73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
/*
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* Copyright (C) 2025 The Android Open Source Project
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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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* http://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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*/
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#pragma once
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#include <cstdint>
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#include <functional>
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#include <map>
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namespace android::drm_hwcomposer {
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struct CompositionStats {
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uint32_t total_frames = 0;
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uint64_t total_pixops = 0;
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uint64_t gpu_pixops = 0;
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uint32_t failed_kms_validate = 0;
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uint32_t failed_kms_present = 0;
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uint32_t frames_flattened = 0;
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uint32_t cursor_plane_frames = 0;
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uint32_t failed_kms_cursor_validate = 0;
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// When adding new stats, update the operator- below as well as
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// operator== and operator<< which are implemented in the unit test file.
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};
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// Used for calculating the delta between two CompositionStats.
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CompositionStats operator-(const CompositionStats& a,
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const CompositionStats& b);
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// Interface for a reporter of per-display CompositionStats.
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class CompositionStatsProvider {
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public:
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// Get cumulative stats per display.
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virtual auto PullCompositionStats()
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-> std::map<int64_t, CompositionStats> = 0;
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virtual ~CompositionStatsProvider() = default;
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};
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// CompositionStatsTracker pulls stats from a CompositionStatsProvider on-demand
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// and keeps track of the previous stats state in order to calculate the deltas.
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class CompositionStatsTracker {
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public:
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// Arguments are the display ID, the cumulative stats, and the stats delta.
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using Callback = std::function<void(int64_t display_handle,
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const CompositionStats& cumulative,
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const CompositionStats& delta)>;
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explicit CompositionStatsTracker(CompositionStatsProvider* provider)
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: provider_(provider) {
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}
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// Callback will be called for each display, with the cumulative
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// stats and the stats delta from the previous invocation.
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void ReportStats(const Callback& callback);
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private:
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CompositionStatsProvider* provider_;
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std::map<int64_t, CompositionStats> previous_stats_;
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};
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} // namespace android::drm_hwcomposer
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