+++ /dev/null
-/* test-slub.c
- *
- * Compare local cmpxchg with irq disable / enable with cmpxchg_local for slub.
- */
-
-
-#include <linux/jiffies.h>
-#include <linux/compiler.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/calc64.h>
-#include <asm/timex.h>
-#include <asm/system.h>
-
-#define TEST_COUNT 10000
-
-extern atomic_t slub_fast_count;
-extern atomic_t slub_slow_count;
-
-static int slub_test_init(void)
-{
- void **v = kmalloc(TEST_COUNT * sizeof(void *), GFP_KERNEL);
- unsigned int i;
- cycles_t time1, time2, time;
- long rem;
- int size;
-
- printk(KERN_ALERT "test init\n");
-
- printk("Fast slub free: %u\n", atomic_read(&slub_fast_count));
- printk("Slow slub free: %u\n", atomic_read(&slub_slow_count));
- printk(KERN_ALERT "SLUB Performance testing\n");
- printk(KERN_ALERT "========================\n");
- printk(KERN_ALERT "1. Kmalloc: Repeatedly allocate then free test\n");
- for (size = 8; size <= PAGE_SIZE << 2; size <<= 1) {
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- v[i] = kmalloc(size, GFP_KERNEL);
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%i times kmalloc(%d) = \n", i, size);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
-
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- kfree(v[i]);
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%i times kfree = \n", i);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
- }
- printk("Fast slub free: %u\n", atomic_read(&slub_fast_count));
- printk("Slow slub free: %u\n", atomic_read(&slub_slow_count));
-
- printk(KERN_ALERT "2. Kmalloc: alloc/free test\n");
- for (size = 8; size <= PAGE_SIZE << 2; size <<= 1) {
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- kfree(kmalloc(size, GFP_KERNEL));
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%i times kmalloc(%d)/kfree = \n", i, size);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
- }
- printk("Fast slub free: %u\n", atomic_read(&slub_fast_count));
- printk("Slow slub free: %u\n", atomic_read(&slub_slow_count));
-#if 0
- printk(KERN_ALERT "3. kmem_cache_alloc: Repeatedly allocate then free test\n");
- for (size = 3; size <= PAGE_SHIFT; size ++) {
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- v[i] = kmem_cache_alloc(kmalloc_caches + size, GFP_KERNEL);
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%d times kmem_cache_alloc(%d) = \n", i, 1 << size);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
-
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- kmem_cache_free(kmalloc_caches + size, v[i]);
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%i times kmem_cache_free = \n", i);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
- }
-
- printk(KERN_ALERT "4. kmem_cache_alloc: alloc/free test\n");
- for (size = 3; size <= PAGE_SHIFT; size++) {
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- kmem_cache_free(kmalloc_caches + size,
- kmem_cache_alloc(kmalloc_caches + size,
- GFP_KERNEL));
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%d times kmem_cache_alloc(%d)/kmem_cache_free = \n", i, 1 << size);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
- }
- printk(KERN_ALERT "5. kmem_cache_zalloc: Repeatedly allocate then free test\n");
- for (size = 3; size <= PAGE_SHIFT; size ++) {
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- v[i] = kmem_cache_zalloc(kmalloc_caches + size, GFP_KERNEL);
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%d times kmem_cache_zalloc(%d) = \n", i, 1 << size);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
-
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- kmem_cache_free(kmalloc_caches + size, v[i]);
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%i times kmem_cache_free = \n", i);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
- }
-
- printk(KERN_ALERT "6. kmem_cache_zalloc: alloc/free test\n");
- for (size = 3; size <= PAGE_SHIFT; size++) {
- time1 = get_cycles();
- for (i = 0; i < TEST_COUNT; i++) {
- kmem_cache_free(kmalloc_caches + size,
- kmem_cache_zalloc(kmalloc_caches + size,
- GFP_KERNEL));
- }
- time2 = get_cycles();
- time = time2 - time1;
-
- printk(KERN_ALERT "%d times kmem_cache_zalloc(%d)/kmem_cache_free = \n", i, 1 << size);
- printk(KERN_ALERT "number of loops: %d\n", TEST_COUNT);
- printk(KERN_ALERT "total time: %llu\n", time);
- time = div_long_long_rem(time, TEST_COUNT, &rem);
- printk(KERN_ALERT "-> %llu cycles\n", time);
-
- }
-#endif //0
- kfree(v);
- return -EAGAIN; /* Fail will directly unload the module */
-}
-
-static void slub_test_exit(void)
-{
- printk(KERN_ALERT "test exit\n");
-}
-
-module_init(slub_test_init)
-module_exit(slub_test_exit)
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("SLUB test");
projects / lttv.git / blobdiff