[lttv.git] / markers-test / test-mark-speed-opt.c

/* test-mark.c
 *
 */

#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>
#include <linux/timex.h>
#include <linux/marker.h>
#include <asm/ptrace.h>
#include <asm/system.h>

static void noinline test2(const struct marker *mdata,
        void *call_private, ...)
{
	/* not called */
	printk("blah\n");
}

/*
 * Generic marker flavor always available.
 * Note : the empty asm volatile with read constraint is used here instead of a
 * "used" attribute to fix a gcc 4.1.x bug.
 * Make sure the alignment of the structure in the __markers section will
 * not add unwanted padding between the beginning of the section and the
 * structure. Force alignment to the same alignment as the section start.
 */
#define __my_trace_mark(generic, name, call_private, format, args...)	\
	do {								\
		static const char __mstrtab_##name[]			\
		__attribute__((section("__markers_strings")))		\
		= #name "\0" format;					\
		static struct marker __mark_##name			\
		__attribute__((section("__markers"), aligned(8))) =	\
		{ __mstrtab_##name, &__mstrtab_##name[sizeof(#name)],	\
		0, 0, marker_probe_cb,					\
		{ __mark_empty_function, NULL}, NULL };			\
		__mark_check_format(format, ## args);			\
		if (!generic) {						\
			if (unlikely(imv_read(__mark_##name.state)))	\
				test2			\
					(&__mark_##name, call_private,	\
					## args);		\
		} else {						\
			if (unlikely(_imv_read(__mark_##name.state)))	\
				test2			\
					(&__mark_##name, call_private,	\
					## args);		\
		}							\
	} while (0)

	//asm volatile ("");
struct proc_dir_entry *pentry = NULL;

static inline void test(unsigned long arg, unsigned long arg2)
{
#ifdef CACHEFLUSH
	wbinvd();
#endif
	//asm volatile ("");
	//__my_trace_mark(1, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
	__my_trace_mark(0, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
}

static int my_open(struct inode *inode, struct file *file)
{
	unsigned int i;
	cycles_t cycles1, cycles2;
	unsigned long flags;

	local_irq_save(flags);
	rdtsc_barrier();
	cycles1 = get_cycles();
	rdtsc_barrier();
	for(i=0; i<2000; i++) {
		test(i, i);
	}
	rdtsc_barrier();
	cycles2 = get_cycles();
	rdtsc_barrier();
	local_irq_restore(flags);
	printk("cycles : %llu\n", cycles2-cycles1);
	return -EPERM;
}


static struct file_operations my_operations = {
	.open = my_open,
};

int init_module(void)
{
	pentry = create_proc_entry("testmark", 0444, NULL);
	if (pentry)
		pentry->proc_fops = &my_operations;

	return 0;
}

void cleanup_module(void)
{
	remove_proc_entry("testmark", NULL);
}

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mathieu Desnoyers");
MODULE_DESCRIPTION("Marker Test");
MODULE_VERSION("1.0");
Commit	Line	Data
f3be6faa	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>
db68aac5	11	#include <asm/system.h>
db68aac5	12
f3be6faa	13	static void noinline test2(const struct marker *mdata,
	14	void *call_private, ...)
	15	{
	16	/* not called */
	17	printk("blah\n");
	18	}
	19
	20	/*
	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.
	27	*/
	28	#define __my_trace_mark(generic, name, call_private, format, args...) \
	29	do { \
	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); \
	39	if (!generic) { \
	40	if (unlikely(imv_read(__mark_##name.state))) \
	41	test2 \
	42	(&__mark_##name, call_private, \
	43	## args); \
	44	} else { \
	45	if (unlikely(_imv_read(__mark_##name.state))) \
	46	test2 \
	47	(&__mark_##name, call_private, \
	48	## args); \
	49	} \
	50	} while (0)
	51
	52	//asm volatile ("");
	53	struct proc_dir_entry *pentry = NULL;
	54
	55	static inline void test(unsigned long arg, unsigned long arg2)
	56	{
64242d95	57	#ifdef CACHEFLUSH
db68aac5	58	wbinvd();
64242d95	59	#endif
f3be6faa	60	//asm volatile ("");
	61	//__my_trace_mark(1, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
	62	__my_trace_mark(0, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
	63	}
	64
	65	static int my_open(struct inode inode, struct file file)
	66	{
	67	unsigned int i;
	68	cycles_t cycles1, cycles2;
	69	unsigned long flags;
	70
	71	local_irq_save(flags);
	72	rdtsc_barrier();
	73	cycles1 = get_cycles();
	74	rdtsc_barrier();
db68aac5	75	for(i=0; i<2000; i++) {
f3be6faa	76	test(i, i);
	77	}
	78	rdtsc_barrier();
	79	cycles2 = get_cycles();
	80	rdtsc_barrier();
	81	local_irq_restore(flags);
	82	printk("cycles : %llu\n", cycles2-cycles1);
	83	return -EPERM;
	84	}
	85
	86
	87	static struct file_operations my_operations = {
	88	.open = my_open,
	89	};
	90
	91	int init_module(void)
	92	{
	93	pentry = create_proc_entry("testmark", 0444, NULL);
	94	if (pentry)
	95	pentry->proc_fops = &my_operations;
	96
	97	return 0;
	98	}
	99
	100	void cleanup_module(void)
	101	{
	102	remove_proc_entry("testmark", NULL);
	103	}
	104
	105	MODULE_LICENSE("GPL");
	106	MODULE_AUTHOR("Mathieu Desnoyers");
	107	MODULE_DESCRIPTION("Marker Test");
64242d95	108	MODULE_VERSION("1.0");
f3be6faa	109