test: correct test-worker-eventlooputil

The active worker check compared the time from sending message till response arrived from worker with the complete time the worker was running till it responses to the spin request. If sending back the message is slow for some reason the test fails. Adapt the test to compare the time seen inside the worker with the time read from main thread. PR-URL: nodejs#35891 Fixes: nodejs#35844 Refs: nodejs#35886 Refs: nodejs#35664 Reviewed-By: Gireesh Punathil <[email protected]> Reviewed-By: Rich Trott <[email protected]> Backport-PR-URL: nodejs#37165
juanarbol · Mar 8, 2021 · e663156 · e663156
1 parent c5e9544
commit e663156
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Showing 2 changed files with 9 additions and 10 deletions.
diff --git a/test/parallel/test-bootstrap-modules.js b/test/parallel/test-bootstrap-modules.js
@@ -22,6 +22,7 @@ const expectedModules = new Set([
   'Internal Binding module_wrap',
   'Internal Binding native_module',
   'Internal Binding options',
+  'Internal Binding performance',
   'Internal Binding process_methods',
   'Internal Binding report',
   'Internal Binding string_decoder',

diff --git a/test/parallel/test-worker-eventlooputil.js b/test/parallel/test-worker-eventlooputil.js
@@ -34,9 +34,10 @@ function workerOnMetricsMsg(msg) {
   }
 
   if (msg.cmd === 'spin') {
+    const elu = eventLoopUtilization();
     const t = now();
     while (now() - t < msg.dur);
-    return this.postMessage(eventLoopUtilization());
+    return this.postMessage(eventLoopUtilization(elu));
   }
 }
 
@@ -50,12 +51,13 @@ let workerELU;
   if (eventLoopUtilization().idle <= 0)
     return setTimeout(mustCall(r), 5);
 
+  mainElu = eventLoopUtilization();
+
   worker = new Worker(__filename, { argv: [ 'iamalive' ] });
   metricsCh = new MessageChannel();
   worker.postMessage({ metricsCh: metricsCh.port1 }, [ metricsCh.port1 ]);
 
   workerELU = worker.performance.eventLoopUtilization;
-  mainElu = eventLoopUtilization();
   metricsCh.port2.once('message', mustCall(checkWorkerIdle));
   metricsCh.port2.postMessage({ cmd: 'elu' });
   // Make sure it's still safe to call eventLoopUtilization() after the worker
@@ -66,15 +68,10 @@ let workerELU;
   }));
 })();
 
-
 function checkWorkerIdle(wElu) {
-  const tmpMainElu = eventLoopUtilization(mainElu);
   const perfWorkerElu = workerELU();
-  const eluDiff = eventLoopUtilization(perfWorkerElu, mainElu);
+  const tmpMainElu = eventLoopUtilization(mainElu);
 
-  assert.strictEqual(idleActive(eluDiff),
-                     (perfWorkerElu.active - mainElu.active) +
-                       (perfWorkerElu.idle - mainElu.idle));
   assert.ok(idleActive(wElu) > 0, `${idleActive(wElu)} <= 0`);
   assert.ok(idleActive(workerELU(wElu)) > 0,
             `${idleActive(workerELU(wElu))} <= 0`);
@@ -104,8 +101,9 @@ function checkWorkerActive() {
     const w2 = workerELU(w);
 
     assert.ok(w2.active >= 50, `${w2.active} < 50`);
-    assert.ok(idleActive(wElu) > idleActive(w2),
-              `${idleActive(wElu)} <= ${idleActive(w2)}`);
+    assert.ok(wElu.active >= 50, `${wElu.active} < 50`);
+    assert.ok(idleActive(wElu) < idleActive(w2),
+              `${idleActive(wElu)} >= ${idleActive(w2)}`);
 
     metricsCh.port2.postMessage({ cmd: 'close' });
   });