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