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ProcessManager: Show some basic system memory stats below the process table.

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This really improves the feeling of "system overview" :^)
This commit is contained in:
Andreas Kling 2019-03-10 12:13:22 +01:00
parent 8017c1e17c
commit 37388b311f
9 changed files with 158 additions and 9 deletions
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6
Kernel/MemoryManager.cpp
View file

@ -12,6 +12,8 @@
//#define PAGE_FAULT_DEBUG
static MemoryManager* s_the;
unsigned MemoryManager::s_user_physical_pages_in_existence;
unsigned MemoryManager::s_super_physical_pages_in_existence;
MemoryManager& MM
{
@ -686,6 +688,10 @@ PhysicalPage::PhysicalPage(PhysicalAddress paddr, bool supervisor, bool may_retu
, m_supervisor(supervisor)
, m_paddr(paddr)
{
if (supervisor)
++MemoryManager::s_super_physical_pages_in_existence;
else
++MemoryManager::s_user_physical_pages_in_existence;
}
void PhysicalPage::return_to_freelist()

7
Kernel/MemoryManager.h
View file

@ -228,6 +228,7 @@ class MemoryManager {
friend class Region;
friend class VMObject;
friend ByteBuffer procfs$mm(InodeIdentifier);
friend ByteBuffer procfs$memstat(InodeIdentifier);
public:
[[gnu::pure]] static MemoryManager& the();
@ -254,6 +255,9 @@ public:
size_t ram_size() const { return m_ram_size; }
int user_physical_pages_in_existence() const { return s_user_physical_pages_in_existence; }
int super_physical_pages_in_existence() const { return s_super_physical_pages_in_existence; }
private:
MemoryManager();
~MemoryManager();
@ -383,6 +387,9 @@ private:
dword* m_pte;
};
static unsigned s_user_physical_pages_in_existence;
static unsigned s_super_physical_pages_in_existence;
PageTableEntry ensure_pte(PageDirectory&, LinearAddress);
RetainPtr<PageDirectory> m_kernel_page_directory;

18
Kernel/ProcFS.cpp
View file

@ -31,6 +31,7 @@ enum ProcFileType {
FI_Root_df,
FI_Root_kmalloc,
FI_Root_all,
FI_Root_memstat,
FI_Root_summary,
FI_Root_cpuinfo,
FI_Root_inodes,
@ -537,6 +538,22 @@ ByteBuffer procfs$summary(InodeIdentifier)
return builder.to_byte_buffer();
}
ByteBuffer procfs$memstat(InodeIdentifier)
{
InterruptDisabler disabler;
StringBuilder builder;
builder.appendf("%u,%u,%u,%u,%u,%u,%u\n",
kmalloc_sum_eternal,
sum_alloc,
sum_free,
MM.user_physical_pages_in_existence() - MM.m_free_physical_pages.size(),
MM.m_free_physical_pages.size(),
MM.super_physical_pages_in_existence() - MM.m_free_supervisor_physical_pages.size(),
MM.m_free_supervisor_physical_pages.size()
);
return builder.to_byte_buffer();
}
ByteBuffer procfs$all(InodeIdentifier)
{
InterruptDisabler disabler;
@ -1112,6 +1129,7 @@ ProcFS::ProcFS()
m_entries[FI_Root_df] = { "df", FI_Root_df, procfs$df };
m_entries[FI_Root_kmalloc] = { "kmalloc", FI_Root_kmalloc, procfs$kmalloc };
m_entries[FI_Root_all] = { "all", FI_Root_all, procfs$all };
m_entries[FI_Root_memstat] = { "memstat", FI_Root_memstat, procfs$memstat };
m_entries[FI_Root_summary] = { "summary", FI_Root_summary, procfs$summary };
m_entries[FI_Root_cpuinfo] = { "cpuinfo", FI_Root_cpuinfo, procfs$cpuinfo};
m_entries[FI_Root_inodes] = { "inodes", FI_Root_inodes, procfs$inodes };