tag lttv 0.11.3-23102008

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

diff --git a/trunk/tests/kernel/test-hpet.c b/trunk/tests/kernel/test-hpet.c
index bf0dda5c8faab65592bfaa2c290f9d984f88a481..41cebce1353094b9a868f5d331d86f9f023af813 100644 (file)
--- a/trunk/tests/kernel/test-hpet.c
+++ b/trunk/tests/kernel/test-hpet.c
@@ -9,21 +9,41 @@
 #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<1; i++) {
+       for (i=0; i < NR_LOOPS; i++) {
                //printk("time %llu\n", ltt_tsc_read());
-               //myval = ltt_tsc_read();
-               myval = hpet_readl(HPET_COUNTER);
+               //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);
+       printk("timediff %llu\n", (time2-time1)/NR_LOOPS);
+       ltt_tsc_is_sync = sync_save;
        return -EPERM;
 }