metrics: Display more metrics.

* src/cuirass/http.scm (url-handler): Move metric page creation to ...
(metrics-page): ... this new procedure. Pass average evaluation build start
time and evaluation completion speed to "global-metrics-content".
* src/cuirass/templates.scm (make-line-chart): Add "time-x-axes?",
"xaxes-labels", "x-label" and "y-label" arguents.
(global-metrics-content): Add "avg-eval-build-start-time" and
"eval-completion-speed" arguments. Create and display two new charts from
those metrics.

src/cuirass/http.scm

@@ -235,6 +235,43 @@ Hydra format."
      ((#:name . ,(string-append "Evaluation " (number->string id)))
       (#:link . ,(string-append "/eval/" (number->string id)))))))
 
+(define* (metrics-page)
+  (html-page
+   "Global metrics"
+   (global-metrics-content
+    #:avg-eval-durations
+    (list
+     (db-get-metrics-with-id
+      'average-10-last-eval-duration-per-spec)
+     (db-get-metrics-with-id
+      'average-100-last-eval-duration-per-spec)
+     (db-get-metrics-with-id
+      'average-eval-duration-per-spec))
+    #:avg-eval-build-start-time
+    (db-get-metrics-with-id 'average-eval-build-start-time
+                            #:limit 100)
+    #:builds-per-day
+    (db-get-metrics-with-id 'builds-per-day
+                            #:limit 100)
+    #:eval-completion-speed
+    (db-get-metrics-with-id 'evaluation-completion-speed
+                            #:limit 100)
+    #:new-derivations-per-day
+    (db-get-metrics-with-id 'new-derivations-per-day
+                            #:limit 100)
+    #:pending-builds
+    (db-get-metrics-with-id 'pending-builds
+                            #:limit 100)
+    #:percentage-failed-eval
+    (list
+     (db-get-metrics-with-id
+      'percentage-failure-10-last-eval-per-spec)
+     (db-get-metrics-with-id
+      'percentage-failure-100-last-eval-per-spec)
+     (db-get-metrics-with-id
+      'percentage-failed-eval-per-spec)))
+   '()))
+
 
 ;;;
 ;;; Web server.
@@ -608,40 +645,7 @@ Hydra format."
 
     (('GET "metrics")
      (respond-html
-      (html-page
-       "Global metrics"
-       (let ((builds-per-day
-              (db-get-metrics-with-id 'builds-per-day
-                                      #:limit 10))
-             (new-derivations-per-day
-              (db-get-metrics-with-id 'new-derivations-per-day
-                                      #:limit 10))
-             (pending-builds
-              (db-get-metrics-with-id 'pending-builds
-                                      #:limit 10))
-             (avg-eval-durations
-              (list
-               (db-get-metrics-with-id
-                'average-10-last-eval-duration-per-spec)
-               (db-get-metrics-with-id
-                'average-100-last-eval-duration-per-spec)
-               (db-get-metrics-with-id
-                'average-eval-duration-per-spec)))
-            (percentage-failed-eval
-              (list
-               (db-get-metrics-with-id
-                'percentage-failure-10-last-eval-per-spec)
-               (db-get-metrics-with-id
-                'percentage-failure-100-last-eval-per-spec)
-               (db-get-metrics-with-id
-                'percentage-failed-eval-per-spec))) )
-         (global-metrics-content
-          #:avg-eval-durations avg-eval-durations
-          #:builds-per-day builds-per-day
-          #:new-derivations-per-day new-derivations-per-day
-          #:pending-builds pending-builds
-          #:percentage-failed-eval percentage-failed-eval))
-       '())))
+      (metrics-page)))
 
     (('GET "status")
      (respond-html

src/cuirass/templates.scm

@@ -830,22 +830,34 @@ and BUILD-MAX are global minimal and maximal row identifiers."
                           #:key
                           (interpolation? #t)
                           (legend? #f)
+                          (time-x-axes? #f)
+                          xaxes-labels
+                          x-label
+                          y-label
                           title
                           labels
                           colors)
-  (let* ((scales  `((xAxes
-                     . ,(vector '((type . "time")
-                                  (time . ((unit . "day")))
-                                  (display . #t)
-                                  (distribution . "series")
-                                  (scaleLabel
-                                   . ((display . #t)
-                                      (labelString . "Day"))))))
+  (let* ((normal-xAxes (vector `((type . "category")
+                                 (labels . ,xaxes-labels)
+                                 (display . #t)
+                                 (scaleLabel
+                                  . ((display . #t)
+                                     (labelString . ,x-label))))))
+         (time-xAxes (vector `((type . "time")
+                               (time . ((unit . "day")))
+                               (display . #t)
+                               (distribution . "series")
+                               (scaleLabel
+                                . ((display . #t)
+                                   (labelString . ,x-label))))))
+         (scales  `((xAxes . ,(if time-x-axes?
+                                  time-xAxes
+                                  normal-xAxes))
                     (yAxes
-                     . ,(vector '((display . #t)
+                     . ,(vector `((display . #t)
                                   (scaleLabel
                                    . ((display . #t)
-                                      (labelString . "Builds"))))))))
+                                      (labelString . ,y-label))))))))
          (chart `((type . "line")
                   (data . ((datasets
                             . ,(apply vector
@@ -872,7 +884,9 @@ window.~a = new Chart\
 
 (define* (global-metrics-content #:key
                                  avg-eval-durations
+                                 avg-eval-build-start-time
                                  builds-per-day
+                                 eval-completion-speed
                                  new-derivations-per-day
                                  pending-builds
                                  percentage-failed-eval)
@@ -902,7 +916,22 @@ window.~a = new Chart\
                    `((x . ,(* field 1000)) (y . ,value))))
                 builds)))
 
+  (define (evals->json-scm evals)
+    (apply vector
+           (map (match-lambda
+                  ((field . value)
+                   `((x . ,(number->string field)) (y . ,value))))
+                evals)))
+
+  (define (evals->labels evals)
+    (apply vector
+           (map (match-lambda
+                  ((field . value) field))
+                evals)))
+
   (let ((builds-chart "builds_per_day")
+        (build-start-chart "avg_eval_build_start_time")
+        (evaluation-speed-chart "eval_speed_chart")
         (pending-builds-chart "pending_builds"))
     `((p (@ (class "lead")) "Global metrics")
       (h6 "Average evaluation duration per specification (seconds).")
@@ -918,6 +947,12 @@ window.~a = new Chart\
       (h6 "Build speed.")
       (canvas (@ (id ,builds-chart)))
       (br)
+      (h6 "Evaluation average build start time.")
+      (canvas (@ (id ,build-start-chart)))
+      (br)
+      (h6 "Evaluation completion speed.")
+      (canvas (@ (id ,evaluation-speed-chart)))
+      (br)
       (h6 "Pending builds.")
       (canvas (@ (id ,pending-builds-chart)))
       (br)
@@ -936,13 +971,37 @@ window.~a = new Chart\
                          (list (builds->json-scm new-derivations-per-day)
                                (builds->json-scm builds-per-day))
                          #:interpolation? #f
+                         #:time-x-axes? #t
+                         #:x-label "Day"
+                         #:y-label "Builds"
                          #:title "Builds per day"
                          #:legend? #t
                          #:labels '("New derivations"
                                     "Builds completed")
                          #:colors (list "#f6dd27" "#3e95cd"))
+      ,@(make-line-chart build-start-chart
+                         (list (evals->json-scm avg-eval-build-start-time))
+                         #:xaxes-labels (evals->labels
+                                         avg-eval-build-start-time)
+                         #:x-label "Evaluations"
+                         #:y-label "Time (s)"
+                         #:title "Evaluation average build start time"
+                         #:labels '("Build start time")
+                         #:colors (list "#3e95cd"))
+      ,@(make-line-chart evaluation-speed-chart
+                         (list (evals->json-scm eval-completion-speed))
+                         #:xaxes-labels (evals->labels
+                                         eval-completion-speed)
+                         #:x-label "Evaluations"
+                         #:y-label "Speed (builds/hour)"
+                         #:title "Evaluation completion speed"
+                         #:labels '("Completion speed")
+                         #:colors (list "#3e95cd"))
       ,@(make-line-chart pending-builds-chart
                          (list (builds->json-scm pending-builds))
+                         #:time-x-axes? #t
+                         #:x-label "Day"
+                         #:y-label "Builds"
                          #:title "Pending builds"
                          #:labels '("Pending builds")
                          #:colors (list "#3e95cd")))))