RELNOTES[INC]: JSON profile: Use doubles instead of strings for counter series.

Chrome Tracing can render stacked counter series, but only handles them correctly if values are doubles (and not strings).

We want to stack action count and local action cache checks, as well as CPU usage and memory usages.

PiperOrigin-RevId: 496331067
Change-Id: I1370856c1d1f68781bde1cc68286f71a64e1a180

Author: meisterT

src/main/java/com/google/devtools/build/lib/profiler/Profiler.java

@@ -255,10 +255,16 @@ Iterable<SlowTask> getSlowestTasks() {
     }
   }
 
-  // TODO(twerth): Make use of counterValue directly in a follow-up change.
   private static final class CounterData extends TaskData {
+    private final double counterValue;
+
     public CounterData(long timeNanos, ProfilerTask type, double counterValue) {
       super(/* id= */ -1, timeNanos, type, String.valueOf(counterValue));
+      this.counterValue = counterValue;
+    }
+
+    public double getCounterValue() {
+      return counterValue;
     }
   }
 
@@ -1211,8 +1217,10 @@ public void run() {
             }
 
             if (COUNTER_TASK_TO_SERIES_NAME.containsKey(data.type)) {
+              Preconditions.checkArgument(data instanceof CounterData);
+              CounterData counterData = (CounterData) data;
               // Skip counts equal to zero. They will show up as a thin line in the profile.
-              if ("0.0".equals(data.description)) {
+              if (Math.abs(counterData.getCounterValue()) <= 0.00001) {
                 continue;
               }
               writer.setIndent("  ");
@@ -1236,7 +1244,9 @@ public void run() {
               writer.name("args");
 
               writer.beginObject();
-              writer.name(COUNTER_TASK_TO_SERIES_NAME.get(data.type)).value(data.description);
+              writer
+                  .name(COUNTER_TASK_TO_SERIES_NAME.get(data.type))
+                  .value(counterData.getCounterValue());
               writer.endObject();
 
               writer.endObject();

src/test/shell/integration/profiler_test.sh

@@ -74,15 +74,15 @@ EOF
 
 function test_metrics() {
   helper "" ""
-  expect_log 'CPU usage (Bazel).*"cpu":"[0-9.]\+"'
-  expect_log 'CPU usage (total).*"system cpu":"[0-9.]\+"'
-  expect_log 'Memory usage (Bazel).*"memory":"[0-9.]\+"'
-  expect_log 'Memory usage (total).*"system memory":"[0-9.]\+"'
+  expect_log 'CPU usage (Bazel).*"cpu":[0-9.]\+'
+  expect_log 'CPU usage (total).*"system cpu":[0-9.]\+'
+  expect_log 'Memory usage (Bazel).*"memory":[0-9.]\+'
+  expect_log 'Memory usage (total).*"system memory":[0-9.]\+'
 }
 
 function test_metrics_with_load_average() {
   helper "" "--experimental_collect_load_average_in_profiler"
-  expect_log 'System load average.*"load":"[0-9.]\+"'
+  expect_log 'System load average.*"load":[0-9.]\+'
 }
 
 run_suite "Integration tests for profiler data."