Keep track of the number of unsupported steps

(cherry picked from commit 45ffe578b6)

src/hydra-queue-runner/dispatcher.cc

@@ -328,6 +328,8 @@ void State::abortUnsupported()
 
     std::unordered_set<Step::ptr> aborted;
 
+    size_t count = 0;
+
     for (auto & wstep : runnable2) {
         auto step(wstep.lock());
         if (!step) continue;
@@ -341,6 +343,9 @@ void State::abortUnsupported()
             }
         }
 
+        if (!supported)
+            count++;
+
         if (!supported
             && std::chrono::duration_cast<std::chrono::seconds>(now - step->state.lock()->lastSupported).count() >= maxUnsupportedTime)
         {
@@ -396,6 +401,8 @@ void State::abortUnsupported()
                 ++i;
         }
     }
+
+    nrUnsupportedSteps = count;
 }
 
 

src/hydra-queue-runner/hydra-queue-runner.cc

@@ -523,6 +523,7 @@ void State::dumpStatus(Connection & conn, bool log)
         root.attr("nrStepsCopyingTo", nrStepsCopyingTo);
         root.attr("nrStepsCopyingFrom", nrStepsCopyingFrom);
         root.attr("nrStepsWaiting", nrStepsWaiting);
+        root.attr("nrUnsupportedSteps", nrUnsupportedSteps);
         root.attr("bytesSent", bytesSent);
         root.attr("bytesReceived", bytesReceived);
         root.attr("nrBuildsRead", nrBuildsRead);

src/hydra-queue-runner/state.hh

@@ -355,6 +355,7 @@ private:
     counter nrStepsCopyingTo{0};
     counter nrStepsCopyingFrom{0};
     counter nrStepsWaiting{0};
+    counter nrUnsupportedSteps{0};
     counter nrRetries{0};
     counter maxNrRetries{0};
     counter totalStepTime{0}; // total time for steps, including closure copying

src/script/hydra-send-stats

@@ -34,6 +34,7 @@ sub sendQueueRunnerStats {
     gauge("hydra.queue.steps.unfinished", $json->{nrUnfinishedSteps});
     gauge("hydra.queue.steps.finished", $json->{nrStepsDone});
     gauge("hydra.queue.steps.retries", $json->{nrRetries});
+    gauge("hydra.queue.steps.unsupported", $json->{nrUnsupportedSteps});
     gauge("hydra.queue.steps.max_retries", $json->{maxNrRetries});
     if ($json->{nrStepsDone}) {
         gauge("hydra.queue.steps.avg_total_time", $json->{avgStepTime});