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c41f13f10b
We can lose profiling timer events for a few reasons, for example disabled interrupts or system slowness. This accounts for lost time between CPU samples by adding a field lost_samples to each profiling event which tracks how many samples were lost immediately preceding the event.
103 lines
2.5 KiB
C++
103 lines
2.5 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "SamplesModel.h"
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#include "Profile.h"
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#include <AK/StringBuilder.h>
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#include <stdio.h>
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namespace Profiler {
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SamplesModel::SamplesModel(Profile& profile)
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: m_profile(profile)
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{
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m_user_frame_icon.set_bitmap_for_size(16, Gfx::Bitmap::load_from_file("/res/icons/16x16/inspector-object.png"));
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m_kernel_frame_icon.set_bitmap_for_size(16, Gfx::Bitmap::load_from_file("/res/icons/16x16/inspector-object-red.png"));
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}
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SamplesModel::~SamplesModel()
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{
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}
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int SamplesModel::row_count(const GUI::ModelIndex&) const
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{
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return m_profile.filtered_event_indices().size();
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}
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int SamplesModel::column_count(const GUI::ModelIndex&) const
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{
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return Column::__Count;
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}
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String SamplesModel::column_name(int column) const
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{
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switch (column) {
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case Column::SampleIndex:
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return "#";
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case Column::Timestamp:
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return "Timestamp";
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case Column::ProcessID:
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return "PID";
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case Column::ThreadID:
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return "TID";
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case Column::ExecutableName:
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return "Executable";
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case Column::LostSamples:
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return "Lost Samples";
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case Column::InnermostStackFrame:
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return "Innermost Frame";
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default:
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VERIFY_NOT_REACHED();
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}
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}
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GUI::Variant SamplesModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
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{
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u32 event_index = m_profile.filtered_event_indices()[index.row()];
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auto& event = m_profile.events().at(event_index);
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if (role == GUI::ModelRole::Custom) {
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return event_index;
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}
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if (role == GUI::ModelRole::Display) {
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if (index.column() == Column::SampleIndex)
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return event_index;
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if (index.column() == Column::ProcessID)
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return event.pid;
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if (index.column() == Column::ThreadID)
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return event.tid;
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if (index.column() == Column::ExecutableName) {
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if (auto* process = m_profile.find_process(event.pid, event.timestamp))
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return process->executable;
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return "";
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}
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if (index.column() == Column::Timestamp) {
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return (u32)event.timestamp;
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}
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if (index.column() == Column::LostSamples) {
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return event.lost_samples;
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}
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if (index.column() == Column::InnermostStackFrame) {
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return event.frames.last().symbol;
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}
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return {};
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}
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return {};
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}
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void SamplesModel::update()
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{
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did_update(Model::InvalidateAllIndices);
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}
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}
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