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#include "MemoryStatsWidget.h"
#include "GraphWidget.h"
#include <AK/JsonObject.h>
#include <LibGUI/GBoxLayout.h>
#include <LibGUI/GLabel.h>
#include <LibGUI/GPainter.h>
#include <LibDraw/StylePainter.h>
#include <stdio.h>
#include <stdlib.h>
MemoryStatsWidget::MemoryStatsWidget(GraphWidget& graph, GWidget* parent)
: GWidget(parent)
, m_graph(graph)
, m_proc_memstat("/proc/memstat")
{
if (!m_proc_memstat.open(CIODevice::OpenMode::ReadOnly))
ASSERT_NOT_REACHED();
set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
set_preferred_size(0, 72);
set_layout(make<GBoxLayout>(Orientation::Vertical));
layout()->set_margins({ 0, 8, 0, 0 });
layout()->set_spacing(3);
auto build_widgets_for_label = [this](const String& description) -> ObjectPtr<GLabel> {
auto container = GWidget::construct(this);
container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
container->set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
container->set_preferred_size(275, 12);
auto description_label = GLabel::construct(description, container);
description_label->set_font(Font::default_bold_font());
description_label->set_text_alignment(TextAlignment::CenterLeft);
auto label = GLabel::construct(container);
label->set_text_alignment(TextAlignment::CenterRight);
return label;
};
m_user_physical_pages_label = build_widgets_for_label("Userspace physical:");
m_supervisor_physical_pages_label = build_widgets_for_label("Supervisor physical:");
m_kmalloc_label = build_widgets_for_label("Kernel heap:");
m_kmalloc_count_label = build_widgets_for_label("Calls kmalloc/kfree:");
refresh();
}
MemoryStatsWidget::~MemoryStatsWidget()
{
}
static inline size_t page_count_to_kb(size_t kb)
{
return (kb * 4096) / 1024;
}
static inline size_t bytes_to_kb(size_t bytes)
{
return bytes / 1024;
}
void MemoryStatsWidget::refresh()
{
m_proc_memstat.seek(0);
auto file_contents = m_proc_memstat.read_all();
auto json = JsonValue::from_string(file_contents).as_object();
unsigned kmalloc_eternal_allocated = json.get("kmalloc_eternal_allocated").to_u32();
(void)kmalloc_eternal_allocated;
unsigned kmalloc_allocated = json.get("kmalloc_allocated").to_u32();
unsigned kmalloc_available = json.get("kmalloc_available").to_u32();
unsigned user_physical_allocated = json.get("user_physical_allocated").to_u32();
unsigned user_physical_available = json.get("user_physical_available").to_u32();
unsigned super_physical_alloc = json.get("super_physical_allocated").to_u32();
unsigned super_physical_free = json.get("super_physical_available").to_u32();
unsigned kmalloc_call_count = json.get("kmalloc_call_count").to_u32();
unsigned kfree_call_count = json.get("kfree_call_count").to_u32();
size_t kmalloc_sum_available = kmalloc_allocated + kmalloc_available;
size_t user_pages_available = user_physical_allocated + user_physical_available;
size_t supervisor_pages_available = super_physical_alloc + super_physical_free;
m_kmalloc_label->set_text(String::format("%uK/%uK", bytes_to_kb(kmalloc_allocated), bytes_to_kb(kmalloc_sum_available)));
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)));
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)));
m_kmalloc_count_label->set_text(String::format("%u/%u (+%u)", kmalloc_call_count, kfree_call_count, kmalloc_call_count - kfree_call_count));
m_graph.set_max(page_count_to_kb(user_pages_available));
m_graph.add_value(page_count_to_kb(user_physical_allocated));
}
void MemoryStatsWidget::timer_event(CTimerEvent&)
{
refresh();
}
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