Include engines in dependency check
[fio.git] / time.c
diff --git a/time.c b/time.c
index ad5ee3fe51773c9019067f593834428afad8fc9b..08ef078277ba125d43d1ce956db2ea92091e0793 100644 (file)
--- a/time.c
+++ b/time.c
@@ -4,10 +4,11 @@
 #include "fio.h"
 
 static struct timeval genesis;
+static unsigned long ns_granularity;
 
 unsigned long utime_since(struct timeval *s, struct timeval *e)
 {
-       double sec, usec;
+       long sec, usec;
 
        sec = e->tv_sec - s->tv_sec;
        usec = e->tv_usec - s->tv_usec;
@@ -21,17 +22,17 @@ unsigned long utime_since(struct timeval *s, struct timeval *e)
        return sec + usec;
 }
 
-static unsigned long utime_since_now(struct timeval *s)
+unsigned long utime_since_now(struct timeval *s)
 {
        struct timeval t;
 
-       gettimeofday(&t, NULL);
+       fio_gettime(&t, NULL);
        return utime_since(s, &t);
 }
 
 unsigned long mtime_since(struct timeval *s, struct timeval *e)
 {
-       double sec, usec;
+       long sec, usec;
 
        sec = e->tv_sec - s->tv_sec;
        usec = e->tv_usec - s->tv_usec;
@@ -49,8 +50,9 @@ unsigned long mtime_since(struct timeval *s, struct timeval *e)
 unsigned long mtime_since_now(struct timeval *s)
 {
        struct timeval t;
+       void *p = __builtin_return_address(0);
 
-       gettimeofday(&t, NULL);
+       fio_gettime(&t, p);
        return mtime_since(s, &t);
 }
 
@@ -66,47 +68,55 @@ void __usec_sleep(unsigned int usec)
 {
        struct timeval start;
 
-       gettimeofday(&start, NULL);
+       fio_gettime(&start, NULL);
        while (utime_since_now(&start) < usec)
                nop;
 }
 
 void usec_sleep(struct thread_data *td, unsigned long usec)
 {
-       struct timespec req, rem;
-
-       req.tv_sec = usec / 1000000;
-       req.tv_nsec = usec * 1000 - req.tv_sec * 1000000;
+       struct timespec req;
+       struct timeval tv;
 
        do {
-               if (usec < 5000) {
+               unsigned long ts = usec;
+
+               if (usec < ns_granularity) {
                        __usec_sleep(usec);
                        break;
                }
 
-               rem.tv_sec = rem.tv_nsec = 0;
-               if (nanosleep(&req, &rem) < 0)
-                       break;
+               ts = usec - ns_granularity;
+
+               if (ts >= 1000000) {
+                       req.tv_sec = ts / 1000000;
+                       ts -= 1000000 * req.tv_sec;
+               } else
+                       req.tv_sec = 0;
 
-               if ((rem.tv_sec + rem.tv_nsec) == 0)
+               req.tv_nsec = ts * 1000;
+               fio_gettime(&tv, NULL);
+
+               if (nanosleep(&req, NULL) < 0)
                        break;
 
-               req.tv_nsec = rem.tv_nsec;
-               req.tv_sec = rem.tv_sec;
+               ts = utime_since_now(&tv);
+               if (ts >= usec)
+                       break;
 
-               usec = rem.tv_sec * 1000000 + rem.tv_nsec / 1000;
+               usec -= ts;
        } while (!td->terminate);
 }
 
 void rate_throttle(struct thread_data *td, unsigned long time_spent,
-                  unsigned int bytes)
+                  unsigned int bytes, int ddir)
 {
        unsigned long usec_cycle;
 
        if (!td->rate)
                return;
 
-       usec_cycle = td->rate_usec_cycle * (bytes / td->min_bs);
+       usec_cycle = td->rate_usec_cycle * (bytes / td->min_bs[ddir]);
 
        if (time_spent < usec_cycle) {
                unsigned long s = usec_cycle - time_spent;
@@ -128,7 +138,33 @@ unsigned long mtime_since_genesis(void)
        return mtime_since_now(&genesis);
 }
 
-void time_init(void)
+static void fio_init time_init(void)
+{
+       int i;
+
+       fio_gettime(&genesis, NULL);
+
+       /*
+        * Check the granularity of the nanosleep function
+        */
+       for (i = 0; i < 10; i++) {
+               struct timeval tv;
+               struct timespec ts;
+               unsigned long elapsed;
+
+               fio_gettime(&tv, NULL);
+               ts.tv_sec = 0;
+               ts.tv_nsec = 1000;
+
+               nanosleep(&ts, NULL);
+               elapsed = utime_since_now(&tv);
+
+               if (elapsed > ns_granularity)
+                       ns_granularity = elapsed;
+       }
+}
+
+void fill_start_time(struct timeval *t)
 {
-       gettimeofday(&genesis, NULL);
+       memcpy(t, &genesis, sizeof(genesis));
 }