set torchao quant config on config.json of saved model

* add validation around cce + chunked_ce

* return on end of validation method

.coderabbit.yaml

@@ -0,0 +1,16 @@
+# yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json
+language: "en-US"
+early_access: false
+reviews:
+  profile: "chill"
+  request_changes_workflow: false
+  high_level_summary: true
+  review_status: true
+  collapse_walkthrough: true
+  poem: false
+  sequence_diagrams: false
+  auto_review:
+    enabled: true
+    drafts: false
+chat:
+  auto_reply: true

.github/workflows/main.yml

@@ -87,7 +87,6 @@ jobs:
             python_version: "3.11"
             pytorch: 2.6.0
             axolotl_extras:
-            is_latest: true
           - cuda: 126
             cuda_version: 12.6.3
             python_version: "3.11"
@@ -98,6 +97,7 @@ jobs:
             python_version: "3.11"
             pytorch: 2.7.1
             axolotl_extras:
+            is_latest: true
           - cuda: 128
             cuda_version: 12.8.1
             python_version: "3.11"

.github/workflows/tests-nightly.yml

@@ -92,7 +92,7 @@ jobs:
     if: github.repository_owner == 'axolotl-ai-cloud'
     # this job needs to be run on self-hosted GPU runners...
     runs-on: [self-hosted, modal]
-    timeout-minutes: 60
+    timeout-minutes: 120
     needs: [pre-commit, pytest]
 
     strategy:
@@ -106,6 +106,13 @@ jobs:
             num_gpus: 1
             axolotl_extras:
             nightly_build: "true"
+          - cuda: 126
+            cuda_version: 12.6.3
+            python_version: "3.11"
+            pytorch: 2.7.1
+            num_gpus: 1
+            axolotl_extras:
+            nightly_build: "true"
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -116,7 +123,7 @@ jobs:
       - name: Install Modal
         run: |
           python -m pip install --upgrade pip
-          pip install modal==0.71.8 jinja2
+          pip install modal==1.0.2 jinja2
       - name: Update env vars
         run: |
           echo "BASE_TAG=main-base-py${{ matrix.python_version }}-cu${{ matrix.cuda }}-${{ matrix.pytorch }}" >> $GITHUB_ENV
@@ -130,3 +137,45 @@ jobs:
       - name: Run tests job on Modal
         run: |
           modal run cicd.e2e_tests
+  docker-e2e-multigpu-tests:
+    if: github.repository_owner == 'axolotl-ai-cloud'
+    # this job needs to be run on self-hosted GPU runners...
+    runs-on: [self-hosted, modal]
+    timeout-minutes: 120
+    needs: [pre-commit, pytest, docker-e2e-tests]
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - cuda: 126
+            cuda_version: 12.6.3
+            python_version: "3.11"
+            pytorch: 2.7.1
+            num_gpus: 2
+            axolotl_extras:
+            nightly_build: "true"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Install Modal
+        run: |
+          python -m pip install --upgrade pip
+          pip install modal==1.0.2 jinja2
+      - name: Update env vars
+        run: |
+          echo "BASE_TAG=main-base-py${{ matrix.python_version }}-cu${{ matrix.cuda }}-${{ matrix.pytorch }}" >> $GITHUB_ENV
+          echo "PYTORCH_VERSION=${{ matrix.pytorch}}" >> $GITHUB_ENV
+          echo "AXOLOTL_ARGS=${{ matrix.axolotl_args}}" >> $GITHUB_ENV
+          echo "AXOLOTL_EXTRAS=${{ matrix.axolotl_extras}}" >> $GITHUB_ENV
+          echo "CUDA=${{ matrix.cuda }}" >> $GITHUB_ENV
+          echo "N_GPUS=${{ matrix.num_gpus }}" >> $GITHUB_ENV
+          echo "NIGHTLY_BUILD=${{ matrix.nightly_build }}" >> $GITHUB_ENV
+          echo "CODECOV_TOKEN=${{ secrets.CODECOV_TOKEN }}" >> $GITHUB_ENV
+      - name: Run tests job on Modal
+        run: |
+          modal run cicd.multigpu

codecov.yml

@@ -22,6 +22,7 @@ coverage:
         only_pulls: true
         flags: null
         paths: null
+        informational: true
     patch:
       default:
         # basic

examples/colab-notebooks/colab-axolotl-example.ipynb

@@ -40,7 +40,7 @@
         "%%capture\n",
         "# This step can take ~5-10 minutes to install dependencies\n",
         "!pip install --no-build-isolation axolotl[flash-attn]>=0.9.1\n",
-        "!pip install \"cut-cross-entropy[transformers] @ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@78b2a45713a54c9bedf8b33f5e31cf07a1a57154\""
+        "!pip install \"cut-cross-entropy[transformers] @ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@50cef19\""
       ]
     },
     {

requirements.txt

@@ -15,7 +15,7 @@ huggingface_hub>=0.33.0
 peft==0.16.0
 transformers==4.53.2
 tokenizers>=0.21.1
-accelerate==1.8.1
+accelerate==1.9.0
 datasets==4.0.0
 deepspeed>=0.17.0
 trl==0.19.1
@@ -26,7 +26,7 @@ hf_transfer
 sentencepiece
 gradio==5.23.3
 
-modal==0.70.5
+modal==1.0.2
 pydantic==2.10.6
 addict
 fire

scripts/cutcrossentropy_install.py

@@ -29,5 +29,5 @@ UV_PREFIX = "uv " if USE_UV else ""
 
 print(
     UNINSTALL_PREFIX
-    + f'{UV_PREFIX}pip install "cut-cross-entropy[transformers] @ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@865b899"'
+    + f'{UV_PREFIX}pip install "cut-cross-entropy[transformers] @ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@50cef19"'
 )

src/axolotl/cli/quantize.py

@@ -43,7 +43,7 @@ def do_quantize(
             "No quantization configuration found. Please specify either qat or quantization in your config file."
         )
 
-    model_path = cli_args.get("model_path") or cfg.output_dir
+    model_path = cli_args.get("base_model") or cfg.output_dir
     if weight_dtype := cli_args.get("weight_dtype"):
         weight_dtype = TorchIntDType[weight_dtype]
     else:

src/axolotl/core/datasets/chat.py

@@ -2,7 +2,6 @@
 chat dataset module
 """
 
-import os
 from typing import Callable, Optional, Union
 
 from datasets import Dataset
@@ -41,14 +40,10 @@ class TokenizedChatDataset(Dataset):
                 )
             return ex.tokenized(model_transform)
 
-        process_or_cpu_count: int = (
-            process_count or os.cpu_count()  # type: ignore[assignment]
-        )
-        num_proc = min(32, process_or_cpu_count)
         features = data.features.keys()
         tokenized_data = data.map(
             map_fn,
-            num_proc=num_proc,
+            num_proc=process_count,
             keep_in_memory=keep_in_memory,
             remove_columns=features,
             desc="Tokenizing Chats",

src/axolotl/core/trainers/grpo/__init__.py

@@ -148,7 +148,7 @@ class GRPOStrategy:
 
     @classmethod
     def get_blocklist_args_kwargs(cls) -> list[str]:
-        return ["dataset_num_proc", "max_length"]
+        return ["dataset_num_proc", "max_length", "include_tokens_per_second"]
 
     @classmethod
     def get_reward_func(cls, reward_func_fqn: str) -> RewardFunc:

src/axolotl/datasets.py

@@ -1,7 +1,5 @@
 """Module containing Dataset functionality"""
 
-import os
-
 import torch
 from datasets import Dataset, IterableDataset
 
@@ -46,7 +44,6 @@ class TokenizedPromptDataset(Dataset):
 
     def process(self, dataset):
         features = dataset.features.keys()
-        num_proc = min(64, self.process_count if self.process_count else os.cpu_count())
 
         map_kwargs = {}
         if self.prompt_tokenizer.supports_batched:
@@ -59,13 +56,13 @@ class TokenizedPromptDataset(Dataset):
         ):
             dataset = dataset.filter(
                 self.prompt_tokenizer.filter_rows,
-                num_proc=num_proc,
+                num_proc=self.process_count,
                 desc="Strategy Filtering Rows",
             )
 
         return dataset.map(
             self.prompt_tokenizer.tokenize_prompt,
-            num_proc=num_proc,
+            num_proc=self.process_count,
             remove_columns=features,
             keep_in_memory=self.keep_in_memory,
             desc="Tokenizing Prompts",

src/axolotl/integrations/cut_cross_entropy/README.md

@@ -19,7 +19,7 @@ python scripts/cutcrossentropy_install.py | sh
 
 - If you are installing from pip
 ```bash
-pip3 uninstall -y cut-cross-entropy && pip3 install "cut-cross-entropy[transformers] @ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@865b899"
+pip3 uninstall -y cut-cross-entropy && pip3 install "cut-cross-entropy[transformers] @ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@50cef19"
 ```
 
 ## Usage

src/axolotl/integrations/cut_cross_entropy/__init__.py

@@ -19,11 +19,13 @@ Cut Cross Entropy is an optimized implementation of cross entropy loss
 from Apple's ML team.
 """
 import importlib
+from functools import partial
 
 import torch
 
 from axolotl.integrations.base import BasePlugin
 from axolotl.utils import get_pytorch_version
+from axolotl.utils.callbacks.models import get_causal_lm_model_cls_prefix
 from axolotl.utils.logging import get_logger
 
 from .args import CutCrossEntropyArgs  # pylint: disable=unused-import. # noqa: F401
@@ -32,7 +34,7 @@ LOG = get_logger(__name__)
 
 _CCE_INSTALL_MESSAGE = (
     "Please install Axolotl's fork of cut_cross_entropy with transformers support using "
-    '`pip install "cut-cross-entropy[transformers] @ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@865b899"`'
+    '`pip install "cut-cross-entropy[transformers] @ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@50cef19"`'
 )
 
 
@@ -84,6 +86,7 @@ class CutCrossEntropyPlugin(BasePlugin):
         """Apply cut cross entropy before model loading if enabled."""
         if cfg.cut_cross_entropy:
             self._check_requirements()
+            self.patch_llama_like(cfg.model_config_type)
 
             from cut_cross_entropy.transformers.patch import cce_patch
 
@@ -93,3 +96,48 @@ class CutCrossEntropyPlugin(BasePlugin):
 
             # The patch checks model_type internally
             cce_patch(cfg.model_config_type)
+
+    def patch_llama_like(
+        self,
+        model_type: str,
+    ) -> None:
+        """
+        Generic patch for model architectures with causal lm similar to llama
+        """
+        from cut_cross_entropy.transformers.patch import PATCH_FNS
+
+        def patch_generic(
+            maybe_model, patch_options, model_type: str
+        ):  # pylint: disable=unused-argument
+            import cut_cross_entropy.transformers.llama
+            from cut_cross_entropy.transformers.llama import cce_forward
+
+            try:
+                # Dynamically import the module and CausalLM class
+                module_path = f"transformers.models.{model_type}.modeling_{model_type}"
+                model_cls_prefix, _ = get_causal_lm_model_cls_prefix(model_type)
+                module = __import__(
+                    module_path, fromlist=[f"{model_cls_prefix}ForCausalLM"]
+                )
+                model_cls = getattr(module, f"{model_cls_prefix}ForCausalLM")
+
+                cut_cross_entropy.transformers.llama._PATCH_OPTS = (  # pylint: disable=protected-access
+                    patch_options
+                )
+
+                model_cls.forward = cce_forward
+            # pylint: disable=duplicate-code
+            except (ImportError, AttributeError) as e:
+                raise RuntimeError(
+                    f"Could not import ForCausalLM class for model_type: {model_type}. "
+                    f"Error: {str(e)}"
+                ) from e
+
+        if model_type not in PATCH_FNS:
+            LOG.warning_once(
+                "Setting up generic cce patch for model type: %s", model_type
+            )
+            LOG.warning_once(
+                f"Generic Cut Cross Entropy + {model_type} support is experimental and may not work as expected."
+            )
+            PATCH_FNS[model_type] = partial(patch_generic, model_type=model_type)

src/axolotl/integrations/cut_cross_entropy/args.py

@@ -41,3 +41,13 @@ class CutCrossEntropyArgs(BaseModel):
             )
 
         return data
+
+    @model_validator(mode="before")
+    @classmethod
+    def check_chunked_cross_entropy_not_set(cls, data):
+        if data.get("chunked_cross_entropy"):
+            raise ValueError(
+                "Cut Cross Entropy does not support chunked cross entropy. "
+                "Please set `chunked_cross_entropy` to `False` or disable Cut Cross Entropy."
+            )
+        return data

src/axolotl/integrations/kd/kernels/models.py

@@ -22,6 +22,8 @@ except ImportError:
         TransformersKwargs,
     )
 
+from axolotl.utils.callbacks.models import get_causal_lm_model_cls_prefix
+
 
 def kldiv_forward_llama_like(
     self,
@@ -97,7 +99,7 @@ def kldiv_forward_llama_like(
 def apply_kernel(model_type):
     # Dynamically import the module and attention class
     module_path = f"transformers.models.{model_type}.modeling_{model_type}"
-    model_cls_prefix = "".join([part.capitalize() for part in model_type.split("_")])
+    model_cls_prefix, _ = get_causal_lm_model_cls_prefix(model_type)
     module = __import__(module_path, fromlist=[f"{model_cls_prefix}ForCausalLM"])
     model_cls = getattr(module, f"{model_cls_prefix}ForCausalLM")
     model_cls.forward = kldiv_forward_llama_like

src/axolotl/integrations/liger/__init__.py

@@ -18,170 +18,10 @@ Module for the Plugin for LIGER integraton with Axolotl.
 Liger Kernel is the collection of Triton-native kernels for LLM Training.
 It is designed to be performant, correct, and light-weight.
 """
-import inspect
-import sys
+from .args import LigerArgs
+from .plugin import LigerPlugin
 
-from axolotl.integrations.base import BasePlugin
-from axolotl.utils.logging import get_logger
-
-from .args import LigerArgs  # pylint: disable=unused-import. # noqa: F401
-from .utils import patch_with_compile_disable
-
-LOG = get_logger(__name__)
-
-
-class LigerPlugin(BasePlugin):
-    """
-    Plugin for LIGER integraton with Axolotl.
-    """
-
-    def get_input_args(self):
-        return "axolotl.integrations.liger.LigerArgs"
-
-    def pre_model_load(self, cfg):
-        if cfg.torch_compile:
-            # torch compile will unnecessarily attempt to optimize the triton kernel unless explicitly disabled
-            import liger_kernel.ops.fused_linear_cross_entropy
-
-            patch_with_compile_disable(
-                liger_kernel.ops.fused_linear_cross_entropy,
-                "fused_linear_cross_entropy_forward",
-            )
-            patch_with_compile_disable(
-                liger_kernel.ops.fused_linear_cross_entropy,
-                "fused_linear_cross_entropy_backward",
-            )
-        from liger_kernel.transformers.cross_entropy import LigerCrossEntropyLoss
-        from liger_kernel.transformers.functional import liger_cross_entropy
-        from liger_kernel.transformers.layer_norm import LigerLayerNorm
-        from liger_kernel.transformers.monkey_patch import MODEL_TYPE_TO_APPLY_LIGER_FN
-        from liger_kernel.transformers.rms_norm import LigerRMSNorm
-        from liger_kernel.transformers.rope import liger_rotary_pos_emb
-        from liger_kernel.transformers.swiglu import LigerSwiGLUMLP
-
-        if cfg.liger_cross_entropy and cfg.liger_fused_linear_cross_entropy:
-            raise ValueError(
-                "Cannot have both `liger_cross_entropy` and `liger_fused_linear_cross_entropy` set."
-            )
-
-        if cfg.model_config_type in MODEL_TYPE_TO_APPLY_LIGER_FN:
-            apply_liger_fn = MODEL_TYPE_TO_APPLY_LIGER_FN[cfg.model_config_type]
-            liger_fn_sig = inspect.signature(apply_liger_fn)
-            kwargs = {}
-            if "rope" in liger_fn_sig.parameters:
-                kwargs["rope"] = cfg.liger_rope
-            if "cross_entropy" in liger_fn_sig.parameters:
-                kwargs["cross_entropy"] = cfg.liger_cross_entropy
-            if "fused_linear_cross_entropy" in liger_fn_sig.parameters:
-                kwargs["fused_linear_cross_entropy"] = (
-                    cfg.liger_fused_linear_cross_entropy
-                )
-            if "rms_norm" in liger_fn_sig.parameters:
-                kwargs["rms_norm"] = cfg.liger_rms_norm
-            if "layer_norm" in liger_fn_sig.parameters:
-                kwargs["layer_norm"] = cfg.liger_layer_norm
-            if "geglu" in liger_fn_sig.parameters:
-                kwargs["geglu"] = cfg.liger_glu_activation
-            elif "swiglu" in liger_fn_sig.parameters:
-                kwargs["swiglu"] = cfg.liger_glu_activation
-            LOG.info(f"Applying LIGER to {cfg.model_config_type} with kwargs: {kwargs}")
-            apply_liger_fn(**kwargs)
-        elif cfg.model_config_type == "jamba":
-            from transformers.models.jamba import modeling_jamba
-
-            from .models.jamba import lce_forward as jamba_lce_forward
-
-            if cfg.liger_rope:
-                modeling_jamba.apply_rotary_pos_emb = liger_rotary_pos_emb
-            if cfg.liger_rms_norm:
-                modeling_jamba.JambaRMSNorm = LigerRMSNorm
-            if cfg.liger_glu_activation:
-                modeling_jamba.JambaMLP = LigerSwiGLUMLP
-            if cfg.liger_layer_norm:
-                modeling_jamba.nn.LayerNorm = LigerLayerNorm
-            if cfg.liger_cross_entropy:
-                from transformers.loss.loss_utils import nn
-
-                nn.functional.cross_entropy = liger_cross_entropy
-            if cfg.liger_fused_linear_cross_entropy:
-                modeling_jamba.JambaForCausalLM.forward = jamba_lce_forward
-        elif cfg.model_config_type == "deepseek_v2":
-            from accelerate import init_empty_weights
-            from transformers import AutoModelForCausalLM
-
-            with init_empty_weights():
-                model = AutoModelForCausalLM.from_pretrained(
-                    cfg.base_model, trust_remote_code=cfg.trust_remote_code or False
-                )
-                modeling_mod = sys.modules[model.__class__.__module__]
-
-            from .models.deepseekv2 import lce_forward as deepseekv2_lce_forward
-
-            if cfg.liger_rope:
-                # The DeepseekV2 version of RoPE is different than upstream LLaMA.
-                # See https://github.com/linkedin/Liger-Kernel/issues/129#issuecomment-2313763528
-                LOG.warning("Fused liger_rope is not supported for DeepseekV2.")
-            if cfg.liger_glu_activation:
-                LOG.warning("liger_glu_activation is not supported for DeepseekV2.")
-            if cfg.liger_rms_norm:
-                modeling_mod.DeepseekV2RMSNorm = LigerRMSNorm
-            if cfg.liger_glu_activation:
-                modeling_mod.DeepseekV2MLP.forward = LigerSwiGLUMLP.forward
-            if cfg.liger_layer_norm:
-                modeling_mod.DeepseekV2MLP.forward = LigerLayerNorm.forward
-            if cfg.liger_cross_entropy:
-                # We do not patch `nn.functional.cross_entropy` for DeepseekV2 as it still uses
-                # nn.CrossEntropyLoss in the forward method.
-                modeling_mod.CrossEntropyLoss = LigerCrossEntropyLoss
-            if cfg.liger_fused_linear_cross_entropy:
-                modeling_mod.DeepseekV2ForCausalLM.forward = deepseekv2_lce_forward
-        elif cfg.model_config_type == "llama4":
-            from axolotl.integrations.liger.models.llama4 import (
-                apply_liger_kernel_to_llama4,
-            )
-
-            apply_liger_kernel_to_llama4(
-                cross_entropy=cfg.liger_cross_entropy,
-                fused_linear_cross_entropy=cfg.liger_fused_linear_cross_entropy,
-                glu_activation=cfg.liger_glu_activation,
-                rms_norm=cfg.liger_rms_norm,
-                layer_norm=cfg.liger_layer_norm,
-            )
-        elif cfg.model_config_type == "qwen3":
-            from axolotl.integrations.liger.models.qwen3 import (
-                apply_liger_kernel_to_qwen3,
-            )
-
-            apply_liger_kernel_to_qwen3(
-                cross_entropy=cfg.liger_cross_entropy,
-                fused_linear_cross_entropy=cfg.liger_fused_linear_cross_entropy,
-                glu_activation=cfg.liger_glu_activation,
-                rms_norm=cfg.liger_rms_norm,
-                layer_norm=cfg.liger_layer_norm,
-            )
-        elif cfg.model_config_type == "qwen3_moe":
-            from axolotl.integrations.liger.models.qwen3_moe import (
-                apply_liger_kernel_to_qwen3_moe,
-            )
-
-            apply_liger_kernel_to_qwen3_moe(
-                cross_entropy=cfg.liger_cross_entropy,
-                fused_linear_cross_entropy=cfg.liger_fused_linear_cross_entropy,
-                glu_activation=cfg.liger_glu_activation,
-                rms_norm=cfg.liger_rms_norm,
-                layer_norm=cfg.liger_layer_norm,
-            )
-        elif cfg.model_config_type == "granitemoe":
-            from liger_kernel.transformers import apply_liger_kernel_to_granite
-
-            apply_liger_kernel_to_granite(
-                rope=cfg.liger_rope,
-                cross_entropy=cfg.liger_cross_entropy,
-                fused_linear_cross_entropy=cfg.liger_fused_linear_cross_entropy,
-                rms_norm=cfg.liger_rms_norm,
-                swiglu=cfg.liger_glu_activation,
-            )
-        else:
-            LOG.warning(
-                f"Unsupported model config type: {cfg.model_config_type}. Liger not applied."
-            )
+__all__ = [
+    "LigerArgs",
+    "LigerPlugin",
+]

src/axolotl/integrations/liger/models/base.py

@@ -0,0 +1,189 @@
+"""
+Generic FLCE patch for untested models similar to Llama
+"""
+
+from typing import Optional, Tuple, Union
+
+import torch
+from liger_kernel.transformers.model.loss_utils import LigerForCausalLMLoss
+from liger_kernel.transformers.trainer.orpo_trainer import _FSDPForwardRedirection
+from liger_kernel.utils import PEFT_AVAILABLE
+from peft.utils import ModulesToSaveWrapper
+from torch.distributed.fsdp import FullyShardedDataParallel
+from transformers.modeling_outputs import CausalLMOutputWithPast
+
+from axolotl.utils.callbacks.models import get_causal_lm_model_cls_prefix
+
+
+def lce_forward(
+    self,
+    *args,
+    output_attentions: Optional[bool] = None,
+    output_hidden_states: Optional[bool] = None,
+    return_dict: Optional[bool] = None,
+    labels: Optional[torch.LongTensor] = None,
+    logits_to_keep: Union[int, torch.Tensor] = 0,
+    skip_logits: Optional[bool] = None,
+    **kwargs,
+) -> Union[Tuple, CausalLMOutputWithPast]:
+    r"""
+    Args:
+        labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
+            Labels for computing the masked language modeling loss. Indices should either be in `[0, ...,
+            config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored
+            (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`.
+
+        logits_to_keep (`int` or `torch.Tensor`, *optional*):
+            If an `int`, compute logits for the last `logits_to_keep` tokens. If `0`, calculate logits for all
+            `input_ids` (special case). Only last token logits are needed for generation, and calculating them only for that
+            token can save memory, which becomes pretty significant for long sequences or large vocabulary size.
+            If a `torch.Tensor`, must be 1D corresponding to the indices to keep in the sequence length dimension.
+            This is useful when using packed tensor format (single dimension for batch and sequence length).
+    """
+
+    # pylint: disable=duplicate-code
+    output_attentions = (
+        output_attentions
+        if output_attentions is not None
+        else self.config.output_attentions
+    )
+    output_hidden_states = (
+        output_hidden_states
+        if output_hidden_states is not None
+        else self.config.output_hidden_states
+    )
+
+    return_dict = (
+        return_dict if return_dict is not None else self.config.use_return_dict
+    )
+
+    # decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
+    outputs = self.model(
+        *args,
+        output_attentions=output_attentions,
+        output_hidden_states=output_hidden_states,
+        **kwargs,
+    )
+
+    hidden_states = outputs[0]
+    # Only compute necessary logits, and do not upcast them to float if we are not computing the loss
+    slice_indices = (
+        slice(-logits_to_keep, None)
+        if isinstance(logits_to_keep, int)
+        else logits_to_keep
+    )
+    kept_hidden_states = hidden_states[:, slice_indices, :]
+
+    shift_labels = kwargs.pop("shift_labels", None)
+    logits = None
+    loss = None
+
+    # if in training mode, don't materialize logits
+    if skip_logits and labels is None and shift_labels is None:
+        raise ValueError("skip_logits is True, but labels and shift_labels are None")
+
+    if skip_logits is None:
+        # By default, if in training mode, don't materialize logits
+        skip_logits = self.training and (labels is not None or shift_labels is not None)
+
+    if skip_logits:
+        loss = lce_maybe_trainable_lm_head(
+            self,
+            hidden_states=kept_hidden_states,
+            hidden_size=self.config.hidden_size,
+            labels=labels,
+            shift_labels=shift_labels,
+            **kwargs,
+        )
+
+    else:
+        logits = self.lm_head(kept_hidden_states)
+        if labels is not None:
+            loss = self.loss_function(
+                logits=logits,
+                labels=labels,
+                vocab_size=self.config.vocab_size,
+                **kwargs,
+            )
+
+    if not return_dict:
+        output = (logits,) + outputs[1:]
+        return (loss,) + output if loss is not None else output
+
+    return CausalLMOutputWithPast(
+        loss=loss,
+        logits=logits,
+        past_key_values=outputs.past_key_values,
+        hidden_states=outputs.hidden_states,
+        attentions=outputs.attentions,
+    )
+
+
+def lce_maybe_trainable_lm_head(
+    self, hidden_states, hidden_size, labels, shift_labels, **loss_kwargs
+):
+    lm_head = self.lm_head
+
+    # Unwrap the module if lm_head has been added as trainable module in PEFT LoRA configuration,
+    # i.e. listed in the modules_to_save field of LoraConfig, so the lm_head weights are read
+    # from the unwrapped module.
+    # See https://huggingface.co/docs/peft/package_reference/lora for reference.
+    if PEFT_AVAILABLE and isinstance(lm_head, ModulesToSaveWrapper):
+        lm_head = lm_head.modules_to_save.default
+
+    # If FSDP is used and lm_head is trainable, e.g., during full fine-tuning or with LoRA,
+    # reading the lm_head module weights and calling the kernel must be done within FSDP forward pass
+    # so the module entire parameters are summoned and kept in memory during the kernel execution.
+    if isinstance(lm_head, FullyShardedDataParallel):
+        return _FSDPForwardRedirection()(
+            lm_head,
+            _liger_for_causal_lm_loss,
+            lm_head.module,
+            hidden_states,
+            hidden_size,
+            labels,
+            shift_labels,
+            **loss_kwargs,
+        )
+
+    # FSDP is not used so we can read the lm_head weights and call the kernel directly
+    return _liger_for_causal_lm_loss(
+        lm_head=self.lm_head,
+        hidden_states=hidden_states,
+        hidden_size=hidden_size,
+        labels=labels,
+        shift_labels=shift_labels,
+        **loss_kwargs,
+    )
+
+
+def _liger_for_causal_lm_loss(
+    lm_head, hidden_states, hidden_size, labels, shift_labels, **loss_kwargs
+):
+    return LigerForCausalLMLoss(
+        hidden_states=hidden_states,
+        lm_head_weight=lm_head.weight,
+        labels=labels,
+        hidden_size=hidden_size,
+        shift_labels=shift_labels,
+        **loss_kwargs,
+    )
+
+
+def patch_lce_forward(
+    model_type,
+):
+    try:
+        # Dynamically import the module and MLP class
+        module_path = f"transformers.models.{model_type}.modeling_{model_type}"
+        model_cls_prefix, _ = get_causal_lm_model_cls_prefix(model_type)
+        module = __import__(module_path, fromlist=[f"{model_cls_prefix}ForCausalLM"])
+        model_cls = getattr(module, f"{model_cls_prefix}ForCausalLM")
+
+        model_cls.forward = lce_forward
+    # pylint: disable=duplicate-code
+    except (ImportError, AttributeError) as e:
+        raise RuntimeError(
+            f"Could not import ForCausalLM class for model_type: {model_type}. "
+            f"Error: {str(e)}"
+        ) from e

src/axolotl/integrations/liger/plugin.py

@@ -0,0 +1,182 @@
+"""
+Liger-Kernel Plugin for Axolotl
+"""
+
+import inspect
+import sys
+
+from axolotl.integrations.base import BasePlugin
+from axolotl.utils.logging import get_logger
+
+from .models.base import patch_lce_forward
+from .utils import patch_with_compile_disable
+
+LOG = get_logger(__name__)
+
+
+class LigerPlugin(BasePlugin):
+    """
+    Plugin for LIGER integraton with Axolotl.
+    """
+
+    def get_input_args(self):
+        return "axolotl.integrations.liger.LigerArgs"
+
+    def pre_model_load(self, cfg):
+        if cfg.torch_compile:
+            # torch compile will unnecessarily attempt to optimize the triton kernel unless explicitly disabled
+            import liger_kernel.ops.fused_linear_cross_entropy
+
+            patch_with_compile_disable(
+                liger_kernel.ops.fused_linear_cross_entropy,
+                "fused_linear_cross_entropy_forward",
+            )
+            patch_with_compile_disable(
+                liger_kernel.ops.fused_linear_cross_entropy,
+                "fused_linear_cross_entropy_backward",
+            )
+        from liger_kernel.transformers.cross_entropy import LigerCrossEntropyLoss
+        from liger_kernel.transformers.functional import liger_cross_entropy
+        from liger_kernel.transformers.layer_norm import LigerLayerNorm
+        from liger_kernel.transformers.monkey_patch import MODEL_TYPE_TO_APPLY_LIGER_FN
+        from liger_kernel.transformers.rms_norm import LigerRMSNorm
+        from liger_kernel.transformers.rope import liger_rotary_pos_emb
+        from liger_kernel.transformers.swiglu import LigerSwiGLUMLP
+
+        if cfg.liger_cross_entropy and cfg.liger_fused_linear_cross_entropy:
+            raise ValueError(
+                "Cannot have both `liger_cross_entropy` and `liger_fused_linear_cross_entropy` set."
+            )
+
+        if cfg.model_config_type in MODEL_TYPE_TO_APPLY_LIGER_FN:
+            apply_liger_fn = MODEL_TYPE_TO_APPLY_LIGER_FN[cfg.model_config_type]
+            liger_fn_sig = inspect.signature(apply_liger_fn)
+            kwargs = {}
+            if "rope" in liger_fn_sig.parameters:
+                kwargs["rope"] = cfg.liger_rope
+            if "cross_entropy" in liger_fn_sig.parameters:
+                kwargs["cross_entropy"] = cfg.liger_cross_entropy
+            if "fused_linear_cross_entropy" in liger_fn_sig.parameters:
+                kwargs["fused_linear_cross_entropy"] = (
+                    cfg.liger_fused_linear_cross_entropy
+                )
+            if "rms_norm" in liger_fn_sig.parameters:
+                kwargs["rms_norm"] = cfg.liger_rms_norm
+            if "layer_norm" in liger_fn_sig.parameters:
+                kwargs["layer_norm"] = cfg.liger_layer_norm
+            if "geglu" in liger_fn_sig.parameters:
+                kwargs["geglu"] = cfg.liger_glu_activation
+            elif "swiglu" in liger_fn_sig.parameters:
+                kwargs["swiglu"] = cfg.liger_glu_activation
+            LOG.info(f"Applying LIGER to {cfg.model_config_type} with kwargs: {kwargs}")
+            apply_liger_fn(**kwargs)
+        elif cfg.model_config_type == "jamba":
+            from transformers.models.jamba import modeling_jamba
+
+            from .models.jamba import lce_forward as jamba_lce_forward
+
+            if cfg.liger_rope:
+                modeling_jamba.apply_rotary_pos_emb = liger_rotary_pos_emb
+            if cfg.liger_rms_norm:
+                modeling_jamba.JambaRMSNorm = LigerRMSNorm
+            if cfg.liger_glu_activation:
+                modeling_jamba.JambaMLP = LigerSwiGLUMLP
+            if cfg.liger_layer_norm:
+                modeling_jamba.nn.LayerNorm = LigerLayerNorm
+            if cfg.liger_cross_entropy:
+                from transformers.loss.loss_utils import nn
+
+                nn.functional.cross_entropy = liger_cross_entropy
+            if cfg.liger_fused_linear_cross_entropy:
+                modeling_jamba.JambaForCausalLM.forward = jamba_lce_forward
+        elif cfg.model_config_type == "deepseek_v2":
+            from accelerate import init_empty_weights
+            from transformers import AutoModelForCausalLM
+
+            with init_empty_weights():
+                model = AutoModelForCausalLM.from_pretrained(
+                    cfg.base_model, trust_remote_code=cfg.trust_remote_code or False
+                )
+                modeling_mod = sys.modules[model.__class__.__module__]
+
+            from .models.deepseekv2 import lce_forward as deepseekv2_lce_forward
+
+            if cfg.liger_rope:
+                # The DeepseekV2 version of RoPE is different than upstream LLaMA.
+                # See https://github.com/linkedin/Liger-Kernel/issues/129#issuecomment-2313763528
+                LOG.warning("Fused liger_rope is not supported for DeepseekV2.")
+            if cfg.liger_rms_norm:
+                modeling_mod.DeepseekV2RMSNorm = LigerRMSNorm
+            if cfg.liger_glu_activation:
+                modeling_mod.DeepseekV2MLP.forward = LigerSwiGLUMLP.forward
+            if cfg.liger_layer_norm:
+                LOG.warning("liger_layer_norm is not supported for DeepseekV2.")
+            if cfg.liger_cross_entropy:
+                # We do not patch `nn.functional.cross_entropy` for DeepseekV2 as it still uses
+                # nn.CrossEntropyLoss in the forward method.
+                modeling_mod.CrossEntropyLoss = LigerCrossEntropyLoss
+            if cfg.liger_fused_linear_cross_entropy:
+                modeling_mod.DeepseekV2ForCausalLM.forward = deepseekv2_lce_forward
+        elif cfg.model_config_type == "llama4":
+            from axolotl.integrations.liger.models.llama4 import (
+                apply_liger_kernel_to_llama4,
+            )
+
+            apply_liger_kernel_to_llama4(
+                cross_entropy=cfg.liger_cross_entropy,
+                fused_linear_cross_entropy=cfg.liger_fused_linear_cross_entropy,
+                glu_activation=cfg.liger_glu_activation,
+                rms_norm=cfg.liger_rms_norm,
+                layer_norm=cfg.liger_layer_norm,
+            )
+        elif cfg.model_config_type == "qwen3":
+            from axolotl.integrations.liger.models.qwen3 import (
+                apply_liger_kernel_to_qwen3,
+            )
+
+            apply_liger_kernel_to_qwen3(
+                cross_entropy=cfg.liger_cross_entropy,
+                fused_linear_cross_entropy=cfg.liger_fused_linear_cross_entropy,
+                glu_activation=cfg.liger_glu_activation,
+                rms_norm=cfg.liger_rms_norm,
+                layer_norm=cfg.liger_layer_norm,
+            )
+        elif cfg.model_config_type == "qwen3_moe":
+            from axolotl.integrations.liger.models.qwen3_moe import (
+                apply_liger_kernel_to_qwen3_moe,
+            )
+
+            apply_liger_kernel_to_qwen3_moe(
+                cross_entropy=cfg.liger_cross_entropy,
+                fused_linear_cross_entropy=cfg.liger_fused_linear_cross_entropy,
+                glu_activation=cfg.liger_glu_activation,
+                rms_norm=cfg.liger_rms_norm,
+                layer_norm=cfg.liger_layer_norm,
+            )
+        elif cfg.model_config_type == "granitemoe":
+            from liger_kernel.transformers import apply_liger_kernel_to_granite
+
+            apply_liger_kernel_to_granite(
+                rope=cfg.liger_rope,
+                cross_entropy=cfg.liger_cross_entropy,
+                fused_linear_cross_entropy=cfg.liger_fused_linear_cross_entropy,
+                rms_norm=cfg.liger_rms_norm,
+                swiglu=cfg.liger_glu_activation,
+            )
+        elif cfg.liger_fused_linear_cross_entropy:
+            try:
+                patch_lce_forward(cfg.model_config_type)
+                LOG.warning_once(
+                    f"Applied ONLY liger_fused_linear_cross_entropy genericpatches for model type: {cfg.model_config_type}"
+                )
+                LOG.warning_once(
+                    f"Liger + {cfg.model_config_type} generic FLCE support is experimental and may not work as expected."
+                )
+            except RuntimeError:
+                LOG.warning(
+                    f"Unsupported model config type: {cfg.model_config_type}. Liger not applied."
+                )
+        else:
+            LOG.warning(
+                f"Unsupported model config type: {cfg.model_config_type}. Liger not applied."
+            )

src/axolotl/loaders/patch_manager.py

@@ -272,7 +272,11 @@ class PatchManager:
         if self.cfg.tiled_mlp:
             from axolotl.monkeypatch.tiled_mlp import patch_tiled_mlp
 
-            patch_tiled_mlp(model_type, cfg_num_shards=self.cfg.tiled_mlp_num_shards)
+            patch_tiled_mlp(
+                model_type,
+                use_original_mlp=self.cfg.tiled_mlp_use_original_mlp,
+                cfg_num_shards=self.cfg.tiled_mlp_num_shards,
+            )
 
     def _patch_attention(self):
         """Apply attention-specific patches based on model type."""

src/axolotl/loaders/tokenizer.py

@@ -188,7 +188,8 @@ def load_tokenizer(cfg: DictDefault) -> PreTrainedTokenizer:
         tokenizer.padding_side = "left"
 
     # Qwen base only has single token, so we need to set the special tokens
-    if cfg.is_qwen_derived_model:
+    # the following check is for Qwen1 base models
+    if cfg.is_qwen_derived_model and hasattr(tokenizer, "eod_id"):
         token_ids = ["bos_token_id", "eos_token_id", "pad_token_id", "unk_token_id"]
         for attr_name in token_ids:
             if getattr(tokenizer, attr_name) is None:

src/axolotl/logging_config.py

@@ -113,7 +113,7 @@ DEFAULT_LOGGING_CONFIG: Dict[str, Any] = {
     "loggers": {
         "axolotl": {
             "handlers": ["color_console"],
-            "level": os.getenv("AXOLOTL_LOG_LEVEL", DEFAULT_AXOLOTL_LOG_LEVEL),
+            "level": os.getenv("AXOLOTL_LOG_LEVEL", DEFAULT_AXOLOTL_LOG_LEVEL).upper(),
             "propagate": False,
         },
     },

src/axolotl/monkeypatch/lora_kernels.py

@@ -18,6 +18,7 @@ from axolotl.kernels.lora import (
     apply_lora_qkv,
 )
 from axolotl.monkeypatch.utils import detab_code
+from axolotl.utils.callbacks.models import get_causal_lm_model_cls_prefix
 from axolotl.utils.dict import DictDefault
 from axolotl.utils.logging import get_logger
 
@@ -150,12 +151,15 @@ def get_attention_cls_from_config(cfg: DictDefault) -> Type[nn.Module]:
 
         return MllamaTextSelfAttention
 
+    if model_type == "llama4":
+        from transformers.models.llama4.modeling_llama4 import Llama4TextAttention
+
+        return Llama4TextAttention
+
     try:
         # Dynamically import the module and attention class
         module_path = f"transformers.models.{model_type}.modeling_{model_type}"
-        model_cls_prefix = "".join(
-            [part.capitalize() for part in model_type.split("_")]
-        )
+        model_cls_prefix, _ = get_causal_lm_model_cls_prefix(model_type)
         module = __import__(module_path, fromlist=[f"{model_cls_prefix}Attention"])
         attention_cls = getattr(module, f"{model_cls_prefix}Attention")
 

src/axolotl/monkeypatch/tiled_mlp.py

@@ -6,6 +6,8 @@ import os
 import torch
 import torch.distributed as dist
 
+from axolotl.utils.callbacks.models import get_causal_lm_model_cls_prefix
+
 
 def patch_tiled_mlp(model_type, use_original_mlp=False, cfg_num_shards=None):
     from deepspeed.runtime.sequence_parallel.ulysses_sp import TiledMLP
@@ -13,9 +15,7 @@ def patch_tiled_mlp(model_type, use_original_mlp=False, cfg_num_shards=None):
     try:
         # Dynamically import the module and MLP class
         module_path = f"transformers.models.{model_type}.modeling_{model_type}"
-        model_cls_prefix = "".join(
-            [part.capitalize() for part in model_type.split("_")]
-        )
+        model_cls_prefix, _ = get_causal_lm_model_cls_prefix(model_type)
         module = __import__(module_path, fromlist=[f"{model_cls_prefix}MLP"])
         mlp_cls = getattr(module, f"{model_cls_prefix}MLP")
 
@@ -45,11 +45,12 @@ def patch_tiled_mlp(model_type, use_original_mlp=False, cfg_num_shards=None):
             else:
                 num_shards = cfg_num_shards
 
-            compute_params = [
-                self.down_proj.weight,
-                self.gate_proj.weight,
-                self.up_proj.weight,
-            ]
+            if not self._compute_params:  # pylint: disable=protected-access
+                self._compute_params = [  # pylint: disable=protected-access
+                    p for p in self.parameters() if p.requires_grad
+                ]
+
+            compute_params = self._compute_params  # pylint: disable=protected-access
 
             down_res = TiledMLP.apply(
                 mlp_forward,
@@ -61,6 +62,7 @@ def patch_tiled_mlp(model_type, use_original_mlp=False, cfg_num_shards=None):
             return down_res
 
         mlp_cls.forward = tiled_mlp_forward
+        mlp_cls._compute_params = []  # pylint: disable=protected-access
     except (ImportError, AttributeError) as e:
         raise RuntimeError(
             f"Could not import MLP class for model_type: {model_type}. "

src/axolotl/utils/callbacks/__init__.py

@@ -798,7 +798,7 @@ class SaveAxolotlConfigtoWandBCallback(TrainerCallback):
         control: TrainerControl,
         **kwargs,  # pylint: disable=unused-argument
     ):
-        if is_main_process():
+        if state.is_world_process_zero:
             try:
                 # sync config to top level in run, cannot delete file right away because wandb schedules it to be synced even w/policy = 'now', so let OS delete it later.
                 with NamedTemporaryFile(

src/axolotl/utils/callbacks/models.py

@@ -0,0 +1,23 @@
+"""Helper functions for model classes"""
+
+from typing import Tuple
+
+from transformers.models.auto.modeling_auto import MODEL_FOR_CAUSAL_LM_MAPPING_NAMES
+
+
+def get_causal_lm_model_cls_prefix(model_type: str) -> Tuple[str, str]:
+    if model_type in MODEL_FOR_CAUSAL_LM_MAPPING_NAMES:
+        causal_lm_cls = MODEL_FOR_CAUSAL_LM_MAPPING_NAMES[model_type]
+        causal_lm_cls_prefix = causal_lm_cls
+        for suffix in [
+            "ForCausalLM",
+            "ForConditionalGeneration",
+            "LMHeadModel",
+            "GenerationDecoder",
+        ]:
+            causal_lm_cls_prefix = causal_lm_cls_prefix.replace(suffix, "")
+        return causal_lm_cls_prefix, causal_lm_cls
+    causal_lm_cls_prefix = "".join(
+        [part.capitalize() for part in model_type.split("_")]
+    )
+    return causal_lm_cls_prefix, f"{causal_lm_cls_prefix}ForCausalLM"

src/axolotl/utils/config/__init__.py

@@ -148,8 +148,6 @@ def normalize_config(cfg):
                 f"Invalid value for eval_steps ({eval_steps}) from evals_per_epoch and/or num_epochs. Skipping evaluations."
             )
 
-    cfg.dataset_processes = cfg.dataset_processes or os.cpu_count()
-
     if not cfg.base_model_config:
         cfg.base_model_config = cfg.base_model
 

src/axolotl/utils/data/shared.py

@@ -410,9 +410,8 @@ def save_preprocessed_dataset(
 ) -> None:
     """Save preprocessed dataset to disk and optionally push to the HF Hub."""
     prepared_ds_path = get_prepared_dataset_path(cfg, dataset_hash)
+    num_workers = cfg.dataset_processes
     if isinstance(dataset, IterableDataset):
-        num_workers = cfg.dataset_processes
-
         ds_from_iter = Dataset.from_generator(
             functools.partial(_generate_from_iterable_dataset, dataset),
             features=dataset.features,
@@ -423,10 +422,20 @@ def save_preprocessed_dataset(
                 "num_workers": [num_workers] * num_workers,
             },
         )
-        ds_from_iter.save_to_disk(str(prepared_ds_path))
+        ds_from_iter.save_to_disk(
+            str(prepared_ds_path),
+            num_proc=num_workers,
+            max_shard_size=None,
+            num_shards=cfg.num_dataset_shards_to_save,
+        )
     else:
         os.makedirs(prepared_ds_path, exist_ok=True)
-        dataset.save_to_disk(str(prepared_ds_path))
+        dataset.save_to_disk(
+            str(prepared_ds_path),
+            num_proc=num_workers,
+            max_shard_size=None,
+            num_shards=cfg.num_dataset_shards_to_save,
+        )
     if cfg.push_dataset_to_hub:
         LOG.info(
             "Pushing merged prepared dataset to Huggingface hub at "
@@ -460,13 +469,13 @@ def load_preprocessed_dataset(cfg: DictDefault, dataset_hash: str) -> Dataset |
     ):
         LOG.info(
             f"Loading prepared dataset from disk at {prepared_ds_path}...",
-            main_process_only=False,
+            main_process_only=True,
         )
         return load_from_disk(str(prepared_ds_path))
 
     LOG.info(
         f"Unable to find prepared dataset in {prepared_ds_path}",
-        main_process_only=False,
+        main_process_only=True,
     )
     return None
 

src/axolotl/utils/quantization.py

@@ -20,6 +20,7 @@ from torchao.quantization.quant_api import (
     UIntXWeightOnlyConfig,
     _is_linear,
 )
+from transformers import TorchAoConfig
 
 from axolotl.utils.schemas.enums import TorchIntDType
 
@@ -149,7 +150,9 @@ def quantize_model_for_ptq(
         group_size=group_size,
     )
     quantize_(model, linear_ptq_config)
+    quantization_config = TorchAoConfig(linear_ptq_config)
     if quantize_embedding:
+        quantization_config.include_input_output_embeddings = True
         embedding_quantize_config = get_ptq_config(
             weight_dtype=weight_dtype,
             activation_dtype=None,
@@ -160,6 +163,7 @@ def quantize_model_for_ptq(
             embedding_quantize_config,
             filter_fn=lambda m, _: isinstance(m, torch.nn.Embedding),
         )
+        model.config.quantization_config = quantization_config
 
 
 def convert_qat_model_for_ptq(

src/axolotl/utils/schemas/config.py

@@ -193,6 +193,12 @@ class AxolotlInputConfig(
         json_schema_extra={"description": "Index of shard to use for whole dataset"},
     )
     skip_prepare_dataset: bool | None = False
+    num_dataset_shards_to_save: int | None = Field(
+        default=None,
+        json_schema_extra={
+            "description": "Number of shards to save the prepared dataset"
+        },
+    )
 
     pretraining_dataset: (
         Annotated[list[PretrainingDataset | SFTDataset], MinLen(1)] | None
@@ -203,11 +209,12 @@ class AxolotlInputConfig(
         },
     )
     dataset_processes: int | None = Field(
-        default=min(
-            int(os.environ.get("AXOLOTL_DATASET_PROCESSES", 32)), os.cpu_count()
-        ),  # type: ignore[type-var]
+        default=None,
         json_schema_extra={
-            "description": "The maximum number of processes to use while preprocessing your input dataset. This defaults to `os.cpu_count()` if not set."
+            "description": (
+                "The maximum number of processes to use while preprocessing your input dataset. This defaults to `os.cpu_count()` if not set.\n"
+                "For Runpod VMs, it will default to number of vCPUs via RUNPOD_CPU_COUNT."
+            )
         },
     )
     dataset_exact_deduplication: bool | None = Field(
@@ -576,6 +583,13 @@ class AxolotlInputConfig(
         },
     )
 
+    tiled_mlp_use_original_mlp: bool | None = Field(
+        default=None,
+        json_schema_extra={
+            "description": "Whether to use original mlp for ALST tiled mlp. Otherwise uses a generic MLP based on llama."
+        },
+    )
+
     llama4_linearized_experts: bool | None = None
 
     deepspeed: str | dict[str, Any] | None = Field(
@@ -1192,3 +1206,16 @@ class AxolotlConfigWCapabilities(AxolotlInputConfig):
             data["dataloader_prefetch_factor"] = 256
 
         return data
+
+    @model_validator(mode="before")
+    @classmethod
+    def default_dataset_processes(cls, data):
+        if data.get("dataset_processes") is None:
+            if axolotl_dataset_processes := os.environ.get("AXOLOTL_DATASET_PROCESSES"):
+                data["dataset_processes"] = int(axolotl_dataset_processes)
+            elif runpod_cpu_count := os.environ.get("RUNPOD_CPU_COUNT"):
+                data["dataset_processes"] = int(runpod_cpu_count)
+            else:
+                data["dataset_processes"] = os.cpu_count()
+
+        return data

src/axolotl/utils/schemas/validation.py

@@ -1066,23 +1066,23 @@ class ModelCompatibilityValidationMixin:
             raise ValueError("gradient_checkpointing is not supported for MPT models")
         return self
 
-    @model_validator(mode="after")
-    def check_offload_grad_checkpointing(self):
-        if self.gradient_checkpointing and self.gradient_checkpointing == "unsloth":
-            LOG.warning(
-                "`unsloth` is deprecated for gradient_checkpointing, use `offload`"
-            )
-            self.gradient_checkpointing = "offload"
-        return self
-
     @model_validator(mode="after")
     def check_gradient_checkpointing_w_offload(self):
         if self.gradient_checkpointing == "offload":
             LOG.warning(
-                "`offload` is deprecated for gradient_checkpointing, use `activation_offloading: true`"
+                "`offload` is deprecated for gradient_checkpointing, use `activation_offloading: true` or `activation_offloading: legacy`"
             )
             self.gradient_checkpointing = True
-            self.activation_offloading = True
+            if self.adapter and "lora" in self.adapter:
+                LOG.warning(
+                    "offloading with CUDA streams is not supported for LoRA adapters, using the `activation_offloading: legacy` implementation."
+                )
+                self.activation_offloading = "legacy"
+            else:
+                LOG.warning(
+                    "`offload` uses a new stream implementation; to use the previous implementation, use `activation_offloading: legacy`"
+                )
+                self.activation_offloading = True
         if self.gradient_checkpointing == "offload_disk":
             LOG.warning(
                 "`offload_disk` is deprecated for gradient_checkpointing, use `activation_offloading: disk`"
@@ -1091,6 +1091,19 @@ class ModelCompatibilityValidationMixin:
             self.activation_offloading = "disk"
         return self
 
+    @model_validator(mode="after")
+    def check_activation_offloading_w_lora(self):
+        if (
+            self.activation_offloading is True
+            and self.adapter
+            and "lora" in self.adapter
+        ):
+            LOG.warning(
+                "activation_offloading with CUDA streams is not supported for LoRA adapters. Setting `activation_offloading: legacy`"
+            )
+            self.activation_offloading = "legacy"
+        return self
+
     @model_validator(mode="after")
     def check_activation_offloading_wo_gc(self):
         if self.activation_offloading and not self.gradient_checkpointing:

tests/utils/schemas/validation/test_activation_offloading.py

@@ -0,0 +1,91 @@
+"""Test for config validation for activation offloading."""
+
+from axolotl.utils.config import validate_config
+from axolotl.utils.dict import DictDefault
+
+
+class TestActivationOffloading:
+    """
+    Test cases for activation offloading schema validation
+    """
+
+    def test_gc_converts_offload_wo_lora(self, min_base_cfg):
+        cfg = (
+            DictDefault(
+                gradient_checkpointing="offload",
+            )
+            | min_base_cfg
+        )
+
+        cfg = validate_config(cfg)
+        assert cfg.gradient_checkpointing is True
+        assert cfg.activation_offloading is True
+
+    def test_gc_converts_offload_w_lora(self, min_base_cfg):
+        cfg = (
+            DictDefault(
+                gradient_checkpointing="offload",
+                adapter="lora",
+            )
+            | min_base_cfg
+        )
+
+        cfg = validate_config(cfg)
+        assert cfg.gradient_checkpointing is True
+        assert cfg.activation_offloading == "legacy"
+
+    def test_gc_converts_offload_w_qlora(self, min_base_cfg):
+        cfg = (
+            DictDefault(
+                gradient_checkpointing="offload",
+                adapter="qlora",
+                load_in_4bit=True,
+            )
+            | min_base_cfg
+        )
+
+        cfg = validate_config(cfg)
+        assert cfg.gradient_checkpointing is True
+        assert cfg.activation_offloading == "legacy"
+
+    def test_ac_impl_changes_w_lora(self, min_base_cfg):
+        cfg = (
+            DictDefault(
+                gradient_checkpointing=True,
+                activation_offloading=True,
+                adapter="lora",
+            )
+            | min_base_cfg
+        )
+
+        cfg = validate_config(cfg)
+        assert cfg.gradient_checkpointing is True
+        assert cfg.activation_offloading == "legacy"
+
+    def test_ac_impl_changes_w_qlora(self, min_base_cfg):
+        cfg = (
+            DictDefault(
+                gradient_checkpointing=True,
+                activation_offloading=True,
+                adapter="qlora",
+                load_in_4bit=True,
+            )
+            | min_base_cfg
+        )
+
+        cfg = validate_config(cfg)
+        assert cfg.gradient_checkpointing is True
+        assert cfg.activation_offloading == "legacy"
+
+    def test_ac_offload_impl_noop_wo_adapter(self, min_base_cfg):
+        cfg = (
+            DictDefault(
+                gradient_checkpointing=True,
+                activation_offloading=True,
+            )
+            | min_base_cfg
+        )
+
+        cfg = validate_config(cfg)
+        assert cfg.gradient_checkpointing is True
+        assert cfg.activation_offloading is True