post_send(qp, wr, bad_wr) -> ibv_post_send main: 主函数 net_type: 网络类型 ncclNet_t* ncclNets[3] = { nullptr, &ncclNetIb, &ncclNetSocket }; src/transport/net_ib.cc IB网卡实现的接口API ncclNet_t ncclNetIb = { "IB", ncclIbInit, ncclIbDevices, ncclIbGetProperties, ncclIb...
gpu02:35637:35725 [0] transport/net_socket.cc:503 NCCL WARN NET/Socket : peer 10.10.10.2<54150> message truncated : receiving 16777216 bytes instead of 524288. If you believe your socket network is in healthy state, there may be a mismatch in collective sizes or environment settings (e.g....
lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 192 On-line CPU(s) list: 0-191 Thread(s) per core: 2 Core(s) per socket: 48 Socket(s): 2 NUMA node(s): 2 Vendor ID: AuthenticAMD CPU family: 25 Model: 17 Model name: AMD EPY...
TheNCCL_SOCKET_RETRY_SLEEP_MSECvariable specifies the number of milliseconds NCCL waits before retrying to establish a socket connection after the firstETIMEDOUT,ECONNREFUSED, orEHOSTUNREACHerror. For subsequent errors, the waiting time scales linearly with the error count. The total time will therefore...
2、所有rank根据rank0的网络地址,建立socket并向rank0发送自己的网络地址,rank0上现在就有所有rank的网络地址了; 3、rank0告诉每个rank它的下一个节点网络地址,完成环形网络建立; 4、AllGather全局收集所有节点的网络地址; 注:ncclUniqueId就是前面课程所说的,在rank0上产生,并MPI广播给所有rank,UniqueId由两部分...
It can be worked around by setting the following parameter: NCCL_MIN_NCHANNELS=4 Fixed Issues The following issues have been resolved in NCCL 2.16.5: ‣ Fix speed of IB NDR links ‣ Fix handling of EINTR in socket polling ‣ Improve proxy progress scheduling ‣ Fix resource cleanup ...
[7] NCCL INFO NET/Socket : GPU Direct RDMA Disabled for HCA 6 'enp135s0f0' nathan-h100-1:11902:11975 [7] NCCL INFO NET/Socket : GPU Direct RDMA Disabled for HCA 7 'enp141s0f0' nathan-h100-1:11902:11975 [7] NCCL INFO KV Convert to int : could not find value of '' in ...
1]; WARN("socketProgress: Connection closed by remote peer %s", ncclSocketToString&sock->addr line, 0)); return ncclRemoteError } return ncclSuccess; } static ncclResult_t socketWait(int op, struct ncclSocket* sock, void* ptr
NCCL_SOCKET_RETRY_CNT¶ (since 2.24) TheNCCL_SOCKET_RETRY_CNTvariable specifies the number of times NCCL retries to establish a socket connection after anETIMEDOUT,ECONNREFUSED, orEHOSTUNREACHerror. Values accepted¶ The default value is 34, any positive value is valid. ...
It can be worked around by setting the following parameter: NCCL_MIN_NCHANNELS=4 Fixed Issues The following issues have been resolved in NCCL 2.16.5: ‣ Fix speed of IB NDR links ‣ Fix handling of EINTR in socket polling ‣ Improve proxy progress scheduling ‣ Fix resource cleanup ...