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[Question]: What is the purpose of the NOP WQE in nccl gin

question

Status: Open.

#2152 In NVIDIA/nccl;

· shenhongqian opened on Apr 30, 2026

[Question]: Is there any way to avoid creating unnecessary full-mesh RMA Proxy QPs when RMA APIs are never used?

question

Status: Open.

#2149 In NVIDIA/nccl;

· YeSho-cpp opened on Apr 29, 2026

[Issue]: NVLS: Bandwidth utilization appears to drop vs theoretical NVLink bandwidth.

Status: Open.

#2140 In NVIDIA/nccl;

· shenyt-sanshui opened on Apr 28, 2026

[Question]:Regarding the issue of measurement results provided by the Inspector plugin

question

Status: Open.

#2139 In NVIDIA/nccl;

· zhangjunjie64 opened on Apr 28, 2026

[Issue]: ginTrafficClass in ncclDevCommCreate requirements not taking effect

Status: Open.

#2138 In NVIDIA/nccl;

· huakainomore opened on Apr 28, 2026

[Issue]: ginConnectionType in ncclDevCommCreate requirements not taking effect

Status: Open.

#2137 In NVIDIA/nccl;

· huakainomore opened on Apr 27, 2026

[Issue]: NCCL batch_isend_irecv hangs on receiver with asymmetric batched P2P ops

Status: Open.

#2130 In NVIDIA/nccl;

· Gvilenius opened on Apr 23, 2026

[RFC] nccl-ep: explicit arguments instead of (inputs, num_inputs)

Status: Open.

#2122 In NVIDIA/nccl;

· kwen2501 opened on Apr 20, 2026

[Issue]: putSignal has a bug that causes vllm/sglang requests to be lost.

Status: Open.

#2119 In NVIDIA/nccl;

· leoda1 opened on Apr 20, 2026

[Question]: Question about Ring AllReduce concurrent flow interference

question

Status: Open.

#2118 In NVIDIA/nccl;

· LawsonLi opened on Apr 20, 2026

[Issue]: ncclNvlsDeregBuffer silently swallows cuMulticastUnbind failures — poisons CUDA context across ncclCommDestroy, breaks cuda-checkpoint

Status: Open.

#2117 In NVIDIA/nccl;

· shubh3794 opened on Apr 20, 2026

[Issue]: NCCL v2.30.3 segfault with profiler plugin enableled

Status: Open.

#2112 In NVIDIA/nccl;

· LeviMee opened on Apr 17, 2026