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Issues list

NCCL internal error for ncclCommInitRank when using infiniband
#1591 opened Jan 29, 2025 by SzymonOzog
2
SendRecv only support Simple protocol?
#1590 opened Jan 27, 2025 by MARD1NO
Error while attaching to shared memory segment
#1589 opened Jan 25, 2025 by cassanof
1
In the scenario with two H20 nodes, each equipped with 16 GPU cards and 4 InfiniBand (IB) network cards per node, the bus bandwidth is only reaching 65Gbps.
#1588 opened Jan 24, 2025 by PaggyZhang
2
Potential buffer overflow issue in xml reader
#1585 opened Jan 21, 2025 by fishautumn
Getting NVLS user buffer registration to work under PyTorch
#1584 opened Jan 20, 2025 by lw
1
what does device network offload mean?
#1582 opened Jan 20, 2025 by kkndyu
NCCL Ignores Specified SOCKET_IFNAME Configuration on Worker Nodes in Multi-Node Setup
#1581 opened Jan 18, 2025 by rachid2198
5
NCCL_SOCKET_IFNAME has no effect during pytorch distributed training with multiple NICs
#1580 opened Jan 18, 2025 by hanruijiang
10
Question about post recv
#1577 opened Jan 17, 2025 by lpoyster
BusBW of 2-node tree-based Allreduce exceeds the theoretical limit
#1576 opened Jan 16, 2025 by JK-Jiagn
[Q] How to build nvidia-nccl whl package?
#1575 opened Jan 15, 2025 by kehuanfeng
nccl connection abort(between kubernetes pods): WARN NET/IB: read failed in ncclIbRoceGetVersionNum: Invalid argument
#1573 opened Jan 10, 2025 by limu713
8
nccl_max_nchannels dynamically set in the program
#1572 opened Jan 9, 2025 by Rainlin007
2
net.cc recvProxyConnect p2p buff set
#1570 opened Jan 9, 2025 by GeofferyGeng
Potential group\collective life-time management issue in profiler plugin.
#1569 opened Jan 9, 2025 by wiryls
2
How does the GPU that initiates the nvswitch broadcast know that the nvswitch has completed the broadcast operation?
#1568 opened Jan 8, 2025 by pengqianqian
Running issue with Nvidia NIM for NCCL.
#1567 opened Jan 7, 2025 by innat-asj
4
group launch allreduce + allgather
#1566 opened Jan 7, 2025 by alpha-baby
1
Comment of function
#1565 opened Jan 6, 2025 by WoosungMyung
1
[Hopper/NVLINK4] Origin of failure of fabric manager manifested through NCCL-based codes
#1562 opened Jan 3, 2025 by vitduck
3
AGX orin with nccl
#1561 opened Jan 3, 2025 by zuyulong
example profiler refCount issue
#1559 opened Dec 30, 2024 by fishautumn
1
Broadcast : recvbuff (nil) is not a valid pointerNCCL error
#1558 opened Dec 27, 2024 by mobilejammer
1
Is is possible for NCCL to add a retry mechanism when net flap happens
#1557 opened Dec 27, 2024 by ProHuper
ProTip! What’s not been updated in a month: updated:<2024-12-29.