topic Re: AP122 high CPU usage when streaming. in Aerohive Migrated Content

AP122 high CPU usage when streaming.

sergi_dupe — Wed, 20 Nov 2019 17:17:15 GMT

Hi,

I have an AP122.

When I stream a 4kUHD movie (Plex server detects that the movie is encoded at 139Mbps) to my TV (the TV is connected at 5GHz band and 1% rx CRC rate according to tech log), the movie has to buffer all the time. Diggin deeper in the issue, it turns out that the AP122 CPU is about 98% when streaming that movie.

This is the log message: 2019-11-19 20:24:36 warn ah_top: CPU rate overload.

The process that uses the 98% of CPU resources is :

3 root RW [ksoftirqd/0]

My question is: is AP122 capable of dealing with that with a proper configuration (this is, reduce the ksoftirqd/0 demands) ? or I have reached a hardware limitation ?

Thank you!

Re: AP122 high CPU usage when streaming.

samantha_lynn — Wed, 20 Nov 2019 23:47:34 GMT

Is this the only traffic on the AP at the time? If not, approximately how many other users are on the AP at the same time, and do you know if they are also trying to stream?

Re: AP122 high CPU usage when streaming.

sergi_dupe — Wed, 20 Nov 2019 23:50:24 GMT

There was about 5 to 7 users but not active ones (not streaming nor web-browsing), so yes, that was the only significant traffic.

Re: AP122 high CPU usage when streaming.

sergi_dupe — Tue, 26 Nov 2019 23:51:57 GMT

Any news on that?

Thanks!

Re: AP122 high CPU usage when streaming.

samantha_lynn — Tue, 26 Nov 2019 23:54:45 GMT

Sorry for the long wait here, thank you for checking in. Would you be able to get tech data from the AP taken when you're streaming and having issues? Also, could you let me know the MAC address of the device you're using when you pull the tech data? If you'd like to send that to me directly, my email is communityhelp@aerohive.com.

Re: AP122 high CPU usage when streaming.

dorothyjamez — Tue, 22 Oct 2024 09:39:08 GMT

Hello ExtremeNetworks Community,

It seems like your AP122 is struggling with the high CPU usage, especially when streaming a 4K UHD movie at such a high bitrate (139Mbps). The AP122's CPU spikes to 98% during streaming, which could be due to insufficient processing power to handle the data throughput, especially over a wireless 5GHz connection. You might want to consider upgrading your access point to a more powerful model or reducing the stream bitrate if possible. On a related note, if you're using want how to change the language on magis tv, you can typically find this option in the settings menu under "Language Preferences."

Best of Luck!!

Re: AP122 high CPU usage when streaming.

stella98 — Mon, 16 Dec 2024 08:23:34 GMT

Hi Sergi,

It sounds like your AP122 might be hitting a hardware limitation. The high CPU usage, especially with the ksoftirqd/0 process, suggests that the access point is struggling to process the network interrupts efficiently while handling such a high bitrate (139Mbps). Unfortunately, the AP122 may not be optimized for streaming 4K UHD content at this level, particularly over wireless.

Here are a few suggestions that might help:

Optimize Bitrate: If possible, reduce the bitrate of your stream on the Plex server. This can help decrease the load on the AP122.
Ethernet Connection: If your TV supports a wired connection, switching to Ethernet can alleviate the wireless demand on the AP.
Upgrade Access Point: Consider upgrading to a more robust AP designed for high-bandwidth streaming, such as those with better CPU and memory capabilities.

As an alternative, you might also explore IPTV services that are designed for seamless streaming across various devices. For instance, MagisTV Premium offers a user-friendly platform with optimized streaming quality. It could be a great solution for enjoying 4K content without the buffering issues you're currently experiencing.

Re: AP122 high CPU usage when streaming.

MagisTV — Sun, 12 Jan 2025 12:13:49 GMT

Hello ExtremeNetworks Community,

Your AP122 struggles with high CPU usage (98%) when streaming 4K at 139 Mbps, likely due to limited processing power. Consider upgrading your access point or lowering the stream quality.

To change the language on MagisTV, go to the settings menu and select Language Preferences.

Best regards,

Re: AP122 high CPU usage when streaming.

Jessicasmiths — Mon, 27 Jan 2025 08:06:09 GMT

Hello ExtremeNetworks Community,

The AP122 experiences high CPU usage (98%) while streaming 4K content at 139 Mbps, likely due to its processing limitations. Upgrading to a more powerful access point or reducing the stream quality could help resolve this issue.

To change the language on MagisTV, navigate to the settings menu and select "Language Preferences."

Best regards,

Re: AP122 high CPU usage when streaming.

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Re: AP122 high CPU usage when streaming.

eazagaaz — Sun, 27 Apr 2025 20:23:26 GMT

It sounds like your AP122 might be hitting a hardware limitation. The high CPU usage, especially with the ksoftirqd/0 process, suggests that the access point is struggling to process network interrupts efficiently while handling such a high bitrate (139 Mbps). Unfortunately, the AP122 may not be optimized for streaming 4K UHD content at this level, particularly over wireless.

Here are a few suggestions that might help:

Optimize Bitrate: If possible, lower the stream bitrate on your Plex server to reduce the load on the AP122.
Use Ethernet: If your TV supports it, a wired Ethernet connection can significantly ease the wireless load.
Upgrade Your Access Point: Consider investing in a higher-end access point designed for heavy streaming with stronger CPU and memory resources.

As an alternative, you might also explore IPTV services optimized for seamless streaming across multiple devices. For example, MagisTV Premium offers a user-friendly platform with high-quality 4K streaming. You can check it out at — it could be a solid solution for enjoying UHD content without the buffering issues you're currently facing.

Re: AP122 high CPU usage when streaming.

eazagaaz — Sun, 27 Apr 2025 20:26:09 GMT

Hello ExtremeNetworks Community,

To change the language on MagisTV, navigate to the settings menu and select "Language Preferences."

Re: AP122 high CPU usage when streaming.

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Re: AP122 high CPU usage when streaming.

Victor31 — Thu, 15 May 2025 07:40:36 GMT

The high CPU usage on your AP122 during 4K UHD streaming is mainly caused by the ksoftirqd/0 process, which handles software interrupts (softirqs) in the Linux kernel. When you stream a high-bitrate video like one encoded at 139 Mbps it generates a large amount of network traffic, which increases the softirq load and pushes the AP’s CPU usage close to 98%. Since the AP122 is an entry-level access point, it may not have enough processing power to handle such heavy traffic efficiently, leading to performance issues like buffering.

To address this, you can take a few steps. First, try to limit multicast and broadcast traffic on your network, as too much of it can overwhelm the access point. Configuring your switches to control this type of traffic can help. Second, consider segmenting your network especially the management subnet to reduce unnecessary communication and lighten the load on the AP. Finally, if streaming high-resolution video on hdo box is a frequent requirement in your setup, upgrading to a higher-performance access point that’s better equipped for high-throughput demands might be necessary.

Re: AP122 high CPU usage when streaming.

Shepherd — Thu, 22 May 2025 10:39:50 GMT

The high CPU usage on your AP122 during 4K UHD streaming is caused by the ksoftirqd/0 process, which handles deferred kernel tasks like managing heavy network traffic. When streaming high-bitrate video, such as a 139 Mbps 4K movie, this process can consume nearly all of the AP’s CPU resources, leading to buffering and performance issues. This indicates the AP122 is hitting its hardware limits, as it's designed for moderate bandwidth environments and may not be able to sustain such high-throughput demands. To mitigate the issue, you can reduce multicast and broadcast traffic, segment the network to spread the load across multiple APs, or upgrade to a more powerful access point designed for high-bandwidth hdo applications. These steps can help improve network stability and reduce buffering during intense streaming sessions.

Re: AP122 high CPU usage when streaming.

lloydherron — Mon, 30 Jun 2025 10:44:44 GMT

Hello Community Forums,

When streaming a high-bitrate 4K UHD movie (139Mbps) through a Plex server, many users experience constant buffering—even with a solid 5GHz connection and low CRC errors. Upon investigation, the AP122 access point’s CPU usage spikes to 98%, suggesting it's struggling to handle the load efficiently. This hardware bottleneck can severely impact your streaming experience. For a smoother, more reliable performance without overloading your network gear, consider switching to a lightweight, optimized platform like NetMirror Web—a free streaming app designed for seamless playback on various devices.

Visit their website and give it a try!

Re: AP122 high CPU usage when streaming.

Denny492 — Sat, 31 Jan 2026 08:37:00 GMT

High CPU usage on an AP122 during streaming is commonly caused by heavy traffic load, Delta script advanced features running simultaneously, or firmware limitations. Real-time streaming can significantly increase packet processing, especially if encryption, deep packet inspection, or QoS rules are enabled. To mitigate this, ensure the access point is running the latest stable firmware, review and disable unnecessary services, limit the number of concurrent clients, and verify that bandwidth-intensive streams are properly optimized or offloaded where possible. If high usage persists, it may indicate that the AP122 hardware is reaching its performance limits for sustained streaming workloads.