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[kernel] support pure fp16 for cpu adam and update gemini optim tests (#4921)

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* [kernel] support pure fp16 for cpu adam (#4896)

* [kernel] fix cpu adam kernel for pure fp16 and update tests (#4919)

* [kernel] fix cpu adam

* [test] update gemini optim test
This commit is contained in:
Hongxin Liu
2023-10-16 21:56:53 +08:00
committed by GitHub
parent 7768afbad0
commit 4f68b3f10c
8 changed files with 148 additions and 136 deletions
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colossalai/nn/optimizer/cpu_adam.py
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@@ -146,8 +146,7 @@ class CPUAdam(NVMeOptimizer):
assert state["exp_avg"].device.type == "cpu", "exp_avg should stay on cpu"
assert state["exp_avg_sq"].device.type == "cpu", "exp_avg should stay on cpu"
self._pre_update(p, "exp_avg", "exp_avg_sq")
# FIXME(ver217): CPU adam kernel only supports fp32 states now
if p.grad.dtype is torch.bfloat16 or p.dtype is not torch.float:
if p.grad.dtype is torch.bfloat16:
# cpu adam kernel does not support bf16 now
bias_correction1 = 1 - beta1 ** state["step"]
bias_correction2 = 1 - beta2 ** state["step"]