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https://github.com/SerenityOS/serenity
synced 2024-10-08 17:09:41 +00:00
ProfileViewer: Convert the JSON samples into a more efficient format
Only do the conversion from JSON once. This makes it much faster to do time range filtering with the timeline widget. :^)
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063fef312e
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@ -11,14 +11,30 @@ Profile::Profile(const JsonArray& json)
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m_last_timestamp = m_json.at(m_json.size() - 1).as_object().get("timestamp").to_number<u64>();
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m_model = ProfileModel::create(*this);
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rebuild_tree();
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m_sample_data.ensure_capacity(m_json.size());
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m_json.for_each([&](const JsonValue& sample) {
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u64 timestamp = sample.as_object().get("timestamp").to_number<u64>() - m_first_timestamp;
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bool in_kernel = sample.as_object().get("frames").as_array().at(1).as_object().get("address").to_number<u32>() < (8 * MB);
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m_sample_data.append({ timestamp, in_kernel });
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});
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m_samples.ensure_capacity(m_json.size());
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for (auto& sample_value : m_json.values()) {
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auto& sample_object = sample_value.as_object();
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Sample sample;
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sample.timestamp = sample_object.get("timestamp").to_number<u64>();
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sample.in_kernel = sample_object.get("frames").as_array().at(1).as_object().get("address").to_number<u32>() < (8 * MB);
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auto frames_value = sample_object.get("frames");
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auto& frames_array = frames_value.as_array();
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for (int i = frames_array.size() - 1; i >= 0; --i) {
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auto& frame_value = frames_array.at(i);
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auto& frame_object = frame_value.as_object();
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Frame frame;
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frame.symbol = frame_object.get("symbol").as_string_or({});
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frame.address = frame_object.get("address").as_u32();
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frame.offset = frame_object.get("offset").as_u32();
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sample.frames.append(move(frame));
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};
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m_samples.append(move(sample));
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}
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rebuild_tree();
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}
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Profile::~Profile()
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@ -46,35 +62,32 @@ void Profile::rebuild_tree()
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return new_root;
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};
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m_json.for_each([&](const JsonValue& sample) {
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for (auto& sample : m_samples) {
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if (has_timestamp_filter_range()) {
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auto timestamp = sample.as_object().get("timestamp").to_number<u64>();
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auto timestamp = sample.timestamp;
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if (timestamp < m_timestamp_filter_range_start || timestamp > m_timestamp_filter_range_end)
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return;
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continue;
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}
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auto frames_value = sample.as_object().get("frames");
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auto& frames = frames_value.as_array();
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ProfileNode* node = nullptr;
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for (int i = frames.size() - 1; i >= 0; --i) {
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auto& frame = frames.at(i);
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for (int i = 0; i < sample.frames.size(); ++i) {
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auto& frame = sample.frames.at(i);
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auto symbol = frame.as_object().get("symbol").as_string_or({});
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auto address = frame.as_object().get("address").as_u32();
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auto offset = frame.as_object().get("offset").as_u32();
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auto timestamp = frame.as_object().get("timestamp").to_number<u64>();
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auto& symbol = frame.symbol;
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auto& address = frame.address;
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auto& offset = frame.offset;
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if (symbol.is_empty())
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break;
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if (!node)
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node = &find_or_create_root(symbol, address, offset, timestamp);
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node = &find_or_create_root(symbol, address, offset, sample.timestamp);
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else
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node = &node->find_or_create_child(symbol, address, offset, timestamp);
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node = &node->find_or_create_child(symbol, address, offset, sample.timestamp);
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node->increment_sample_count();
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}
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});
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}
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for (auto& root : roots) {
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root.sort_children();
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@ -82,20 +82,19 @@ public:
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const Vector<NonnullRefPtr<ProfileNode>>& roots() const { return m_roots; }
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template<typename Callback>
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void for_each_sample(Callback callback)
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{
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m_json.for_each([&](auto& value) {
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callback(value.as_object());
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});
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}
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struct SampleData {
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u64 timestamp { 0 };
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bool in_kernel { false };
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struct Frame {
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String symbol;
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u32 address { 0 };
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u32 offset { 0 };
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};
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const Vector<SampleData>& sample_data() const { return m_sample_data; }
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struct Sample {
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u64 timestamp { 0 };
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bool in_kernel { false };
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Vector<Frame> frames;
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};
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const Vector<Sample>& samples() const { return m_samples; }
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u64 length_in_ms() const { return m_last_timestamp - m_first_timestamp; }
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u64 first_timestamp() const { return m_first_timestamp; }
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@ -116,7 +115,7 @@ private:
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u64 m_first_timestamp { 0 };
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u64 m_last_timestamp { 0 };
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Vector<SampleData> m_sample_data;
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Vector<Sample> m_samples;
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bool m_has_timestamp_filter_range { false };
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u64 m_timestamp_filter_range_start { 0 };
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@ -28,8 +28,8 @@ void ProfileTimelineWidget::paint_event(GPaintEvent& event)
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float column_width = (float)frame_inner_rect().width() / (float)m_profile.length_in_ms();
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for (auto& sample : m_profile.sample_data()) {
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u64 t = sample.timestamp;
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for (auto& sample : m_profile.samples()) {
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u64 t = sample.timestamp - m_profile.first_timestamp();
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int x = (int)((float)t * column_width);
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int cw = max(1, (int)column_width);
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