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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.
124 lines
4.5 KiB
C++
124 lines
4.5 KiB
C++
/*
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* Copyright (c) 2018-2020, 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 "TimelineTrack.h"
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#include "Histogram.h"
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#include "Profile.h"
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#include "TimelineView.h"
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#include <LibGUI/Painter.h>
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#include <LibGfx/Font.h>
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#include <LibGfx/Palette.h>
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namespace Profiler {
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TimelineTrack::TimelineTrack(TimelineView const& view, Profile const& profile, Process const& process)
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: m_view(view)
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, m_profile(profile)
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, m_process(process)
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{
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set_fill_with_background_color(true);
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set_background_role(Gfx::ColorRole::Base);
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set_fixed_height(40);
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set_fixed_width(m_profile.length_in_ms() / 10);
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set_frame_thickness(1);
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}
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TimelineTrack::~TimelineTrack()
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{
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}
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void TimelineTrack::event(Core::Event& event)
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{
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switch (event.type()) {
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case GUI::Event::MouseUp:
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case GUI::Event::MouseDown:
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case GUI::Event::MouseMove:
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event.ignore();
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default:
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break;
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}
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GUI::Frame::event(event);
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}
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void TimelineTrack::paint_event(GUI::PaintEvent& event)
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{
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GUI::Frame::paint_event(event);
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GUI::Painter painter(*this);
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painter.add_clip_rect(event.rect());
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const u64 start_of_trace = m_profile.first_timestamp();
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const u64 end_of_trace = start_of_trace + m_profile.length_in_ms();
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const auto clamp_timestamp = [start_of_trace, end_of_trace](u64 timestamp) -> u64 {
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return min(end_of_trace, max(timestamp, start_of_trace));
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};
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float column_width = (float)frame_inner_rect().width() / (float)m_profile.length_in_ms();
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size_t columns = frame_inner_rect().width() / column_width;
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Histogram kernel_histogram { start_of_trace, end_of_trace, columns };
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Histogram usermode_histogram { start_of_trace, end_of_trace, columns };
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auto bucket_count = kernel_histogram.size();
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for (auto& event : m_profile.events()) {
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if (event.pid != m_process.pid)
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continue;
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if (!m_process.valid_at(event.timestamp))
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continue;
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if (!m_profile.show_scheduler() && !event.frames.is_empty()) {
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auto top_frame = event.frames[event.frames.size() - 1];
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if (top_frame.symbol == "Kernel::Scheduler::yield()")
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continue;
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}
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auto& histogram = event.in_kernel ? kernel_histogram : usermode_histogram;
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histogram.insert(clamp_timestamp(event.timestamp), 1 + event.lost_samples);
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}
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decltype(kernel_histogram.at(0)) max_value = 0;
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for (size_t bucket = 0; bucket < bucket_count; bucket++) {
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auto value = kernel_histogram.at(bucket) + usermode_histogram.at(bucket);
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if (value > max_value)
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max_value = value;
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}
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float frame_height = (float)frame_inner_rect().height() / (float)max_value;
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for (size_t bucket = 0; bucket < bucket_count; bucket++) {
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auto kernel_value = kernel_histogram.at(bucket);
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auto usermode_value = usermode_histogram.at(bucket);
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if (kernel_value + usermode_value == 0)
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continue;
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auto t = bucket;
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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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int kernel_column_height = frame_inner_rect().height() - (int)((float)kernel_value * frame_height);
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int usermode_column_height = frame_inner_rect().height() - (int)((float)(kernel_value + usermode_value) * frame_height);
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constexpr auto kernel_color = Color::from_rgb(0xc25e5a);
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constexpr auto usermode_color = Color::from_rgb(0x5a65c2);
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painter.fill_rect({ x, frame_thickness() + usermode_column_height, cw, height() - frame_thickness() * 2 }, usermode_color);
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painter.fill_rect({ x, frame_thickness() + kernel_column_height, cw, height() - frame_thickness() * 2 }, kernel_color);
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}
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u64 normalized_start_time = clamp_timestamp(min(m_view.select_start_time(), m_view.select_end_time()));
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u64 normalized_end_time = clamp_timestamp(max(m_view.select_start_time(), m_view.select_end_time()));
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u64 normalized_hover_time = clamp_timestamp(m_view.hover_time());
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int select_start_x = (int)((float)(normalized_start_time - start_of_trace) * column_width);
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int select_end_x = (int)((float)(normalized_end_time - start_of_trace) * column_width);
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int select_hover_x = (int)((float)(normalized_hover_time - start_of_trace) * column_width);
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painter.fill_rect({ select_start_x, frame_thickness(), select_end_x - select_start_x, height() - frame_thickness() * 2 }, Color(0, 0, 0, 60));
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painter.fill_rect({ select_hover_x, frame_thickness(), 1, height() - frame_thickness() * 2 }, Color::NamedColor::Black);
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}
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}
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