[BUG] WebRTC unity interfere's with native CUDA plugins

[nithins]

Hi,

I have an existing plugin that executes CUDA kernels on a separate thread. When the WebRTC plugin is installed in Unity, the existing CUDA library which worked perfectly fine (on the separate thread), starts to cause Illegal memory access issues. This happens every-time we issue any device read calls from another thread. This seems to work fine if all CUDA memory accesses are done on Unity's UI thread.

Any idea what may be happening behind the scenes? Note that I do not even use the library yet. I simply install the plugin.

[karasusan]

@nithins
Thanks for your feedback.
May I have the small project for reproducing the issue? Thanks.

[nithins]

@karasusan Thanks for the quick revert . I'll post a Minimum working sample demonstrating the issue. Meanwhile, I have made a few fixes for a linux version which does not depend on CUDA for my purposes which is available at https://github.com/nithins/com.unity.webrtc/tree/fix/linux_nocuda .

[karasusan]

@nithins
Is this issue reproduced on windows? or only Linux?

[nithins]

Hi Kazuki, I have observed it only on Linux. I don't have access to a windows machine to test. I'm preparing a minimum sample to demonstrate the issue. Will revert by tomorrow. Get Outlook for Android<https://aka.ms/ghei36>

…

________________________________ From: Kazuki Matsumoto ***@***.***> Sent: Thursday, October 28, 2021 8:56:45 AM To: Unity-Technologies/com.unity.webrtc ***@***.***> Cc: NithinS ***@***.***>; Mention ***@***.***> Subject: Re: [Unity-Technologies/com.unity.webrtc] [BUG] WebRTC unity interfere's with native CUDA plugins (Issue #549) @nithins<https://github.com/nithins> Is this issue reproduced on windows? or only Linux? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#549 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AABQ2SSVXRJIFR5NVD2ANGTUJC7HLANCNFSM5GXB7EUQ>. Triage notifications on the go with GitHub Mobile for iOS<https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android<https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.

[karasusan]

@nithins
Hi, Ca we have your sample? thanks.

[nithins]

Hi @karasusan , I'm having trouble setting up a sample project that loads a C++/C plugin into unity, with the C/C++ being built by cmake. Do you have a minimum sample somewhere I could use? I use Swig to generate the wrapper code, unfortunately I'm unable to replicate the setup. Sorry for the inconvenience, but the base plugin that I am using is closed source.

[karasusan]

@nithins
OK, you mean, to reproduce your issue, we need to make the native plugin that executes CUDA kernels.
We will try that, but I cannot promise when we fix this issue.

[karasusan]

memo: WRS-193