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'RDD Process' consuming 100%+ CPU

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  'RDD Process' consuming 100%+ CPU Richmond <dnomhcir@gmx.com> - 2025-08-08 12:06 +0100
    Re: 'RDD Process' consuming 100%+ CPU Andy Burns <usenet@andyburns.uk> - 2025-08-08 12:25 +0100
    Re: 'RDD Process' consuming 100%+ CPU VanguardLH <V@nguard.LH> - 2025-08-08 09:49 -0500
      Re: 'RDD Process' consuming 100%+ CPU Richmond <dnomhcir@gmx.com> - 2025-08-08 16:07 +0100
    Re: 'RDD Process' consuming 100%+ CPU YouTube <yt@invalid.invalid> - 2025-08-08 22:04 +0000

#14412 — 'RDD Process' consuming 100%+ CPU

When I visit this site:

https://openai.com/gpt-5/

a video starts playing, and the process 'RDD Process' appears in 'top'
(linux command line) and the usage goes up from 90% to over 100%. Also,
when I click the try gpt-5, it does not launch gpt-5, but instead stays
on 4. I don't see these problems with Brave.

According to Chat-gpt this process is a sandbox video playing
process. But when I pause the video it still uses over 100% cpu.

I set media.autoplay.blocking_policy = 2 but the video still plays
without asking.

The only way I know to check which version of chat-gpt is in use is to
ask it. Version 5 confirms itself.

Debian GNU/Linux 12
Debian 6.1.140-1 (2025-05-22) x86_64 GNU/Linux
Mozilla Firefox 128.13.0esr

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#14413

Richmond wrote:

> video starts playing, and the process 'RDD Process' appears
Remote Data Decoder, keeps the video codec sandboxed from the main 
firefox process.

<https://wiki.mozilla.org/Security/Sandbox/Process_model#Remote_Data_Decoder_(RDD)>

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#14418

Richmond <dnomhcir@gmx.com> wrote:

> When I visit this site:
> 
> https://openai.com/gpt-5/
> 
> a video starts playing, and the process 'RDD Process' appears in 'top'
> (linux command line) and the usage goes up from 90% to over 100%. Also,
> when I click the try gpt-5, it does not launch gpt-5, but instead stays
> on 4. I don't see these problems with Brave.
> 
> According to Chat-gpt this process is a sandbox video playing
> process. But when I pause the video it still uses over 100% cpu.
> 
> I set media.autoplay.blocking_policy = 2 but the video still plays
> without asking.
> 
> The only way I know to check which version of chat-gpt is in use is to
> ask it. Version 5 confirms itself.
> 
> Debian GNU/Linux 12
> Debian 6.1.140-1 (2025-05-22) x86_64 GNU/Linux
> Mozilla Firefox 128.13.0esr

From a search on "rdd process", I found:

https://askubuntu.com/questions/1483112/high-cpu-usage-by-a-firefox-subprocess-called-rdd-process

Go into about:config and set media.rdd = false.  Without the media
getting funneled through the sandboxed RDD process, if the video process
crashes then so does the web browser.

https://www.reddit.com/r/linux/comments/xcikym/tutorial_how_to_enable_hardware_video/

That mentions VA-API, and checking if hardware (GPU) acceleration is
enabled in about:config, but also mentions nVidia GPU's don't have
VA-API.  You didn't mention your video card.  RDD uses the GPU for
hardware acceleration.

https://en.wikipedia.org/wiki/Video_Acceleration_API

RDD uses the GPU for hardware acceleration.  I found an article that
mentions how to ensure it is enabled in FF at:

https://discourse.ubuntu.com/t/enabling-accelerated-video-decoding-in-firefox-on-ubuntu-21-04/22081

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#14420

VanguardLH <V@nguard.LH> writes:

> Richmond <dnomhcir@gmx.com> wrote:
>
>> When I visit this site:
>> 
>> https://openai.com/gpt-5/
>> 
>> a video starts playing, and the process 'RDD Process' appears in 'top'
>> (linux command line) and the usage goes up from 90% to over 100%. Also,
>> when I click the try gpt-5, it does not launch gpt-5, but instead stays
>> on 4. I don't see these problems with Brave.
>> 
>> According to Chat-gpt this process is a sandbox video playing
>> process. But when I pause the video it still uses over 100% cpu.
>> 
>> I set media.autoplay.blocking_policy = 2 but the video still plays
>> without asking.
>> 
>> The only way I know to check which version of chat-gpt is in use is to
>> ask it. Version 5 confirms itself.
>> 
>> Debian GNU/Linux 12
>> Debian 6.1.140-1 (2025-05-22) x86_64 GNU/Linux
>> Mozilla Firefox 128.13.0esr
>
> From a search on "rdd process", I found:
>
> https://askubuntu.com/questions/1483112/high-cpu-usage-by-a-firefox-subprocess-called-rdd-process
>
> Go into about:config and set media.rdd = false.  Without the media
> getting funneled through the sandboxed RDD process, if the video process
> crashes then so does the web browser.
>
> https://www.reddit.com/r/linux/comments/xcikym/tutorial_how_to_enable_hardware_video/
>
> That mentions VA-API, and checking if hardware (GPU) acceleration is
> enabled in about:config, but also mentions nVidia GPU's don't have
> VA-API.  You didn't mention your video card.  RDD uses the GPU for
> hardware acceleration.
>
> https://en.wikipedia.org/wiki/Video_Acceleration_API
>
> RDD uses the GPU for hardware acceleration.  I found an article that
> mentions how to ensure it is enabled in FF at:
>
> https://discourse.ubuntu.com/t/enabling-accelerated-video-decoding-in-firefox-on-ubuntu-21-04/22081

Thanks, that (about:config webrender) has reduced the processing. What's
puzzling though is in Firefox settings it has:

[x] Use recommended performance settings
Learn more
These settings are tailored to your computer’s hardware and operating system.

And when I uncheck the box, it shows hardware acceleration enabled. So I
wonder if it is enabled when I don't uncheck the box, a bit like
wondering if the light is on in the fridge when the door is shut.

My GPU is:

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT
Integrated Graphics Controller (rev 0b)

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#14435

On 08/08/2025 12:06, Richmond wrote:
> When I visit this site:
> 
> https://openai.com/gpt-5/
> 
> 

Did you try watching the video on YouTube?

<https://www.youtube.com/live/0Uu_VJeVVfo>

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