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8000Hz (8K) USB Polling Rate Architecture and CPU Interrupt Overhead: Edge Cases, Failure Modes, and Root-Cause Debugging

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  • October 26, 2026 at 7:17 am #126930
    User AvatarOwen Nelson
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    Running an 8000Hz setup on a Ryzen 7000 and I’m seeing DPC latency spike past 1500µs during burst traffic even with the mouse on a dedicated USB controller. At 8K you’re pushing 8000 interrupts/sec per device, so I’m trying to isolate whether the real bottleneck is xHCI’s transfer handling or

    "Lag isn’t an excuse, but it definitely wasn’t my fault."
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