Raven Scott
da9541528e
readFileCached capped at 64KB. On 56-core hosts /proc/interrupts (and similar) often exceeds that — reads were silently truncated. Buffer now grows (up to 1MB). That didn’t break system.cpu idle (aggregate line is first), but it was a real high-core regression.
45 lines
1.5 KiB
JavaScript
45 lines
1.5 KiB
JavaScript
import test from 'brittle'
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import { cpuDeltaPct } from '../server/services/collector.js'
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test('cpuDeltaPct: idle is 100 with no prev', (t) => {
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const v = cpuDeltaPct(null, { user: 1, idle: 9 })
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t.is(v.idle, 100)
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})
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test('cpuDeltaPct: bare metal percentages sum to ~100', (t) => {
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const prev = { user: 0, nice: 0, system: 0, idle: 0, iowait: 0, irq: 0, softirq: 0, steal: 0, guest: 0, guest_nice: 0 }
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const cur = { user: 20, nice: 0, system: 10, idle: 60, iowait: 10, irq: 0, softirq: 0, steal: 0, guest: 0, guest_nice: 0 }
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const v = cpuDeltaPct(prev, cur)
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t.is(v.user, 20)
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t.is(v.system, 10)
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t.is(v.idle, 60)
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t.is(v.iowait, 10)
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const sum = Object.values(v).reduce((a, b) => a + b, 0)
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t.ok(Math.abs(sum - 100) < 0.01, `sum=${sum}`)
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})
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test('cpuDeltaPct: guest already in user is not double-counted (idle stays correct)', (t) => {
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// Kernel: user includes guest. True idle should be 55%, not ~45%.
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const prev = { user: 0, nice: 0, system: 0, idle: 0, iowait: 0, irq: 0, softirq: 0, steal: 0, guest: 0, guest_nice: 0 }
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const cur = {
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user: 30, // includes 20 guest
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nice: 0,
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system: 10,
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idle: 55,
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iowait: 5,
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irq: 0,
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softirq: 0,
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steal: 0,
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guest: 20,
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guest_nice: 0,
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}
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const v = cpuDeltaPct(prev, cur)
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t.ok(Math.abs(v.idle - 55) < 1e-9, `idle=${v.idle}`)
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t.is(v.guest, 20)
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t.is(v.user, 10) // 30 - 20
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t.is(v.system, 10)
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t.is(v.iowait, 5)
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const sum = Object.values(v).reduce((a, b) => a + b, 0)
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t.ok(Math.abs(sum - 100) < 0.01, `sum=${sum}`)
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})
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