[CPU] FusedAdam and CPU training support#3991
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tjruwase merged 24 commits intodeepspeedai:masterfrom Jul 25, 2023
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@tjruwase note we also have a PR in DeepSpeedExamples to demostrate CIFAR10 training with CPU. The PR also fix test broken for pytorch 2.0 because of API change. |
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Also added CPUAdamBuilder for CPU accelerator, so HelloDeepSpeed which use cpu offload can run. |
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Jul 25, 2023
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This PR implements FusedAdam and also enables CPU training with ZeRO stage 0-3. Note FP16 data type are not supported for CPU training. BF16 is the preferred datatype.
For ZeRO stage 0, this PR depends on #3842.
Whats in this PR:
This PR had been verified on CIFAR10 in DeepSpeedExamples, A PR had been submitted to support BF16 data type for CIFAR10 deepspeedai/DeepSpeedExamples#651 . Note for Zero0/1, there is an accuracy bug in DeepSpeed supporting BF16 training (#3979), for Zero2/3, accuracy is correct.