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test: fix races in test-performance-eventlooputil #36028

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test: fix races in test-performance-eventlooputil #36028

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20 changes: 10 additions & 10 deletions test/parallel/test-performance-eventlooputil.js
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Original file line number Diff line number Diff line change
Expand Up @@ -23,28 +23,28 @@ if (nodeTiming.loopStart === -1) {
}

setTimeout(mustCall(function r() {
const t = Date.now();
const elu1 = eventLoopUtilization();

@trevnorris trevnorris Nov 9, 2020 •
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I messed up here. elu1 also shouldn't be captured until after some idleTime has accumulated. This function call was only meant supposed to check if .active was being set correctly.

The reason for forcing idleTime to accumulate before the test ran was so it would execute the same running it directly or running with ./tools/test.py --worker.


// Force idle time to accumulate before allowing test to continue.
if (elu1.idle <= 0)
return setTimeout(mustCall(r), 5);

const t = Date.now();
while (Date.now() - t < SPIN_DUR) { }

const elu2 = eventLoopUtilization();
const elu3 = eventLoopUtilization(elu1);
const elu4 = eventLoopUtilization(elu2, elu1);
const elu2 = eventLoopUtilization(elu1);
const elu3 = eventLoopUtilization();
const elu4 = eventLoopUtilization(elu3, elu1);

assert.strictEqual(elu3.idle, 0);
assert.strictEqual(elu2.idle, 0);
assert.strictEqual(elu4.idle, 0);
assert.strictEqual(elu3.utilization, 1);
assert.strictEqual(elu2.utilization, 1);
assert.strictEqual(elu4.utilization, 1);
assert.strictEqual(elu2.active - elu1.active, elu4.active);
assert.ok(elu3.active > SPIN_DUR - 10, `${elu3.active} <= ${SPIN_DUR - 10}`);
assert.strictEqual(elu3.active - elu1.active, elu4.active);
assert.ok(elu2.active > SPIN_DUR - 10, `${elu2.active} <= ${SPIN_DUR - 10}`);
assert.ok(elu2.active < elu4.active, `${elu2.active} >= ${elu4.active}`);
assert.ok(elu3.active > elu2.active, `${elu3.active} <= ${elu2.active}`);
assert.ok(elu3.active > elu4.active, `${elu3.active} <= ${elu4.active}`);
assert.ok(elu2.active > elu3.active, `${elu2.active} <= ${elu3.active}`);
assert.ok(elu2.active > elu4.active, `${elu2.active} <= ${elu4.active}`);

setTimeout(mustCall(runIdleTimeTest), TIMEOUT);
}), 5);
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