DPC latency and audio stutters with high bittorrent traffic using Intel AX210.

[Alawami]

When downloading using bittorrent for more than few seconds at a speed of around 80MiB/s audio stutters happens and several massive DPC latency spike as observed by LatencyMon.

-DPC and interrupt to process latency spikes only happens with inbound BitTorrent traffic around 750mbps.

-NEVER happens when stressing with iperf3 or speedtest.net with 800mbps traffic, though using 80 parallel iperf3 connections slightly increases the DPC latency but no significant spikes like with BitTorrent traffic.

-The spikes can be as small as 4ms or as big as 28ms.
-Latencymon attributes the spikes to ndis.sys and tcpip.sys.

Steps to reproduce

1. On high speed internet on my PC (Windows 11 22H2, Intel AX210 driver 22.250.1.2)
2. Download something that can get you >80MiB/S using bittorrent.
3. Observe DPC/ISR latency with latencymon
4. [optional] Play any audio or pure tone to observe potential audio stutters.

[IsaacQ_Intel]

Hello Alawami

Thank you for posting on the Intel communities and opening a new thread.

We understand you have also opened a web portal support case with us, so, in this case, will continue to help you through that channel now. We will therefore close this community case. Please, keep in mind that this thread will no longer be monitored by Intel, in case that you have further questions, please open a new thread.

Thanks for your understanding.

Best regards,

Isaac Q.

Intel Customer Support Technician