c6a191ef |
1 | /* test-async-tsc.c |
2 | * |
3 | * test async tsc on AMD. |
4 | */ |
5 | |
6 | |
7 | #include <asm/atomic.h> |
8 | #include <linux/module.h> |
9 | #include <asm/timex.h> |
10 | #include <asm/hpet.h> |
11 | #include <asm/io.h> |
12 | |
13 | static int __init test_init(void) |
14 | { |
15 | int i; |
16 | cycles_t time1, time2; |
17 | volatile unsigned long myval; |
18 | |
19 | time1 = get_cycles(); |
20 | for (i=0; i<1; i++) { |
21 | //printk("time %llu\n", ltt_tsc_read()); |
22 | //myval = ltt_tsc_read(); |
23 | myval = hpet_readl(HPET_COUNTER); |
24 | } |
25 | time2 = get_cycles(); |
26 | printk("timediff %llu\n", time2-time1); |
27 | return -EPERM; |
28 | } |
29 | |
30 | static void __exit test_exit(void) |
31 | { |
32 | } |
33 | |
34 | module_init(test_init); |
35 | module_exit(test_exit); |
36 | |
37 | MODULE_LICENSE("GPL"); |
38 | MODULE_AUTHOR("Mathieu Desnoyers"); |
39 | MODULE_DESCRIPTION("sync async tsc"); |
40 | |