Detect and print when the OS doesn't support huge pages

[fio.git] / time.c

diff --git a/time.c b/time.c
index c5b67ff11e88eac9205359fb1c09bb3fa4db3fe7..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)
@@ -114,15 +128,15 @@ void rate_throttle(struct thread_data *td, unsigned long time_spent,
        unsigned long usec_cycle;
        unsigned int bs;
 
-       if (!td->rate && !td->rate_iops)
+       if (!td->o.rate && !td->o.rate_iops)
                return;
 
        if (td_rw(td))
-               bs = td->rw_min_bs;
+               bs = td->o.rw_min_bs;
        else if (td_read(td))
-               bs = td->min_bs[DDIR_READ];
+               bs = td->o.min_bs[DDIR_READ];
        else
-               bs = td->min_bs[DDIR_WRITE];
+               bs = td->o.min_bs[DDIR_WRITE];
 
        usec_cycle = td->rate_usec_cycle * (bytes / bs);
 
@@ -130,9 +144,13 @@ void rate_throttle(struct thread_data *td, unsigned long time_spent,
                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;