Michael Freno
b53d4add29
One-off diagnostics behind the FFTW leak fix: init/destroy x50 RSS bound, Mach VM region walker, render-churn region growth, ffmpeg decode-stream region/rss sampling.
37 lines
1.4 KiB
TypeScript
37 lines
1.4 KiB
TypeScript
/** Scratch: does the ffmpeg decode stream leak VM regions per chunk? */
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import { test, expect } from "bun:test"
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import { EpisodePcmCache } from "../src/utils/audio-pcm-cache"
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import { spawnSync } from "child_process"
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const wav = "/tmp/podtui-stream.wav"
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if (!(await Bun.file(wav).exists()) && (await Bun.$`which ffmpeg`.nothrow())) {
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await Bun.$`ffmpeg -f lavfi -i "sine=frequency=440:duration=600" -ar 22050 -ac 1 -sample_fmt s16 ${wav}`.quiet().nothrow()
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}
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function regions(): number {
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const out = spawnSync("vmmap", [String(process.pid)], { timeout: 20000 }).stdout?.toString() ?? ""
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return out.split("\n").filter((l) => l.includes("VM_ALLOCATE")).length
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}
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function rss(): number {
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return Number(spawnSync("ps", ["-o", "rss=", "-p", String(process.pid)]).stdout?.toString().trim() || 0)
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}
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test("decode stream 90s: regions and rss bounded", async () => {
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Bun.gc(true)
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await Bun.sleep(200)
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const r0 = regions(), m0 = rss()
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const pcm = new EpisodePcmCache({ url: wav })
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pcm.startDecode(0)
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const t0 = Date.now()
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while (Date.now() - t0 < 90_000) {
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await Bun.sleep(5_000)
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const pos = ((Date.now() - t0) / 1000) * 4
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pcm.readWindow(new Float64Array(512), pos)
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}
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Bun.gc(true)
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const r1 = regions(), m1 = rss()
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console.log(`stream 90s: regions ${r0}->${r1} (delta ${r1 - r0}), rss ${(m0 / 1048576) | 0}->${(m1 / 1048576) | 0}MB`)
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pcm.stop()
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expect(r1 - r0).toBeLessThan(100)
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}, 140_000)
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