route { $avp(proc_start) = $TV(Sn);
...
$avp(proc_start) = $TV(Sn);
$var(proc_diff) = ( ((( $(var(cur_time){s.select,0,.}{s.int}) - $(avp(proc_start){s.select,0,.}{s.int}) ) * 1000000) + ( $(var(cur_time){s.select,1,.}{s.int}) - $(avp(proc_start){s.select,1,.}{s.int}) ) / 1000) mod 1000 );
xlog("L_INFO", "Request processing time: $var(proc_diff) ms\n");
if(!t_relay()) sl_reply_error(); }
On 9/25/20 3:11 PM, Henning Westerholt wrote:
Hello,
you could probably combine some string transformation to get the desired result.
If your requirements are related to accounting, the acc module might bei easier to use.
Cheers,
Henning
-- Henning Westerholt - https://skalatan.de/blog/ Kamailio services - https://skalatan.de/services
*From:* sr-users sr-users-bounces@lists.kamailio.org on behalf of Chaigneau, Nicolas nicolas.chaigneau@capgemini.com *Sent:* Friday, September 25, 2020 6:34:30 PM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Computing a time difference when handling a stateless SIP request
--snip I would like to compute a time difference (with microseconds precision) when handling a stateless SIP request. --snip
Welcome!
Take a look at: https://www.kamailio.org/wiki/cookbooks/5.4.x/pseudovariables#timeval
You can get down to the microsecond level.
Thanks!
Looking at src\modules\pv\pv_time.c, it seems TV functions just use "gettimeofday". I was looking for a time difference based on a monotonically increasing clock (to avoid possible NTP drifting imprecision).
I've looked at the "benchmark" module which seems to do something like that, but I don't think I can use it for what I need...
Anyhow, I have another question. Using the TV I've come up with the following. This works, except that I don't know how to convert an int to a string padded with zeroes (e.g. 51 => "051"). Is there a transformation that allows to do that?
$var(start_time) = $TV(Sn); # allows to cache $TV(s) and $TV(u)
(...)
$var(end_time) = $TV(Sn); $var(end_s) = $TV(sn); $var(end_us) = $TV(un); $var(diff_us) = $var(end_us) - $TV(u) + (1000000 * ($var(end_s)
- $TV(s)));
# convert this to ms (integer part) and us (fractional part) $var(diff_ms) = $var(diff_us) / 1000; $var(diff_us_f) = $var(diff_us) - (1000 * $var(diff_ms));
$var(diff_ms_us) = $var(diff_ms) + "." + $var(diff_us_f); # need to format on 3 digits... can we do the equivalent of sprintf("%03u") somehow ?
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