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| Current File : //proc/self/root/home/ubuntu/node-v16.18.1/test/pummel/test-process-cpuUsage.js |
'use strict';
require('../common');
const assert = require('assert');
const start = process.cpuUsage();
// Run a busy-loop for specified # of milliseconds.
const RUN_FOR_MS = 500;
// Define slop factor for checking maximum expected diff values.
const SLOP_FACTOR = 2;
// Run a busy loop.
const now = Date.now();
while (Date.now() - now < RUN_FOR_MS);
// Get a diff reading from when we started.
const diff = process.cpuUsage(start);
const MICROSECONDS_PER_MILLISECOND = 1000;
// Diff usages should be >= 0, <= ~RUN_FOR_MS millis.
// Let's be generous with the slop factor, defined above, in case other things
// are happening on this CPU. The <= check may be invalid if the node process
// is making use of multiple CPUs, in which case, just remove it.
assert(diff.user >= 0);
assert(diff.user <= SLOP_FACTOR * RUN_FOR_MS * MICROSECONDS_PER_MILLISECOND);
assert(diff.system >= 0);
assert(diff.system <= SLOP_FACTOR * RUN_FOR_MS * MICROSECONDS_PER_MILLISECOND);
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