ACCL: Architecting Highly Scalable Distributed Training Systems With Highly Efficient Collective Communication Library. - Jianbo Dong; Shaochuang Wang; Fei Feng; Zheng Cao; Heng Pan; Lingbo Tang; Pengcheng Li; Hao Li; Qianyuan Ran; Yiqun Guo; Shanyuan Gao; Xin Long; et al. (IEEE Micro, 2021)