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

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
5 changed files with 25 additions and 8 deletions

View file

@ -8,6 +8,7 @@
#include "Console.h"
#include "Scheduler.h"
#include <Kernel/PCI.h>
#include <Kernel/kmalloc.h>
#include <AK/StringBuilder.h>
#include <LibC/errno_numbers.h>
@ -558,14 +559,16 @@ ByteBuffer procfs$memstat(InodeIdentifier)
{
InterruptDisabler disabler;
StringBuilder builder;
builder.appendf("%u,%u,%u,%u,%u,%u,%u\n",
builder.appendf("%u,%u,%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()
MM.m_free_supervisor_physical_pages.size(),
g_kmalloc_call_count,
g_kfree_call_count
);
return builder.to_byte_buffer();
}

View file

@ -33,6 +33,9 @@ volatile size_t sum_alloc = 0;
volatile size_t sum_free = POOL_SIZE;
volatile size_t kmalloc_sum_eternal = 0;
dword g_kmalloc_call_count;
dword g_kfree_call_count;
static byte* s_next_eternal_ptr;
static byte* s_end_of_eternal_range;
@ -90,6 +93,7 @@ void* kmalloc_page_aligned(size_t size)
void* kmalloc_impl(size_t size)
{
InterruptDisabler disabler;
++g_kmalloc_call_count;
// We need space for the allocation_t structure at the head of the block.
size_t real_size = size + sizeof(allocation_t);
@ -153,6 +157,7 @@ void* kmalloc_impl(size_t size)
void kfree(void *ptr)
{
++g_kfree_call_count;
if (!ptr)
return;

View file

@ -18,6 +18,8 @@ extern volatile size_t sum_alloc;
extern volatile size_t sum_free;
extern volatile size_t kmalloc_sum_eternal;
extern volatile size_t kmalloc_sum_page_aligned;
extern dword g_kmalloc_call_count;
extern dword g_kfree_call_count;
inline void* operator new(size_t, void* p) { return p; }
inline void* operator new[](size_t, void* p) { return p; }