| 1 | /* test-mark.c |
| 2 | * |
| 3 | */ |
| 4 | |
| 5 | #include <linux/module.h> |
| 6 | #include <linux/proc_fs.h> |
| 7 | #include <linux/sched.h> |
| 8 | #include <linux/timex.h> |
| 9 | #include <linux/marker.h> |
| 10 | #include <asm/ptrace.h> |
| 11 | |
| 12 | //asm volatile (""); |
| 13 | struct proc_dir_entry *pentry = NULL; |
| 14 | |
| 15 | static inline void test(unsigned long arg) |
| 16 | { |
| 17 | //asm volatile (""); |
| 18 | trace_mark(test_marker, "arg1 %lu arg2 %p", arg, current); |
| 19 | } |
| 20 | |
| 21 | static int my_open(struct inode *inode, struct file *file) |
| 22 | { |
| 23 | unsigned int i; |
| 24 | cycles_t cycles1, cycles2; |
| 25 | unsigned long flags; |
| 26 | |
| 27 | local_irq_save(flags); |
| 28 | rdtsc_barrier(); |
| 29 | cycles1 = get_cycles(); |
| 30 | rdtsc_barrier(); |
| 31 | for(i=0; i<20000; i++) { |
| 32 | test(i); |
| 33 | } |
| 34 | rdtsc_barrier(); |
| 35 | cycles2 = get_cycles(); |
| 36 | rdtsc_barrier(); |
| 37 | local_irq_restore(flags); |
| 38 | printk("cycles : %llu\n", cycles2-cycles1); |
| 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 | |