mirror of
https://github.com/nodejs/node.git
synced 2024-11-22 07:37:56 +01:00
a439cf4354
PR-URL: https://github.com/nodejs/node/pull/14706 Fixes: https://github.com/nodejs/node/issues/8728 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Timothy Gu <timothygu99@gmail.com>
31 lines
969 B
JavaScript
31 lines
969 B
JavaScript
'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);
|