From 8dd5f9aaad6a4d587a67500eca0449ec69b7d7bd Mon Sep 17 00:00:00 2001
From: compudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Date: Mon, 7 Apr 2008 15:00:21 +0000
Subject: [PATCH] runtest

git-svn-id: http://ltt.polymtl.ca/svn@2841 04897980-b3bd-0310-b5e0-8ef037075253
---
 markers-test/Makefile                |   1 +
 markers-test/runtest.sh              |  12 ++++
 markers-test/test-mark-speed-empty.c | 103 +++++++++++++++++++++++++++
 3 files changed, 116 insertions(+)
 create mode 100644 markers-test/test-mark-speed-empty.c

diff --git a/markers-test/Makefile b/markers-test/Makefile
index 7b599935..a727d022 100644
--- a/markers-test/Makefile
+++ b/markers-test/Makefile
@@ -1,5 +1,6 @@
 ifneq ($(KERNELRELEASE),)
 	obj-m += test-mark-speed.o
+	obj-m += test-mark-speed-empty.o
 	obj-m += test-mark-speed-edit.o
 	obj-m += test-mark-speed-opt.o
 else
diff --git a/markers-test/runtest.sh b/markers-test/runtest.sh
index e62d589c..79b26b80 100644
--- a/markers-test/runtest.sh
+++ b/markers-test/runtest.sh
@@ -1,5 +1,10 @@
 #!/bin/sh
 
+insmod test-mark-speed-empty.ko
+for a in `seq 1 10`; do cat /proc/testmark;done
+rmmod test-mark-speed-empty
+RESEMP=`dmesg |tail -n 10 |sed 's/^\[.*\] cycles : \(.*\)$/\1/'`
+
 insmod test-mark-speed.ko
 for a in `seq 1 10`; do cat /proc/testmark;done
 rmmod test-mark-speed
@@ -17,6 +22,13 @@ RESNOP=`dmesg |tail -n 10|sed 's/^\[.*\] cycles : \(.*\)$/\1/'`
 
 echo "20000 iterations"
 
+echo "Numbers for empty loop"
+
+SUM="0"
+for a in $RESEMP; do SUM=$[$SUM + $a]; done
+RESEMP=$[$SUM / 10]
+
+
 echo "Numbers for normal marker"
 
 SUM="0"
diff --git a/markers-test/test-mark-speed-empty.c b/markers-test/test-mark-speed-empty.c
new file mode 100644
index 00000000..943af27d
--- /dev/null
+++ b/markers-test/test-mark-speed-empty.c
@@ -0,0 +1,103 @@
+/* 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>
+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)
+{
+	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<20000; 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");
+
-- 
2.34.1