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Unittest That Stress-Tests the VMM and PMM #341

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Merged
wipawel merged 1 commit into from
Dec 3, 2024
Merged

Unittest That Stress-Tests the VMM and PMM #341

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34 changes: 32 additions & 2 deletions tests/unittests.c
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@
#include <console.h>
#include <cpuid.h>
#include <ktf.h>
#include <lib.h>
#include <mm/pmm.h>
#include <pagetable.h>
#include <real_mode.h>
Expand Down Expand Up @@ -72,6 +73,33 @@ static unsigned long test_kernel_task_func(void *arg) {
return _ul(arg);
}

static inline uint64_t rand47(void) {
return (_ul(rand()) << 16) ^ rand();
}

#define KT2_ROUNDS 100
#define KT2_CHUNKS 10
static unsigned long test_kernel_pmm_vmm_stress_test(void *arg) {
srand(rdtsc());

uint64_t blocks[KT2_CHUNKS] = {0};

for (size_t i = 0; i < KT2_ROUNDS; i++) {
for (size_t j = 0; j < KT2_CHUNKS; j++) {
blocks[j] = rand47() & ~(PAGE_SIZE - 1);
void *res = vmap_kern_4k(_ptr(blocks[j]), get_free_frame()->mfn, L1_PROT);
ASSERT(res == _ptr(blocks[j]));
}

for (int j = 0; j < KT2_CHUNKS; j++) {
mfn_t mfn;
ASSERT(!vunmap_kern(_ptr(blocks[j]), &mfn, PAGE_ORDER_4K));
put_free_frame(mfn);
}
}
return 0;
}

static unsigned long __user_text test_user_task_func1(void *arg) {

printf(USTR("printf: %u %x %d\n"), 1234, 0x41414141, 9);
Expand Down Expand Up @@ -203,11 +231,12 @@ int unit_tests(void *_unused) {
printk("PTE: 0x%lx\n", pte2->entry);
unmap_pagetables_va(&cr3, unit_tests);

task_t *task1, *task2, *task_user1, *task_user1_se, *task_user1_int80, *task_user2,
*task_user3, *task_user4;
task_t *task1, *task2, *task3, *task_user1, *task_user1_se, *task_user1_int80,
*task_user2, *task_user3, *task_user4;

task1 = new_kernel_task("test1", test_kernel_task_func, _ptr(98));
task2 = new_kernel_task("test2", test_kernel_task_func, _ptr(-99));
task3 = new_kernel_task("test3", test_kernel_pmm_vmm_stress_test, NULL);
task_user1 = new_user_task("test1 user", test_user_task_func1, NULL);
task_user1_se =
new_user_task("test1 user sysenter", test_user_task_func1_sysenter, NULL);
Expand All @@ -230,6 +259,7 @@ int unit_tests(void *_unused) {
set_task_repeat(task1, 10);
schedule_task(task1, get_bsp_cpu());
schedule_task(task2, get_cpu(1));
schedule_task(task3, get_cpu(1));
schedule_task(task_user1, get_bsp_cpu());
schedule_task(task_user1_se, get_bsp_cpu());
schedule_task(task_user1_int80, get_bsp_cpu());
Expand Down
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