From: compudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Date: Mon, 19 Mar 2007 03:56:23 +0000 (+0000)
Subject: add teest tsc sync
X-Git-Tag: v0.12.20~1051
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=c6a191efd68ced074c7d401a90d93e8a8c2babcc;p=lttv.git

add teest tsc sync

git-svn-id: http://ltt.polymtl.ca/svn@2438 04897980-b3bd-0310-b5e0-8ef037075253
---

diff --git a/tests/kernel/test-hpet.c b/tests/kernel/test-hpet.c
new file mode 100644
index 00000000..bf0dda5c
--- /dev/null
+++ b/tests/kernel/test-hpet.c
@@ -0,0 +1,40 @@
+/* test-async-tsc.c
+ *
+ * test async tsc on AMD.
+ */
+
+
+#include <asm/atomic.h>
+#include <linux/module.h>
+#include <asm/timex.h>
+#include <asm/hpet.h>
+#include <asm/io.h>
+
+static int __init test_init(void)
+{
+	int i;
+	cycles_t time1, time2;
+	volatile unsigned long myval;
+
+	time1 = get_cycles();
+	for (i=0; i<1; i++) {
+		//printk("time %llu\n", ltt_tsc_read());
+		//myval = ltt_tsc_read();
+		myval = hpet_readl(HPET_COUNTER);
+	}
+	time2 = get_cycles();
+	printk("timediff %llu\n", time2-time1);
+	return -EPERM;
+}
+
+static void __exit test_exit(void)
+{
+}
+
+module_init(test_init);
+module_exit(test_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("sync async tsc");
+