From 12b8274f1b591638f847397625699699f9e44423 Mon Sep 17 00:00:00 2001
From: compudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Date: Wed, 13 Aug 2008 16:55:31 +0000
Subject: [PATCH] update test

git-svn-id: http://ltt.polymtl.ca/svn@3012 04897980-b3bd-0310-b5e0-8ef037075253
---
 trunk/tests/kernel/Makefile         |  13 ++--
 trunk/tests/kernel/test-nop-speed.c | 104 ++++++++++++++++++++++++++++
 2 files changed, 111 insertions(+), 6 deletions(-)
 create mode 100644 trunk/tests/kernel/test-nop-speed.c

diff --git a/trunk/tests/kernel/Makefile b/trunk/tests/kernel/Makefile
index a246c501..5d68be3a 100644
--- a/trunk/tests/kernel/Makefile
+++ b/trunk/tests/kernel/Makefile
@@ -14,12 +14,13 @@ ifneq ($(CONFIG_LTT),)
 endif
 	#obj-m += test-sys_call.o
 #	obj-m += test-bug.o
-	obj-m += test-cmpxchg-nolock2.o
-	obj-m += test-trace-speed.o
-	obj-m += test-rcu-speed.o
-	obj-m += test-fct-speed.o
-	obj-m += test-int3-speed.o
-	obj-m += test-kprobes2.o
+	obj-m += test-nop-speed.o
+#	obj-m += test-cmpxchg-nolock2.o
+#	obj-m += test-trace-speed.o
+#	obj-m += test-rcu-speed.o
+#	obj-m += test-fct-speed.o
+#	obj-m += test-int3-speed.o
+#	obj-m += test-kprobes2.o
 	#obj-m += test-mark-speed.o
 	#obj-m += test-mark-speed-edit.o
 	#obj-m += test-mark-speed-opt.o
diff --git a/trunk/tests/kernel/test-nop-speed.c b/trunk/tests/kernel/test-nop-speed.c
new file mode 100644
index 00000000..f75af525
--- /dev/null
+++ b/trunk/tests/kernel/test-nop-speed.c
@@ -0,0 +1,104 @@
+/* test-nop-speed.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>
+
+#define NR_TESTS 20000
+
+struct proc_dir_entry *pentry = NULL;
+
+void empty(void)
+{
+	asm volatile ("");
+}
+
+void twobytesjump(void)
+{
+	asm volatile ("jmp 1f\n\t"
+		".byte 0x00, 0x00, 0x00\n\t"
+		"1:\n\t");
+}
+
+void fivebytesjump(void)
+{
+	asm (".byte 0xe9, 0x00, 0x00, 0x00, 0x00\n\t");
+}
+
+void threetwonops(void)
+{
+	asm (".byte 0x66,0x66,0x90,0x66,0x90\n\t");
+}
+
+void fivebytesnop(void)
+{
+	asm (".byte 0x66,0x66,0x66,0x66,0x90\n\t");
+}
+
+void fivebytespsixnop(void)
+{
+	asm (".byte 0x0f,0x1f,0x44,0x00,0\n\t");
+}
+
+void perform_test(const char *name, void (*callback)(void))
+{
+	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<NR_TESTS; i++) {
+		callback();
+	}
+	rdtsc_barrier();
+	cycles2 = get_cycles();
+	rdtsc_barrier();
+	local_irq_restore(flags);
+	printk("test %s cycles : %llu\n", name, cycles2-cycles1);
+}
+
+static int my_open(struct inode *inode, struct file *file)
+{
+	printk("NR_TESTS %d\n", NR_TESTS);
+
+	perform_test("empty", empty);
+	perform_test("2-bytes jump", twobytesjump);
+	perform_test("5-bytes jump", fivebytesjump);
+	perform_test("3/2 nops", threetwonops);
+	perform_test("5-bytes nop with long prefix", fivebytesnop);
+	perform_test("5-bytes P6 nop", fivebytespsixnop);
+
+	return -EPERM;
+}
+
+
+static struct file_operations my_operations = {
+	.open = my_open,
+};
+
+int init_module(void)
+{
+	pentry = create_proc_entry("testnops", 0444, NULL);
+	if (pentry)
+		pentry->proc_fops = &my_operations;
+
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	remove_proc_entry("testnops", NULL);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("Marker Test");
+
-- 
2.34.1