| 1 | /* test-micro-loop-marker.c |
| 2 | * |
| 3 | * Execute a marker in a loop |
| 4 | */ |
| 5 | |
| 6 | #include <linux/marker.h> |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/proc_fs.h> |
| 9 | #include <linux/sched.h> |
| 10 | #include <asm/ptrace.h> |
| 11 | #include <linux/timex.h> |
| 12 | #include <linux/string.h> |
| 13 | |
| 14 | #define NR_LOOPS 100000 |
| 15 | |
| 16 | |
| 17 | #define COPYLEN 4096 |
| 18 | char test[COPYLEN]; |
| 19 | char src[COPYLEN] = "aaaaaaaaaaaa"; |
| 20 | |
| 21 | struct proc_dir_entry *pentry = NULL; |
| 22 | |
| 23 | static int my_open(struct inode *inode, struct file *file) |
| 24 | { |
| 25 | unsigned int i; |
| 26 | unsigned long flags; |
| 27 | cycles_t time1, time2; |
| 28 | |
| 29 | local_irq_save(flags); |
| 30 | time1 = get_cycles(); |
| 31 | for(i=0; i<NR_LOOPS; i++) { |
| 32 | MARK(subsys_mark1, "%d %p", 1, NULL); |
| 33 | //memcpy(test, src, COPYLEN); |
| 34 | } |
| 35 | time2 = get_cycles(); |
| 36 | local_irq_restore(flags); |
| 37 | printk("time delta (cycles): %llu\n", time2-time1); |
| 38 | |
| 39 | return -EPERM; |
| 40 | } |
| 41 | |
| 42 | |
| 43 | static struct file_operations my_operations = { |
| 44 | .open = my_open, |
| 45 | }; |
| 46 | |
| 47 | int init_module(void) |
| 48 | { |
| 49 | pentry = create_proc_entry("testmark", 0444, NULL); |
| 50 | if (pentry) |
| 51 | pentry->proc_fops = &my_operations; |
| 52 | |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | void cleanup_module(void) |
| 57 | { |
| 58 | remove_proc_entry("testmark", NULL); |
| 59 | } |
| 60 | |
| 61 | MODULE_LICENSE("GPL"); |
| 62 | MODULE_AUTHOR("Mathieu Desnoyers"); |
| 63 | MODULE_DESCRIPTION("Marker Test"); |
| 64 | |