Function testStallThresholdMatrix

tests/perf_telemetry_test.cpp:176–226

// --- Stall threshold matrix -------------------------------------------------

void testStallThresholdMatrix()
{
    struct Case {
        const char* name;
        double justUnder;
        double justOver;
        QString expectedStallKind;
        std::function<void(double)> trigger;
    };

    // Thresholds duplicated from PerfTelemetry.cpp; if either side drifts,
    // these test values must move in lockstep.
    const std::vector<Case> cases = {
        {"panUpdate stall (8.0 ms)", 7.5, 8.5, QStringLiteral("updateSpectrum"),
            [](double v){ PerfTelemetry::instance().recordPanUpdate(v); }},
        {"waterfallUpdate stall (12.0 ms)", 11.0, 13.0, QStringLiteral("updateWaterfallRow"),
            [](double v){ PerfTelemetry::instance().recordWaterfallUpdate(v); }},
        {"render stall (16.0 ms)", 15.0, 17.0, QStringLiteral("render"),
            [](double v){ PerfTelemetry::instance().recordRender(v); }},
        {"frameAge stall (100.0 ms)", 99.0, 101.0, QStringLiteral("frameAge"),
            [](double v){ PerfTelemetry::instance().recordFrameAge(PerfTelemetry::FrameKind::Panadapter, v); }},
        {"udpDrain stall (8.0 ms)", 7.5, 8.5, QStringLiteral("udpDrain"),
            [](double v){ PerfTelemetry::instance().recordUdpBatch(1, 100, v); }},
        {"input stall (16.0 ms)", 15.0, 17.0, QStringLiteral("input"),
            [](double v){ PerfTelemetry::instance().recordInputEvent("wheel", v); }},
    };

    qint64 t = 100'000'000'000LL;
    for (const auto& c : cases) {
        // Below threshold: no stall of this kind.
        prime(t);
        c.trigger(c.justUnder);
        bool sawBelow = false;
        for (const auto& line : stallLines())
            if (fieldValue(line, QStringLiteral("kind")) == c.expectedStallKind)
                sawBelow = true;
        report((std::string(c.name) + " below threshold: no stall").c_str(), !sawBelow);

        // Above threshold: stall fires.
        t += 5'000'000'000LL;
        prime(t);
        c.trigger(c.justOver);
        bool sawAbove = false;
        for (const auto& line : stallLines())
            if (fieldValue(line, QStringLiteral("kind")) == c.expectedStallKind)
                sawAbove = true;
        report((std::string(c.name) + " above threshold: stall fires").c_str(), sawAbove);

        t += 5'000'000'000LL;
    }
}

// --- Drag-aware UI lag thresholds -------------------------------------------
//