mirror of https://gitee.com/openkylin/nodejs.git
85 lines
2.7 KiB
JavaScript
85 lines
2.7 KiB
JavaScript
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'use strict';
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const common = require('../common');
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const assert = require('assert');
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const cp = require('child_process');
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const fs = require('fs');
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const path = require('path');
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const tmpdir = require('../common/tmpdir');
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if (process.argv[2] === 'child') {
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const { performance } = require('perf_hooks');
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// Will emit mark and measure trace events
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performance.mark('A');
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setTimeout(() => {
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performance.mark('B');
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performance.measure('A to B', 'A', 'B');
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}, 1);
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// Intentional non-op, part of the test
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function f() {}
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const ff = performance.timerify(f);
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ff(); // Will emit a timerify trace event
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} else {
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tmpdir.refresh();
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const expectedMarks = ['A', 'B'];
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const expectedBegins = [
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{ cat: 'node,node.perf,node.perf.timerify', name: 'f' },
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{ cat: 'node,node.perf,node.perf.usertiming', name: 'A to B' }
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];
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const expectedEnds = [
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{ cat: 'node,node.perf,node.perf.timerify', name: 'f' },
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{ cat: 'node,node.perf,node.perf.usertiming', name: 'A to B' }
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];
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const proc = cp.fork(__filename,
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[
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'child'
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], {
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cwd: tmpdir.path,
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execArgv: [
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'--trace-event-categories',
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'node.perf'
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]
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});
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proc.once('exit', common.mustCall(() => {
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const file = path.join(tmpdir.path, 'node_trace.1.log');
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assert(fs.existsSync(file));
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fs.readFile(file, common.mustCall((err, data) => {
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const traces = JSON.parse(data.toString()).traceEvents
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.filter((trace) => trace.cat !== '__metadata');
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assert.strictEqual(traces.length,
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expectedMarks.length +
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expectedBegins.length +
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expectedEnds.length);
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traces.forEach((trace) => {
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assert.strictEqual(trace.pid, proc.pid);
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switch (trace.ph) {
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case 'R':
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assert.strictEqual(trace.cat,
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'node,node.perf,node.perf.usertiming');
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assert.strictEqual(trace.name,
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expectedMarks.shift());
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break;
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case 'b':
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const expectedBegin = expectedBegins.shift();
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assert.strictEqual(trace.cat, expectedBegin.cat);
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assert.strictEqual(trace.name, expectedBegin.name);
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break;
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case 'e':
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const expectedEnd = expectedEnds.shift();
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assert.strictEqual(trace.cat, expectedEnd.cat);
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assert.strictEqual(trace.name, expectedEnd.name);
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break;
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default:
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assert.fail('Unexpected trace event phase');
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}
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});
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}));
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}));
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}
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