00000000 nccl4:1390395:1390435 [0] NCCL INFO NCCL_IGNORE_DISABLED_P2P set by environment to 1. ...
NCCL_CHECK_POINTERS 在每次集合通信进行前对CUDA内存 指针进行校验,这会增加延迟时间,在生产环境中可以设为1.缺省是0 NCCL_NET_GDR_LEVEL GDR触发的条件,默认是当GPU和NIC挂载一个swith上面时使用GDR NCCL_IGNORE_CPU_AFFINITY 忽略CPU与应用的亲和性使用GPU与nic的亲和性为主 NCCL_ALGO 通信使用的算法,ring Tree...
mpirun -np2-pernode\-hostfile hostfile\-mca btl_tcp_if_include eno2\-xNCCL_SOCKET_IFNAME=eno2\-xNCCL_DEBUG=INFO\-xNCCL_IGNORE_DISABLED_P2P=1\-xCUDA_VISIBLE_DEVICES=0,1\./build/all_reduce_perf -b8-e 128M -f2-g2-c0 执行结果: nThread1nGpus2minBytes8maxBytes134217728step: 2(factor...
Vulnerability Spec rstack overflow: Mitigation; safe RET Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization Vulnerability Spectre v2: Mitigation; Retpolines; IBP...
Your current environment vllm 0.4.0.post1 docker image how ran: docker run -d \ --runtime=nvidia \ --gpus '"device=0,1"' \ --shm-size=10.24gb \ -p 5002:5002 \ -e NCCL_IGNORE_DISABLED_P2P=1 \ -v /etc/passwd:/etc/passwd:ro \ -v /etc/group:...
== PCI) && remPath->count > 3) type = PATH_PXB; // Consider a path going through the CPU as PATH_PHB if (link->type == LINK_PCI && (node->type == CPU || link->remNode->type == CPU)) type = PATH_PHB; // Ignore Power CPU in an NVLink path if (path->...
然后通过ncclTopoCheckP2p检查当前GPU节点和其他所有的GPU节点之间是否可以使用p2p通信,其实就是判断gpu1到gpu2的路径type是否满足p2pLevel的限制,默认p2pLevel是PATH_SYS,如果用户没有通过环境变量设置的话就相当于没有限制,任意gpu之间都是支持p2p通信,另外如果路径类型为PATH_NVL的话,那么还支持p2p read。 ncclResult...
TheNCCL_IGNORE_CPU_AFFINITYvariable can be used to cause NCCL to ignore the job’s supplied CPU affinity and instead use the GPU affinity only. Values accepted¶ The default is 0, set to 1 to cause NCCL to ignore the job’s supplied CPU affinity. ...
一个简单的方法,使用NCCL作为分布式训练的通信后端时,先在终端导入环境变量exportNCCL_DEBUG=INFOexportNCCL_IGNORE_DISABLED_P2P=1再启动分… 阅读全文 赞同 56 条评论 分享 收藏喜欢 NCCL通信C++示例(四): AlltoAll_Split实现与分析 ...
Note: This adds a new level (5) for the NCCL_P2P_LEVEL and NCCL_NET_GDR_LEVEL environment variables. See the NCCL documentation for more details. ‣ Added the NCCL_IGNORE_CPU_AFFINITY environment variable. Compatibility NCCL 2.4.7 has been tested with the following: ‣ Deep learning ...