94 lines
3.8 KiB
C++
94 lines
3.8 KiB
C++
#include "MemoryStatsWidget.h"
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#include "GraphWidget.h"
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#include <AK/JsonObject.h>
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#include <LibGUI/GBoxLayout.h>
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#include <LibGUI/GLabel.h>
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#include <LibGUI/GPainter.h>
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#include <LibDraw/StylePainter.h>
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#include <stdio.h>
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#include <stdlib.h>
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MemoryStatsWidget::MemoryStatsWidget(GraphWidget& graph, GWidget* parent)
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: GWidget(parent)
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, m_graph(graph)
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, m_proc_memstat("/proc/memstat")
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{
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if (!m_proc_memstat.open(CIODevice::OpenMode::ReadOnly))
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ASSERT_NOT_REACHED();
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set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
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set_preferred_size(0, 72);
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set_layout(make<GBoxLayout>(Orientation::Vertical));
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layout()->set_margins({ 0, 8, 0, 0 });
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layout()->set_spacing(3);
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auto build_widgets_for_label = [this](const String& description) -> GLabel* {
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auto* container = new GWidget(this);
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container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
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container->set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
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container->set_preferred_size(255, 12);
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auto* description_label = new GLabel(description, container);
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description_label->set_font(Font::default_bold_font());
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description_label->set_text_alignment(TextAlignment::CenterLeft);
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auto* label = new GLabel(container);
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label->set_text_alignment(TextAlignment::CenterRight);
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return label;
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};
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m_user_physical_pages_label = build_widgets_for_label("Userspace physical:");
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m_supervisor_physical_pages_label = build_widgets_for_label("Supervisor physical:");
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m_kmalloc_label = build_widgets_for_label("Kernel heap:");
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m_kmalloc_count_label = build_widgets_for_label("Calls kmalloc/kfree:");
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refresh();
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}
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MemoryStatsWidget::~MemoryStatsWidget()
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{
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}
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static inline size_t page_count_to_kb(size_t kb)
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{
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return (kb * 4096) / 1024;
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}
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static inline size_t bytes_to_kb(size_t bytes)
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{
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return bytes / 1024;
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}
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void MemoryStatsWidget::refresh()
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{
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m_proc_memstat.seek(0);
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auto file_contents = m_proc_memstat.read_all();
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auto json = JsonValue::from_string(file_contents).as_object();
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unsigned kmalloc_eternal_allocated = json.get("kmalloc_eternal_allocated").to_u32();
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(void)kmalloc_eternal_allocated;
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unsigned kmalloc_allocated = json.get("kmalloc_allocated").to_u32();
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unsigned kmalloc_available = json.get("kmalloc_available").to_u32();
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unsigned user_physical_allocated = json.get("user_physical_allocated").to_u32();
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unsigned user_physical_available = json.get("user_physical_available").to_u32();
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unsigned super_physical_alloc = json.get("super_physical_allocated").to_u32();
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unsigned super_physical_free = json.get("super_physical_available").to_u32();
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unsigned kmalloc_call_count = json.get("kmalloc_call_count").to_u32();
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unsigned kfree_call_count = json.get("kfree_call_count").to_u32();
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size_t kmalloc_sum_available = kmalloc_allocated + kmalloc_available;
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size_t user_pages_available = user_physical_allocated + user_physical_available;
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size_t supervisor_pages_available = super_physical_alloc + super_physical_free;
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m_kmalloc_label->set_text(String::format("%uK/%uK", bytes_to_kb(kmalloc_allocated), bytes_to_kb(kmalloc_sum_available)));
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m_user_physical_pages_label->set_text(String::format("%uK/%uK", page_count_to_kb(user_physical_allocated), page_count_to_kb(user_pages_available)));
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m_supervisor_physical_pages_label->set_text(String::format("%uK/%uK", page_count_to_kb(super_physical_alloc), page_count_to_kb(supervisor_pages_available)));
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m_kmalloc_count_label->set_text(String::format("%u/%u (+%u)", kmalloc_call_count, kfree_call_count, kmalloc_call_count - kfree_call_count));
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m_graph.set_max(page_count_to_kb(user_pages_available));
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m_graph.add_value(page_count_to_kb(user_physical_allocated));
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}
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void MemoryStatsWidget::timer_event(CTimerEvent&)
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{
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refresh();
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}
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