setter,
WorkerSetter worker_setter);
// Implementation
template <typename T,
typename FrameNode,
typename WorkerNode,
typename FrameSetter,
typename WorkerSetter>
void SplitResourceAmongFramesAndWorkers(
T resource_value,
const performance_manager::ProcessNode* process_node,
FrameSetter frame_setter,
WorkerSetter worker_setter) {
// Attribute the resources of the process to its frames and workers
// Only renderers can host frames and workers.
CHECK(process_node);
if (process_node->GetProcessType() != content::PROCESS_TYPE_RENDERER) {
return;
}
const auto frame_nodes = process_node->GetFrameNodes();
const auto worker_nodes = process_node->GetWorkerNodes();
const size_t frame_and_worker_node_count =
frame_nodes.size() + worker_nodes.size();
if (frame_and_worker_node_count == 0) {
return;
}
// For now, equally split the process' resources among all of its frames and
// workers.
const T resource_estimate_part = resource_value / frame_and_worker_node_count;
for (const FrameNode* frame : frame_nodes) {
frame_setter(frame, resource_estimate_part);
}
for (const WorkerNode* worker : worker_nodes) {
worker_setter(worker, resource_estimate_part);
}
}
} // namespace resource_attribution
#endif // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RESOURCE_ATTRIBUTION_ATTRIBUTION_HELPERS_H_
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