X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=stat.c;h=a84f28a58edf4069091bccf25ffc9801426ce3fb;hp=731b3036544de363e9db4a82084cce1316203d1e;hb=facba0e53b7108d70f34e3eb01b54c2efd73f5f4;hpb=690089990d051d86b4ef2b6fd5c1972c0dd4897b

diff --git a/stat.c b/stat.c
index 731b3036..a84f28a5 100644
--- a/stat.c
+++ b/stat.c
@@ -94,14 +94,26 @@ static int disk_util_exists(dev_t dev)
 
 static void disk_util_add(dev_t dev, char *path)
 {
-	struct disk_util *du = malloc(sizeof(*du));
+	struct disk_util *du, *__du;
+	struct list_head *entry;
 
+	du = malloc(sizeof(*du));
 	memset(du, 0, sizeof(*du));
 	INIT_LIST_HEAD(&du->list);
 	sprintf(du->path, "%s/stat", path);
 	du->name = strdup(basename(path));
 	du->dev = dev;
 
+	list_for_each(entry, &disk_list) {
+		__du = list_entry(entry, struct disk_util, list);
+
+		if (!strcmp(du->name, __du->name)) {
+			free(du->name);
+			free(du);
+			return;
+		}
+	}
+
 	fio_gettime(&du->time, NULL);
 	get_io_ticks(du, &du->last_dus);
 
@@ -271,7 +283,7 @@ void update_rusage_stat(struct thread_data *td)
 static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
 		    double *mean, double *dev)
 {
-	double n;
+	double n, o;
 
 	if (is->samples == 0)
 		return 0;
@@ -281,7 +293,16 @@ static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
 
 	n = (double) is->samples;
 	*mean = (double) is->val / n;
-	*dev = sqrt(((double) is->val_sq - (*mean * *mean) / n) / (n - 1));
+	*dev = 0.01;
+
+	if (n <= 1.0)
+		return 1;
+
+	o = (double) is->val_sq - ((*mean * *mean) / n);
+	if (o < 0.0)
+		*dev = -1.0;
+	else
+		*dev = sqrt(o / (n - 1.0));
 
 	return 1;
 }
@@ -372,7 +393,7 @@ static void show_thread_status(struct thread_data *td,
 
 	runtime = mtime_since(&td->epoch, &td->end_time);
 	if (runtime) {
-		double runt = runtime;
+		double runt = (double) runtime;
 
 		usr_cpu = (double) td->usr_time * 100 / runt;
 		sys_cpu = (double) td->sys_time * 100 / runt;
@@ -429,7 +450,7 @@ static void show_thread_status_terse(struct thread_data *td,
 	show_ddir_status_terse(td, rs, 1);
 
 	if (td->runtime[0] + td->runtime[1]) {
-		double runt = td->runtime[0] + td->runtime[1];
+		double runt = (double) (td->runtime[0] + td->runtime[1]);
 
 		usr_cpu = (double) td->usr_time * 100 / runt;
 		sys_cpu = (double) td->sys_time * 100 / runt;
@@ -542,7 +563,7 @@ static inline void add_stat_sample(struct io_stat *is, unsigned long val)
 }
 
 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
-			   unsigned long val, int ddir)
+			   unsigned long val, enum fio_ddir ddir)
 {
 	if (iolog->nr_samples == iolog->max_samples) {
 		int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
@@ -557,7 +578,8 @@ static void add_log_sample(struct thread_data *td, struct io_log *iolog,
 	iolog->nr_samples++;
 }
 
-void add_clat_sample(struct thread_data *td, int ddir, unsigned long msec)
+void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
+		     unsigned long msec)
 {
 	add_stat_sample(&td->clat_stat[ddir], msec);
 
@@ -565,7 +587,8 @@ void add_clat_sample(struct thread_data *td, int ddir, unsigned long msec)
 		add_log_sample(td, td->clat_log, msec, ddir);
 }
 
-void add_slat_sample(struct thread_data *td, int ddir, unsigned long msec)
+void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
+		     unsigned long msec)
 {
 	add_stat_sample(&td->slat_stat[ddir], msec);
 
@@ -573,7 +596,8 @@ void add_slat_sample(struct thread_data *td, int ddir, unsigned long msec)
 		add_log_sample(td, td->slat_log, msec, ddir);
 }
 
-void add_bw_sample(struct thread_data *td, int ddir, struct timeval *t)
+void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
+		   struct timeval *t)
 {
 	unsigned long spent = mtime_since(&td->stat_sample_time[ddir], t);
 	unsigned long rate;