DBRX Model Support (#1462)

* wip for dbrx finetuning

* add fastcore for parallel loading of sharded weights

* fix dtype for load, use PartialState instead of accelerator to init process group, remove redundant wandb callback

* update to use v2 of the converted model

* more fixes for dbrx loras

* make sure to enable fsdp activation checkpointing

* fix support for 8bit loras too for dbrx

* apply z3 leaf moe fix for DBRX with deepspeed

* don't raise value error since child module searches could fail and be ok

* revert a previous change to fix fsdp

* update mistral/mistral qlora+fsdp yamls

* fix qlora+fsdp quant storage type

* more edge cases for qlora-fsdp

* fixes for fsdp+qlora w optimizer in 8bit

* add bigstral z3 config and make sure to use full_state_dict for fsdp

examples/llama-2/qlora-fsdp.yml

@@ -65,12 +65,14 @@ deepspeed:
 weight_decay: 0.0
 fsdp:
   - full_shard
+  - auto_wrap
 fsdp_config:
   fsdp_limit_all_gathers: true
   fsdp_sync_module_states: true
   fsdp_offload_params: true
   fsdp_use_orig_params: false
   fsdp_cpu_ram_efficient_loading: true
+  fsdp_auto_wrap_policy: TRANSFORMER_BASED_WRAP
   fsdp_transformer_layer_cls_to_wrap: LlamaDecoderLayer
-  fsdp_state_dict_type: SHARDED_STATE_DICT
+  fsdp_state_dict_type: FULL_STATE_DICT
 special_tokens: