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Kernel: Add support for profiling kmalloc()/kfree()

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Gunnar Beutner 2021-05-13 13:09:00 +02:00 • committed by Andreas Kling
parent 572bbf28cc
commit 277f333b2b
10 changed files with 84 additions and 2 deletions
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18
Kernel/Heap/kmalloc.cpp
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@ -18,6 +18,7 @@
#include <Kernel/Heap/kmalloc.h>
#include <Kernel/KSyms.h>
#include <Kernel/Panic.h>
#include <Kernel/PerformanceManager.h>
#include <Kernel/Process.h>
#include <Kernel/Scheduler.h>
#include <Kernel/SpinLock.h>
@ -189,6 +190,7 @@ __attribute__((section(".heap"))) static u8 kmalloc_pool_heap[POOL_SIZE];
static size_t g_kmalloc_bytes_eternal = 0;
static size_t g_kmalloc_call_count;
static size_t g_kfree_call_count;
static size_t g_nested_kfree_calls;
bool g_dump_kmalloc_stacks;
static u8* s_next_eternal_ptr;
@ -255,6 +257,12 @@ void* kmalloc(size_t size)
PANIC("kmalloc: Out of memory (requested size: {})", size);
}
Process* current_process = Process::current();
if (!current_process && Scheduler::colonel_initialized())
current_process = Scheduler::colonel();
if (current_process)
PerformanceManager::add_kmalloc_perf_event(*current_process, size, (FlatPtr)ptr);
return ptr;
}
@ -266,8 +274,18 @@ void kfree(void* ptr)
kmalloc_verify_nospinlock_held();
ScopedSpinLock lock(s_lock);
++g_kfree_call_count;
++g_nested_kfree_calls;
if (g_nested_kfree_calls == 1) {
Process* current_process = Process::current();
if (!current_process && Scheduler::colonel_initialized())
current_process = Scheduler::colonel();
if (current_process)
PerformanceManager::add_kfree_perf_event(*current_process, 0, (FlatPtr)ptr);
}
g_kmalloc_global->m_heap.deallocate(ptr);
--g_nested_kfree_calls;
}
void* krealloc(void* ptr, size_t new_size)