NCCL INFO NET/IB : Using [0]mlx5_0:1/RoCE [1]mlx5_1:1/RoCE [2]mlx5_2:1/RoCE... NCCL INFO Using network IB 解释:使用了IB网络,并且使用的设备是:[0]mlx5_0:1/RoCE [1]mlx5_1:1/RoCE 等。每个机器都会打印一个这样的日志。 NCCL INFO ncclCommInitRank comm 0x7f026c611c30 rank 5...
NCCL INFO NVLS multicast support is not available on dev 2 NVLS(NVIDIA Virtual Link Subsystem)多播支持在该设备上不可用。这可能是因为硬件不支持或者驱动程序配置不正确。 NCCL INFO Using network IBext 这表明NCCL正在通过InfiniBand扩展(IBext)进行通信,这是一种高速网络技术,常用于数据中心和高性能计算集群...
node155:3052670:3052714 [2] NCCL INFO NET/IB : Using [0]mlx5_bond_0:1/RoCE [RO]; OOB bond0:10.218.201.155<0> node155:3052670:3052714 [2] NCCL INFO Using non-device net plugin version 0 node155:3052670:3052714 [2] NCCL INFO Using network IB node155:3052668:3052715 [0] NCCL INFO...
resnet-p-worker-0:195626:195626 [0] NCCL INFO P2P plugin IBext resnet-p-worker-0:195626:195626 [0] NCCL INFO NET/IB : Using [0]mlx5_6:1/RoCE [1]mlx5_7:1/RoCE [2]mlx5_9:1/RoCE [3]mlx5_10:1/RoCE [4]mlx5_12:1/RoCE [5]mlx5_13:1/RoCE [6]mlx5_17:1/RoCE [7]m...
INFO(NCCL_INIT|NCCL_NET,"NET/IB : Using%s ; OOB %s:%s", line, ncclIbIfName, socketToString(&ncclIbIfAddr.sa, addrline)); } pthread_mutex_unlock(&ncclIbLock); }returnncclSuccess; } AI代码助手复制代码 首先第三行通过wrap_ibv_symbols加载动态库libibverbs.so,然后获取动态库的各个函数。
The NCCL_IB_TIMEOUT variable controls the InfiniBand Verbs Timeout. For more information, see InfiniBand. The default value used by NCCL is 14. Values can be 1-22. The timeout is computed as 4.096 µs * 2 ^ timeout, and the right value is dependent on the size of the network. ...
"IB" : "RoCE"); } line[1023] = '\0'; char addrline[1024]; INFO(NCCL_INIT|NCCL_NET, "NET/IB : Using%s ; OOB %s:%s", line, ncclIbIfName, socketToString(&ncclIbIfAddr.sa, addrline)); } pthread_mutex_unlock(&ncclIbLock); } return ncclSuccess;}首先第三...
‣ NCCL optimizes intra-node communication using NVLink, PCI express, and shared memory. ‣ Between nodes, NCCL implements fast transfers over sockets or InfiniBand verbs. ‣ GPU-to-GPU and GPU-to-Network direct transfers, using the GPU Direct technology, are extensively used when the ...
作者|KIDGINBROOK更新|潘丽晨NCCL是英伟达开源的GPU通信库,支持集合通信和点对点通信。看下官方给的一个demo: {代码...} 在上边的示例中,rank0会执行ncc...
ah_attr.dlid = info->lid; } qpAttr.ah_attr.sl = ncclParamIbSl(); qpAttr.ah_attr.src_path_bits = 0; qpAttr.ah_attr.port_num = info->ib_port; NCCLCHECK(wrap_ibv_modify_qp(qp, &qpAttr, IBV_QP_STATE | IBV_QP_AV | IBV_QP_PATH_MTU | IBV_QP_DEST_QPN | IBV_QP_RQ_PSN...