From 230e7cb0bab4582132de2bc411e355eacbacff4a Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 8 Apr 2022 08:10:32 +0200
Subject: Add phase switch contention to build statistics

---
 libbuild2/context.cxx | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'libbuild2/context.cxx')

diff --git a/libbuild2/context.cxx b/libbuild2/context.cxx
index 80343bd..d460fa7 100644
--- a/libbuild2/context.cxx
+++ b/libbuild2/context.cxx
@@ -765,6 +765,8 @@ namespace build2
       }
       else if (ctx_.phase != n)
       {
+        ++contention;
+
         ctx_.sched.deactivate (false /* external */);
         for (; ctx_.phase != n; v->wait (l)) ;
         r = !fail_;
@@ -781,6 +783,8 @@ namespace build2
     {
       if (!lm_.try_lock ())
       {
+        ++contention;
+
         ctx_.sched.deactivate (false /* external */);
         lm_.lock ();
         ctx_.sched.activate (false /* external */);
@@ -901,6 +905,8 @@ namespace build2
       }
       else // phase != n
       {
+        ++contention;
+
         ctx_.sched.deactivate (false /* external */);
         for (; ctx_.phase != n; v->wait (l)) ;
         r = !fail_;
@@ -913,6 +919,8 @@ namespace build2
     {
       if (!lm_.try_lock ())
       {
+        ++contention;
+
         ctx_.sched.deactivate (false /* external */);
         lm_.lock ();
         ctx_.sched.activate (false /* external */);
-- 
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