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Code Issues Projects Releases Packages Wiki Activity Actions 10

Kernel+ProcessManager: Expose the number of kmalloc/kfree calls.

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This will be very helpful in tracking down unwanted kmalloc traffic. :^)
This commit is contained in:
Andreas Kling 2019-04-15 19:43:12 +02:00
parent 13041f894f
commit e9c0f4567d
Notes: sideshowbarker 2024-07-19 14:42:02 +09:00
5 changed files with 25 additions and 8 deletions
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18
Applications/ProcessManager/MemoryStatsWidget.cpp
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@ -10,7 +10,7 @@ MemoryStatsWidget::MemoryStatsWidget(GWidget* parent)
: GWidget(parent)
{
set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
set_preferred_size({ 0, 60 });
set_preferred_size({ 0, 72 });
set_layout(make<GBoxLayout>(Orientation::Vertical));
layout()->set_margins({ 0, 8, 0, 0 });
@ -20,7 +20,7 @@ MemoryStatsWidget::MemoryStatsWidget(GWidget* parent)
auto* container = new GWidget(this);
container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
container->set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
container->set_preferred_size({ 250, 12 });
container->set_preferred_size({ 255, 12 });
auto* description_label = new GLabel(description, container);
description_label->set_font(Font::default_bold_font());
description_label->set_text_alignment(TextAlignment::CenterLeft);
@ -32,6 +32,7 @@ MemoryStatsWidget::MemoryStatsWidget(GWidget* parent)
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:");
start_timer(1000);
refresh();
@ -65,7 +66,7 @@ void MemoryStatsWidget::refresh()
if (!ptr)
break;
auto parts = String(buf, Chomp).split(',');
if (parts.size() < 7)
if (parts.size() < 9)
break;
bool ok;
unsigned kmalloc_sum_eternal = parts[0].to_uint(ok);
@ -83,14 +84,19 @@ void MemoryStatsWidget::refresh()
ASSERT(ok);
unsigned supervisor_pages_free = parts[6].to_uint(ok);
ASSERT(ok);
unsigned kmalloc_call_count = parts[7].to_uint(ok);
ASSERT(ok);
unsigned kfree_call_count = parts[8].to_uint(ok);
ASSERT(ok);
size_t kmalloc_sum_available = kmalloc_sum_alloc + kmalloc_sum_free;
size_t user_pages_available = user_pages_alloc + user_pages_free;
size_t supervisor_pages_available = supervisor_pages_alloc + supervisor_pages_free;
m_kmalloc_label->set_text(String::format("%uK/%uK\n", bytes_to_kb(kmalloc_sum_alloc), bytes_to_kb(kmalloc_sum_available)));
m_user_physical_pages_label->set_text(String::format("%uK/%uK\n", page_count_to_kb(user_pages_alloc), page_count_to_kb(user_pages_available)));
m_supervisor_physical_pages_label->set_text(String::format("%uK/%uK\n", page_count_to_kb(supervisor_pages_alloc), page_count_to_kb(supervisor_pages_available)));
m_kmalloc_label->set_text(String::format("%uK/%uK", bytes_to_kb(kmalloc_sum_alloc), bytes_to_kb(kmalloc_sum_available)));
m_user_physical_pages_label->set_text(String::format("%uK/%uK", page_count_to_kb(user_pages_alloc), page_count_to_kb(user_pages_available)));
m_supervisor_physical_pages_label->set_text(String::format("%uK/%uK", page_count_to_kb(supervisor_pages_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));
break;
}