mirror of
https://github.com/LadybirdBrowser/ladybird.git
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94ca55cefd
As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
125 lines
5.3 KiB
C++
125 lines
5.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "MemoryStatsWidget.h"
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#include "GraphWidget.h"
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#include <AK/JsonObject.h>
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#include <LibCore/CFile.h>
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#include <LibDraw/StylePainter.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 <stdio.h>
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#include <stdlib.h>
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static MemoryStatsWidget* s_the;
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MemoryStatsWidget* MemoryStatsWidget::the()
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{
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return s_the;
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}
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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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{
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ASSERT(!s_the);
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s_the = this;
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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) -> RefPtr<GLabel> {
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auto container = GWidget::construct(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(275, 12);
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auto description_label = GLabel::construct(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 = GLabel::construct(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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auto proc_memstat = CFile::construct("/proc/memstat");
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if (!proc_memstat->open(CIODevice::OpenMode::ReadOnly))
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ASSERT_NOT_REACHED();
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auto file_contents = 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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