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 #include <asm/system.h>
13 static void noinline
test2(const struct marker
*mdata
,
14 void *call_private
, ...)
21 * Generic marker flavor always available.
22 * Note : the empty asm volatile with read constraint is used here instead of a
23 * "used" attribute to fix a gcc 4.1.x bug.
24 * Make sure the alignment of the structure in the __markers section will
25 * not add unwanted padding between the beginning of the section and the
26 * structure. Force alignment to the same alignment as the section start.
28 #define __my_trace_mark(generic, name, call_private, format, args...) \
30 static const char __mstrtab_##name[] \
31 __attribute__((section("__markers_strings"))) \
32 = #name "\0" format; \
33 static struct marker __mark_##name \
34 __attribute__((section("__markers"), aligned(8))) = \
35 { __mstrtab_##name, &__mstrtab_##name[sizeof(#name)], \
36 0, 0, marker_probe_cb, \
37 { __mark_empty_function, NULL}, NULL }; \
38 __mark_check_format(format, ## args); \
40 if (unlikely(imv_read(__mark_##name.state))) \
42 (&__mark_##name, call_private, \
45 if (unlikely(_imv_read(__mark_##name.state))) \
47 (&__mark_##name, call_private, \
53 struct proc_dir_entry
*pentry
= NULL
;
56 int temp
[8192] __cacheline_aligned
;
59 static inline void test(unsigned long arg
, unsigned long arg2
)
64 temp
[2] = (temp
[0] + 60) << 10;
65 temp
[3] = (temp
[2] + 60) << 10;
66 temp
[4] = (temp
[3] + 60) << 10;
67 temp
[0] = (temp
[4] + 60) << 10;
70 __my_trace_mark(1, kernel_debug_test
, NULL
, "%d %d %ld %ld", 2, current
->pid
, arg
, arg2
);
72 //__my_trace_mark(0, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
75 static int my_open(struct inode
*inode
, struct file
*file
)
78 cycles_t cycles1
, cycles2
;
81 local_irq_save(flags
);
83 wbinvd(); /* initial write back, without cycle count */
84 msleep(20); /* wait for L2 flush */
87 cycles1
= get_cycles();
89 for(i
=0; i
<2000; i
++) {
102 cycles2
= get_cycles();
104 local_irq_restore(flags
);
105 printk("cycles : %llu\n", cycles2
-cycles1
);
110 static struct file_operations my_operations
= {
114 int init_module(void)
116 pentry
= create_proc_entry("testmark", 0444, NULL
);
118 pentry
->proc_fops
= &my_operations
;
123 void cleanup_module(void)
125 remove_proc_entry("testmark", NULL
);
128 MODULE_LICENSE("GPL");
129 MODULE_AUTHOR("Mathieu Desnoyers");
130 MODULE_DESCRIPTION("Marker Test");
131 MODULE_VERSION("1.0");