[patch 3/9] fio: allow milliseconds on all time specifiers

[Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>]

From: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>

This patch allows all time specifiers to be specified down to milliseconds.
Default will stay seconds for compatibility with old configs.

It also adds documentation to the existing time units day, hour and minute.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
---

[diffstat]
  backend.c |    4 ++--
  eta.c     |   14 ++++++++------
  fio.1     |   16 ++++++++++------
  parse.c   |   48 ++++++++++++++++++++++++++++++++++--------------
  time.c    |    2 +-
  5 files changed, 55 insertions(+), 29 deletions(-)

[diff]

--- a/backend.c
+++ b/backend.c
@@ -346,7 +346,7 @@ static inline int runtime_exceeded(struc
  		return 0;
  	if (!td->o.timeout)
  		return 0;
-	if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
+	if (mtime_since(&td->epoch, t) >= td->o.timeout )
  		return 1;
   	return 0;
@@ -1783,7 +1783,7 @@ static void run_threads(void)
  			if (td->o.start_delay) {
  				spent = mtime_since_genesis();
  -				if (td->o.start_delay * 1000 > spent)
+				if (td->o.start_delay > spent)
  					continue;
  			}
  --- a/eta.c
+++ b/eta.c
@@ -174,7 +174,8 @@ static int thread_eta(struct thread_data
  			perc = 1.0;
   		if (td->o.time_based) {
-			perc_t = (double) elapsed / (double) td->o.timeout;
+			perc_t = (double) elapsed /
+					(double) (td->o.timeout / 1000);
  			if (perc_t < perc)
  				perc = perc_t;
  		}
@@ -182,8 +183,9 @@ static int thread_eta(struct thread_data
  		eta_sec = (unsigned long) (elapsed * (1.0 / perc)) - elapsed;
   		if (td->o.timeout &&
-		    eta_sec > (td->o.timeout + done_secs - elapsed))
-			eta_sec = td->o.timeout + done_secs - elapsed;
+		    eta_sec > ( (td->o.timeout / 1000) + done_secs - elapsed))
+			eta_sec = (td->o.timeout / 1000)  + done_secs
+			       		- elapsed;
  	} else if (td->runstate == TD_NOT_CREATED || td->runstate == TD_CREATED
  			|| td->runstate == TD_INITIALIZED
  			|| td->runstate == TD_SETTING_UP
@@ -197,8 +199,8 @@ static int thread_eta(struct thread_data
  		 * if given, otherwise assume it'll run at the specified rate.
  		 */
  		if (td->o.timeout) {
-			t_eta = td->o.timeout + td->o.start_delay +
-					td->o.ramp_time;
+			t_eta = (td->o.timeout + td->o.start_delay  +
+					td->o.ramp_time ) / 1000;
   			if (in_ramp_time(td)) {
  				unsigned long ramp_left;
@@ -212,7 +214,7 @@ static int thread_eta(struct thread_data
  		rate_bytes = ddir_rw_sum(td->o.rate);
  		if (rate_bytes) {
  			r_eta = (bytes_total / 1024) / rate_bytes;
-			r_eta += td->o.start_delay;
+			r_eta += td->o.start_delay / 1000;
  		}
   		if (r_eta && t_eta)
--- a/fio.1
+++ b/fio.1
@@ -121,12 +121,16 @@ String: a sequence of alphanumeric chara
  SI integer: a whole number, possibly containing a suffix denoting the 
base unit
  of the value.  Accepted suffixes are `k', 'M', 'G', 'T', and 'P', denoting
  kilo (1024), mega (1024^2), giga (1024^3), tera (1024^4), and peta 
(1024^5)
-respectively. The suffix is not case sensitive. If prefixed with '0x', the
-value is assumed to be base 16 (hexadecimal). A suffix may include a 
trailing 'b',
-for instance 'kb' is identical to 'k'. You can specify a base 10 value
-by using 'KiB', 'MiB', 'GiB', etc. This is useful for disk drives where
-values are often given in base 10 values. Specifying '30GiB' will get you
-30*1000^3 bytes.
+respectively. If prefixed with '0x', the value is assumed to be base 16
+(hexadecimal). A suffix may include a trailing 'b', for instance 'kb' is
+identical to 'k'. You can specify a base 10 value by using 'KiB', 
'MiB','GiB',
+etc. This is useful for disk drives where values are often given in base 10
+values. Specifying '30GiB' will get you 30*1000^3 bytes.
+When specifying times the default suffix meaning changes, still 
denoting the
+base unit of the value, but accepted suffixes are 'D' (days), 'H' 
(hours), 'M'
+(minutes), 'S' Seconds, 'ms' milli seconds. Time values without a unit 
specify
+seconds.
+The suffixes are not case sensitive.
  .TP
  .I bool
  Boolean: a true or false value. `0' denotes false, `1' denotes true.
--- a/parse.c
+++ b/parse.c
@@ -122,21 +122,41 @@ static void show_option_help(struct fio_
  	show_option_values(o);
  }
  -static unsigned long get_mult_time(char c)
+static unsigned long long get_mult_time(const char *str, int len)
  {
-	switch (c) {
-	case 'm':
-	case 'M':
-		return 60;
-	case 'h':
-	case 'H':
-		return 60 * 60;
-	case 'd':
-	case 'D':
-		return 24 * 60 * 60;
-	default:
-		return 1;
+	const char *p = str;
+	char *c;
+	unsigned long long mult = 1000;
+
+	/*
+         * Go forward until we hit a non-digit, or +/- sign
+         */
+	while ((p - str) <= len) {
+		if (!isdigit((int) *p) && (*p != '+') && (*p != '-'))
+			break;
+		p++;
  	}
+
+	if (!isalpha((int) *p))
+		return 1000;
+
+	c = strdup(p);
+	for (int i = 0; i < strlen(c); i++)
+		c[i] = tolower(c[i]);
+
+	if (!strncmp("ms", c, 2))
+		mult = 1;
+	else if (!strcmp("s", c))
+		mult = 1000;
+	else if (!strcmp("m", c))
+		mult = 60 * 1000;
+	else if (!strcmp("h", c))
+		mult = 60 * 60 * 1000;
+	else if (!strcmp("d", c))
+		mult = 24 * 60 * 60 * 1000;
+
+	free(c);
+	return mult;
  }
   static int is_separator(char c)
@@ -275,7 +295,7 @@ int str_to_decimal(const char *str, long
  		else
  			*val *= mult;
  	} else
-		*val *= get_mult_time(str[len - 1]);
+		*val *= get_mult_time(str, len);
   	return 0;
  }
--- a/time.c
+++ b/time.c
@@ -71,7 +71,7 @@ int ramp_time_over(struct thread_data *t
  		return 1;
   	fio_gettime(&tv, NULL);
-	if (mtime_since(&td->epoch, &tv) >= td->o.ramp_time * 1000) {
+	if (mtime_since(&td->epoch, &tv) >= td->o.ramp_time ) {
  		td->ramp_time_over = 1;
  		reset_all_stats(td);
  		td_set_runstate(td, TD_RAMP);