Search results

[Issue]: NCCL will not find next team

Status: Open.

#2016 In NVIDIA/nccl;

· Qizhi697 opened on Feb 5, 2026

[Question]: NCCL Symmetric Memory: ncclSymkMask Logic Issue

question

Status: Open.

#2014 In NVIDIA/nccl;

· sonsyfei opened on Feb 5, 2026

[Issue]: RuntimeError: NCCL Error 2 & ibv_modify_qp timeout (errno 110) during Distributed Checkpoint saving on 8 nodes (RoCE v2)

Status: Open.

#2013 In NVIDIA/nccl;

· x632701882 opened on Feb 4, 2026

[Issue]: CE collectives fail if they are run on default cuda stream

Status: Open.

#2003 In NVIDIA/nccl;

· ngoyal2707 opened on Jan 27, 2026

[Issue]: nccl-tests fail with wrong transfers

Status: Open.

#2001 In NVIDIA/nccl;

· angainor opened on Jan 26, 2026

[Issue]: Deadlock/crash due to UAF in inspector plugin

Status: Open.

#2000 In NVIDIA/nccl;

· RicoloveFeng opened on Jan 26, 2026

[Issue]: Upgrading NCCL from 2.22 to 2.24/2.29 causes significant performance regression in collective operations due to increased local memory instructions (ldl/stl).

Status: Open.

#1997 In NVIDIA/nccl;

· Shengqi-Pan opened on Jan 23, 2026

[Issue]: Segmentation fault at RAS in NCCL 2.27.7

Status: Open.

#1996 In NVIDIA/nccl;

· mmhzheng opened on Jan 23, 2026

[Roadmap]: NCCL Roadmap Q1 2026

roadmap

Status: Open.

#1995 In NVIDIA/nccl;

· gab9talavera opened on Jan 23, 2026

[Question]: How does the number thread blocks affect GIN performance

question

Status: Open.

#1994 In NVIDIA/nccl;

· BDHU opened on Jan 22, 2026

[Question]: Why does GIN require both crossNicSupported and !globalNicFused conditions?

question

Status: Open.

#1993 In NVIDIA/nccl;

· yesho-top opened on Jan 22, 2026

[Question]: Inspector Bug: Do RecordEvents recall after StopEvent? This results in a 'segfault encountered' error

Status: Open.

#1992 In NVIDIA/nccl;

· adai995995 opened on Jan 22, 2026