[Feature] performance problem

[Xiang-cd]

Is your feature request related to a problem? Please describe.

非常赞赏学长们的工作！我有一个小小的问题注意到readme里有一个吞吐和显存占用的表格。BMtrain显著优于Deepspeed- megaton，我好奇这其中的优化主要来源于什么地方呢。同样的逻辑，为什么我们能够支持更多的bach size，吞吐更高？是否也有显卡配置的原因呢（sxm的机器是不是会因为高带宽抹去这样的差距）。
我觉得做到这样的优化绝对是系统顶会级别的工作，学长们有兴趣分析这其中的优化点并总结成文章投稿吗。
其实我非常希望使用BMtrain的框架，但是只看到其中的好，不知道为什么好，心里就不踏实。

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[Pegessi]

I believe this work is remarkable for the combination of memory and parallelism and is great for bringing higher throughput. However, insufficient part is that experiments about Megatron-Deepspeed as baseline in this paper do not use Megatron-DeepSpeed with PTD-P and memory optimization in Megatron-LM. Futhermore, Zero3 default config is inefficient because of cpu offloading enabled in few GPUs, which has been dicussed in some blogs.