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bogdan-iancubogdan-iancu
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[tm] added statistics to report retransmissions and timeouts
retransmission_req_T1_1 retransmission_req_T1_2 retransmission_req_T1_3 retransmission_req_T2 retransmission_rpl_T2 timeout_finalresponse timeout_finalresponse_inv
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‎modules/tm/doc/tm_admin.xml‎

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@@ -2180,6 +2180,59 @@ if (is_method("ACK|CANCEL") && !t_check_trans()) {
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Number of transactions existing in memory at current time.
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</para>
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</section>
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<section id="stat_retransmission_req_T1_1" xreflabel="retransmission_req_T1_1">
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<title>retransmission_req_T1_1</title>
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<para>
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Number of request retransmissions due to T1 1 timer,
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the first retransmission interval (typical 500ms).
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</para>
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</section>
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<section id="stat_retransmission_req_T1_2" xreflabel="retransmission_req_T1_2">
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<title>retransmission_req_T1_2</title>
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<para>
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Number of request retransmissions due to T1 2 timer,
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the second retransmission interval (typical 1s).
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</para>
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</section>
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<section id="stat_retransmission_req_T1_3" xreflabel="retransmission_req_T1_3">
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<title>retransmission_req_T1_3</title>
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<para>
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Number of request retransmissions due to T1 3 timer,
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the third retransmission interval (typical 2s).
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</para>
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</section>
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<section id="stat_retransmission_req_T2" xreflabel="retransmission_req_T2">
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<title>retransmission_req_T2</title>
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<para>
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Number of request retransmissions due to T2 ,
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the final retransmission interval (typical 4s).
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</para>
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</section>
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<section id="stat_retransmission_rpl_T2" xreflabel="retransmission_rpl_T2">
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<title>retransmission_rpl_T2</title>
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<para>
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Number of reply retransmissions, all done with the same
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retransmission interval T2, typical 4s.
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</para>
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</section>
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<section id="stat_timeout_finalresponse" xreflabel="timeout_finalresponse">
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<title>timeout_finalresponse</title>
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<para>
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Number of transactional timeouts without receiving any kind of reply (not
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even provisional) from the B side. Such timeouts indicate a
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communication / reachability issue. Note: a single transaction may count
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multiple such timeouts due forking.
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</para>
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</section>
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<section id="stat_timeout_finalresponse_inc" xreflabel="timeout_finalresponse">
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<title>timeout_finalresponse</title>
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<para>
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Number of transactional INVITE timeouts without receiving a FINAL reply
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(provisional may be received) from the B side. Such timeouts indicate a
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"not answer" event and it is not a signalling issue.
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Note: a single transaction may count multiple such timeouts due forking.
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</para>
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</section>
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</section>
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</chapter>

‎modules/tm/t_stats.h‎

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Original file line numberDiff line numberDiff line change
@@ -46,6 +46,14 @@ extern stat_var *tm_trans_5xx;
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extern stat_var *tm_trans_6xx;
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extern stat_var *tm_trans_inuse;
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extern stat_var *tm_retran_req_T11;
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extern stat_var *tm_retran_req_T12;
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extern stat_var *tm_retran_req_T13;
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extern stat_var *tm_retran_req_T2;
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extern stat_var *tm_retran_rpl_T2;
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extern stat_var *tm_timeout_fr;
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extern stat_var *tm_timeout_fr_inv;
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extern stat_var *tm_cluster_reply_tx;
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extern stat_var *tm_cluster_request_tx;
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extern stat_var *tm_cluster_cancel_tx;

‎modules/tm/timer.c‎

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Original file line numberDiff line numberDiff line change
@@ -111,6 +111,7 @@
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#include "t_funcs.h"
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#include "t_reply.h"
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#include "t_cancel.h"
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#include "t_stats.h"
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static struct timer_table *timertable=0;
@@ -303,12 +304,20 @@ inline static void retransmission_handler( struct timer_link *retr_tl )
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}
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set_t(T_UNDEFINED);
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switch(r_buf->retr_list) {
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case RT_T1_TO_1: update_stat( tm_retran_req_T11, 1); break;
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case RT_T1_TO_2: update_stat( tm_retran_req_T12, 1); break;
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case RT_T1_TO_3: update_stat( tm_retran_req_T13, 1); break;
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case RT_T2: update_stat( tm_retran_req_T2, 1);break;
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default:;
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}
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} else {
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LM_DBG("retransmission_handler : reply resending "
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"(t=%p, %.9s ... )\n", r_buf->my_T, r_buf->buffer.s);
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set_t(r_buf->my_T);
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t_retransmit_reply(r_buf->my_T);
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set_t(T_UNDEFINED);
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update_stat( tm_retran_rpl_T2, 1);
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}
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id = r_buf->retr_list;
@@ -398,6 +407,12 @@ inline static void final_response_handler( struct timer_link *fr_tl )
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cancel_uacs(t, cancel_bitmap );
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set_cancel_extra_hdrs( NULL, 0);
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}
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switch(r_buf->retr_list) {
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case FR_TIMER_LIST: update_stat( tm_timeout_fr, 1); break;
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case FR_INV_TIMER_LIST: update_stat( tm_timeout_fr_inv, 1); break;
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default:;
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}
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/* lock reply processing to determine how to proceed reliably */
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LOCK_REPLIES( t );
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LM_DBG("Cancel sent out, sending 408 (%p)\n", t);

‎modules/tm/tm.c‎

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Original file line numberDiff line numberDiff line change
@@ -175,6 +175,14 @@ stat_var *tm_trans_5xx;
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stat_var *tm_trans_6xx;
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stat_var *tm_trans_inuse;
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stat_var *tm_retran_req_T11;
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stat_var *tm_retran_req_T12;
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stat_var *tm_retran_req_T13;
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stat_var *tm_retran_req_T2;
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stat_var *tm_retran_rpl_T2;
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stat_var *tm_timeout_fr;
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stat_var *tm_timeout_fr_inv;
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stat_var *tm_cluster_reply_tx;
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stat_var *tm_cluster_request_tx;
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stat_var *tm_cluster_cancel_tx;
@@ -343,6 +351,13 @@ static const stat_export_t mod_stats[] = {
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{"cluster_reply_recv" , 0, &tm_cluster_reply_rx },
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{"cluster_request_recv" ,0, &tm_cluster_request_rx },
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{"cluster_cancel_recv" , 0, &tm_cluster_cancel_rx },
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{"retransmission_req_T1_1" , 0, &tm_retran_req_T11 },
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{"retransmission_req_T1_2" , 0, &tm_retran_req_T12 },
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{"retransmission_req_T1_3" , 0, &tm_retran_req_T13 },
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{"retransmission_req_T2" , 0, &tm_retran_req_T2 },
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{"retransmission_rpl_T2" , 0, &tm_retran_rpl_T2 },
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{"timeout_finalresponse" , 0, &tm_timeout_fr },
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{"timeout_finalresponse_inv" , 0, &tm_timeout_fr_inv },
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{0,0,0}
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};
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