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zwoop pushed a commit to branch 9.2.x
in repository https://gitbox.apache.org/repos/asf/trafficserver.git


The following commit(s) were added to refs/heads/9.2.x by this push:
     new 6ffbdab290 Fixes a problem which can decrement milestone metrics 
unintentionally (#10188)
6ffbdab290 is described below

commit 6ffbdab2906e15a1a6bab7288e6afbcac48808aa
Author: Leif Hedstrom <zw...@apache.org>
AuthorDate: Wed Aug 16 16:37:43 2023 -0600

    Fixes a problem which can decrement milestone metrics unintentionally 
(#10188)
    
    (cherry picked from commit 583318ac22e884830945a3ffcf831dc397685dfc)
---
 proxy/Milestones.h         |  4 ++--
 proxy/http/HttpTransact.cc | 43 +++++++++++++++++++++++--------------------
 2 files changed, 25 insertions(+), 22 deletions(-)

diff --git a/proxy/Milestones.h b/proxy/Milestones.h
index c8b3af5cbd..b50d289dcc 100644
--- a/proxy/Milestones.h
+++ b/proxy/Milestones.h
@@ -64,10 +64,10 @@ public:
    * @return The difference time in milliseconds
    */
   int64_t
-  difference_msec(T ms_start, T ms_end) const
+  difference_msec(T ms_start, T ms_end, int64_t missing = -1) const // Return 
"missing" when Milestone is not set
   {
     if (this->_milestones[static_cast<size_t>(ms_end)] == 0) {
-      return -1;
+      return missing;
     }
     return ink_hrtime_to_msec(this->_milestones[static_cast<size_t>(ms_end)] - 
this->_milestones[static_cast<size_t>(ms_start)]);
   }
diff --git a/proxy/http/HttpTransact.cc b/proxy/http/HttpTransact.cc
index 65f3b1c06a..b1095be30d 100644
--- a/proxy/http/HttpTransact.cc
+++ b/proxy/http/HttpTransact.cc
@@ -8879,37 +8879,40 @@ HttpTransact::update_size_and_time_stats(State *s, 
ink_hrtime total_time, ink_hr
   }
 
   // update milestones stats
-  HTTP_SUM_DYN_STAT(http_ua_begin_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_UA_BEGIN));
-  HTTP_SUM_DYN_STAT(http_ua_first_read_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_UA_FIRST_READ));
+  HTTP_SUM_DYN_STAT(http_ua_begin_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_UA_BEGIN, 0));
+  HTTP_SUM_DYN_STAT(http_ua_first_read_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_UA_FIRST_READ, 
0));
   HTTP_SUM_DYN_STAT(http_ua_read_header_done_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_UA_READ_HEADER_DONE));
-  HTTP_SUM_DYN_STAT(http_ua_begin_write_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_UA_BEGIN_WRITE));
-  HTTP_SUM_DYN_STAT(http_ua_close_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_UA_CLOSE));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_UA_READ_HEADER_DONE, 0));
+  HTTP_SUM_DYN_STAT(http_ua_begin_write_time_stat,
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_UA_BEGIN_WRITE, 0));
+  HTTP_SUM_DYN_STAT(http_ua_close_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_UA_CLOSE, 0));
   HTTP_SUM_DYN_STAT(http_server_first_connect_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_FIRST_CONNECT));
-  HTTP_SUM_DYN_STAT(http_server_connect_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_SERVER_CONNECT));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_FIRST_CONNECT, 0));
+  HTTP_SUM_DYN_STAT(http_server_connect_time_stat,
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_CONNECT, 0));
   HTTP_SUM_DYN_STAT(http_server_connect_end_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_CONNECT_END));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_CONNECT_END, 0));
   HTTP_SUM_DYN_STAT(http_server_begin_write_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_BEGIN_WRITE));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_BEGIN_WRITE, 0));
   HTTP_SUM_DYN_STAT(http_server_first_read_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_FIRST_READ));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_FIRST_READ, 0));
   HTTP_SUM_DYN_STAT(http_server_read_header_done_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_READ_HEADER_DONE));
-  HTTP_SUM_DYN_STAT(http_server_close_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_SERVER_CLOSE));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_SERVER_READ_HEADER_DONE, 0));
+  HTTP_SUM_DYN_STAT(http_server_close_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_SERVER_CLOSE, 
0));
   HTTP_SUM_DYN_STAT(http_cache_open_read_begin_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_CACHE_OPEN_READ_BEGIN));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_CACHE_OPEN_READ_BEGIN, 0));
   HTTP_SUM_DYN_STAT(http_cache_open_read_end_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_CACHE_OPEN_READ_END));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_CACHE_OPEN_READ_END, 0));
   HTTP_SUM_DYN_STAT(http_cache_open_write_begin_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_CACHE_OPEN_WRITE_BEGIN));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_CACHE_OPEN_WRITE_BEGIN, 0));
   HTTP_SUM_DYN_STAT(http_cache_open_write_end_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_CACHE_OPEN_WRITE_END));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_CACHE_OPEN_WRITE_END, 0));
   HTTP_SUM_DYN_STAT(http_dns_lookup_begin_time_stat,
-                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_DNS_LOOKUP_BEGIN));
-  HTTP_SUM_DYN_STAT(http_dns_lookup_end_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_DNS_LOOKUP_END));
-  HTTP_SUM_DYN_STAT(http_sm_start_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_SM_START));
-  HTTP_SUM_DYN_STAT(http_sm_finish_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_SM_FINISH));
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_DNS_LOOKUP_BEGIN, 0));
+  HTTP_SUM_DYN_STAT(http_dns_lookup_end_time_stat,
+                    milestones.difference_msec(TS_MILESTONE_SM_START, 
TS_MILESTONE_DNS_LOOKUP_END, 0));
+  HTTP_SUM_DYN_STAT(http_sm_start_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_SM_START, 0));
+  HTTP_SUM_DYN_STAT(http_sm_finish_time_stat, 
milestones.difference_msec(TS_MILESTONE_SM_START, TS_MILESTONE_SM_FINISH, 0));
 }
 
 void

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