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[GH-ISSUE #487] How to use CUmemFabricHandle? #315

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opened 2026-10-26 09:58:28 +00:00 by bsakaguchi · 2 comments
bsakaguchi commented 2026-10-26 09:58:28 +00:00
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Originally created by @kzlxd on GitHub (Nov 10, 2025).
Original GitHub issue: https://github.com/deepseek-ai/DeepEP/issues/487

CU_CHECK(cuMemCreate(&handle, size, &fabric_prop_, 0));报错call='cuMemCreate(&handle, size, &fabric_prop_, 0)' Reason=operation not permitted.
I encountered this error when testing the hybrid EP on the B200. How should I resolve it?

Originally created by @kzlxd on GitHub (Nov 10, 2025). Original GitHub issue: https://github.com/deepseek-ai/DeepEP/issues/487 CU_CHECK(cuMemCreate(&handle, size, &fabric_prop_, 0));报错call='cuMemCreate(&handle, size, &fabric_prop_, 0)' Reason=operation not permitted. I encountered this error when testing the hybrid EP on the B200. How should I resolve it?
bsakaguchi commented 2026-10-26 09:58:29 +00:00
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@Autumn1998 commented on GitHub (Jan 30, 2026):

CUmemFabricHandle is only supported on the NVL72. please use the inter-node API for the hybrid-ep

<!-- gh-comment-id:3822612587 --> @Autumn1998 commented on GitHub (Jan 30, 2026): CUmemFabricHandle is only supported on the NVL72. please use the inter-node API for the hybrid-ep
bsakaguchi commented 2026-10-26 09:58:29 +00:00
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@101nobody commented on GitHub (Mar 16, 2026):

FYI: https://forums.developer.nvidia.com/t/cudevicegetattribute-shows-i-can-use-fabric-handle-but-actually-i-cannot/336426

<!-- gh-comment-id:4068681876 --> @101nobody commented on GitHub (Mar 16, 2026): FYI: https://forums.developer.nvidia.com/t/cudevicegetattribute-shows-i-can-use-fabric-handle-but-actually-i-cannot/336426
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