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NCCL Roadmap: Aug - Oct 2026

roadmap

Status: Open.

#2272 In NVIDIA/nccl;

· gab9talavera opened on Jul 6, 2026

[Question]: Does NCCL GIN (GDAKI backend) support ConnectX-6 NICs?

question

Status: Open.

#2255 In NVIDIA/nccl;

· Ben286 opened on Jun 26, 2026

[Question]: How does the CuTeDSL device API legally dereference the host-side ncclDevComm on the device?

question

Status: Open.

#2246 In NVIDIA/nccl;

· UESTC-zjh opened on Jun 24, 2026

[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

[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