move everything out of trunk

[lttv.git] / tests / kernel / test-hpet.c

diff --git a/tests/kernel/test-hpet.c b/tests/kernel/test-hpet.c
new file mode 100644 (file)
index 0000000..41cebce
--- /dev/null
+++ b/tests/kernel/test-hpet.c
@@ -0,0 +1,60 @@
+/* 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>
+#include <linux/clocksource.h>
+#include <linux/ltt.h>
+#include <asm/cacheflush.h>
+
+//#define NR_LOOPS 10000
+#define NR_LOOPS 10
+
+extern cycle_t read_hpet(void);
+
+static int __init test_init(void)
+{
+       int i;
+       cycles_t time1, time2;
+       volatile unsigned long myval;
+       int sync_save;  /* racy */
+
+       sync_save = ltt_tsc_is_sync;
+       ltt_tsc_is_sync = 0;
+       //ltt_tsc_is_sync = 1;
+       return -EPERM; //TEST !
+       myval = ltt_get_timestamp64();
+       time1 = get_cycles();
+       for (i=0; i < NR_LOOPS; i++) {
+               //printk("time %llu\n", ltt_tsc_read());
+               //get_cycles_barrier();
+               //myval = get_cycles();
+               //get_cycles_barrier();
+               myval = read_hpet();
+               //clflush(&ltt_last_tsc);
+               //myval = ltt_get_timestamp64();
+               printk("val : %llu\n", (unsigned long long)myval);
+       }
+       time2 = get_cycles();
+       printk("timediff %llu\n", (time2-time1)/NR_LOOPS);
+       ltt_tsc_is_sync = sync_save;
+       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");
+