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[Question]: ProxyOp and ProxyStep in NCCL Inspector

question

Status: Open.

#2239 In NVIDIA/nccl;

· ahmd-k opened on Jun 17, 2026

[Issue]: Performance and functional issues when using ncclPutSignal/ncclWaitSignal in Pipeline Parallelism

Status: Open.

#2238 In NVIDIA/nccl;

· DAMI211 opened on Jun 16, 2026

[Issue]: Add IB GRH support (IBV_QPF_GRH_REQUIRED) for GIN / GDAKI

Status: Open.

#2237 In NVIDIA/nccl;

· avnf opened on Jun 15, 2026

What RDMA verbs does NCCL GIN use?

Status: Open.

#2233 In NVIDIA/nccl;

· baiwei0427 opened on Jun 11, 2026

[Issue]: ncclCommInitAll() leaves a CUDA driver context on the stack

Status: Open.

#2231 In NVIDIA/nccl;

· Jacobfaib opened on Jun 10, 2026

[Question]: [GIN] GPI vs GDAKI: who selects the QP, and what NIC support does GPI need?

question

Status: Open.

#2226 In NVIDIA/nccl;

· QizhouZhang97 opened on Jun 9, 2026

[RFE]: Include qp_num in detailed RoCE completion error log

enhancement

Status: Open.

#2219 In NVIDIA/nccl;

· zrss opened on Jun 7, 2026

[Question]: Why NCCL allgather performance drop with D2H background traffic?

question

Status: Open.

#2218 In NVIDIA/nccl;

· ssb233 opened on Jun 6, 2026

[RFE]: Add opt-in auto-selection for IB NIC merge mode on two-node multi-HCA systems

Status: Open.

#2216 In NVIDIA/nccl;

· CyberSecurityErial opened on Jun 5, 2026

[Bug] SIGSEGV in ncclLocalOpAppend after ~1.1M collectives on CPU-path — dual DGX Spark (aarch64, GB10, NCCL 2.28.9+cuda13.0)

Status: Open.

#2213 In NVIDIA/nccl;

· parallelArchitect opened on Jun 4, 2026

[Question]: Potential ncclIntruQueueTransfer bug + memory leak?

question

Status: Open.

#2204 In NVIDIA/nccl;

· miEsMar opened on Jun 3, 2026

[Issue]: NCCL-GIN hang during the initial AllGather

Status: Open.

#2203 In NVIDIA/nccl;

· sheepx86 opened on Jun 3, 2026