Only do the root warning once per thread
[fio.git] / time.c
diff --git a/time.c b/time.c
index 08ef078277ba125d43d1ce956db2ea92091e0793..4fbc98bbc57f8b781d95c7a8362ce8b8ab348700 100644 (file)
--- a/time.c
+++ b/time.c
@@ -8,7 +8,7 @@ static unsigned long ns_granularity;
 
 unsigned long utime_since(struct timeval *s, struct timeval *e)
 {
-       long sec, usec;
+       long sec, usec, ret;
 
        sec = e->tv_sec - s->tv_sec;
        usec = e->tv_usec - s->tv_usec;
@@ -17,9 +17,16 @@ unsigned long utime_since(struct timeval *s, struct timeval *e)
                usec += 1000000;
        }
 
-       sec *= (double) 1000000;
+       sec *= 1000000UL;
+       ret = sec + usec;
 
-       return sec + usec;
+       /*
+        * time warp bug on some kernels?
+        */
+       if (ret < 0)
+               ret = 0;
+
+       return ret;
 }
 
 unsigned long utime_since_now(struct timeval *s)
@@ -32,7 +39,7 @@ unsigned long utime_since_now(struct timeval *s)
 
 unsigned long mtime_since(struct timeval *s, struct timeval *e)
 {
-       long sec, usec;
+       long sec, usec, ret;
 
        sec = e->tv_sec - s->tv_sec;
        usec = e->tv_usec - s->tv_usec;
@@ -41,10 +48,17 @@ unsigned long mtime_since(struct timeval *s, struct timeval *e)
                usec += 1000000;
        }
 
-       sec *= (double) 1000;
-       usec /= (double) 1000;
+       sec *= 1000UL;
+       usec /= 1000UL;
+       ret = sec + usec;
+
+       /*
+        * time warp bug on some kernels?
+        */
+       if (ret < 0)
+               ret = 0;
 
-       return sec + usec;
+       return ret;
 }
 
 unsigned long mtime_since_now(struct timeval *s)
@@ -109,22 +123,34 @@ void usec_sleep(struct thread_data *td, unsigned long usec)
 }
 
 void rate_throttle(struct thread_data *td, unsigned long time_spent,
-                  unsigned int bytes, int ddir)
+                  unsigned int bytes)
 {
        unsigned long usec_cycle;
+       unsigned int bs;
 
-       if (!td->rate)
+       if (!td->o.rate && !td->o.rate_iops)
                return;
 
-       usec_cycle = td->rate_usec_cycle * (bytes / td->min_bs[ddir]);
+       if (td_rw(td))
+               bs = td->o.rw_min_bs;
+       else if (td_read(td))
+               bs = td->o.min_bs[DDIR_READ];
+       else
+               bs = td->o.min_bs[DDIR_WRITE];
+
+       usec_cycle = td->rate_usec_cycle * (bytes / bs);
 
        if (time_spent < usec_cycle) {
                unsigned long s = usec_cycle - time_spent;
 
                td->rate_pending_usleep += s;
+
                if (td->rate_pending_usleep >= 100000) {
+                       struct timeval t;
+
+                       fio_gettime(&t, NULL);
                        usec_sleep(td, td->rate_pending_usleep);
-                       td->rate_pending_usleep = 0;
+                       td->rate_pending_usleep -= utime_since_now(&t);
                }
        } else {
                long overtime = time_spent - usec_cycle;
@@ -142,8 +168,6 @@ static void fio_init time_init(void)
 {
        int i;
 
-       fio_gettime(&genesis, NULL);
-
        /*
         * Check the granularity of the nanosleep function
         */
@@ -164,6 +188,11 @@ static void fio_init time_init(void)
        }
 }
 
+void set_genesis_time(void)
+{
+       fio_gettime(&genesis, NULL);
+}
+
 void fill_start_time(struct timeval *t)
 {
        memcpy(t, &genesis, sizeof(genesis));