torch-mlir
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Compilation of Quantized Model Failed
Issue Description
I'm trying to compile the int8 quantized bert-large-uncased model and encountered the following error:
File "/XXX/py3.11/lib/python3.11/site-packages/torch_mlir/__init__.py", line 460, in compile
run_pipeline_with_repro_report(
File "/XXX/py3.11/lib/python3.11/site-packages/torch_mlir/compiler_utils.py", line 73, in run_pipeline_with_repro_report
raise TorchMlirCompilerError(trimmed_message) from None
torch_mlir.compiler_utils.TorchMlirCompilerError: Lowering TorchScript IR -> Torch Backend IR failed with the following diagnostics:
python exception: Failure while executing pass pipeline:
error: unknown: unsupported by backend contract: module initializers
note: unknown: see current operation: "torch.initialize.global_slots"(%161, %165, %169, %173, %179, %183, %189, %193, %197, %201, %207, %211, %217, %221, %225, %229, %235, %239, %245, %249, %253, %257, %263, %267, %273, %277, %281, %285, %291, %295, %301, %305, %309, %313, %319, %323, %329, %333, %337, %341, %347, %351, %357, %361, %365, %369, %375, %379, %385, %389, %393, %397, %403, %407, %413, %417, %421, %425, %431, %435, %441, %445, %449, %453, %459, %463, %469, %473, %477, %481, %487, %491, %497, %501, %505, %509, %515, %519, %525, %529, %533, %537, %543, %547, %553, %557, %561, %565, %571, %575, %581, %585, %589, %593, %599, %603, %609, %613, %617, %621, %627, %631, %637, %641, %645, %649, %655, %659, %665, %669, %673, %677, %683, %687, %693, %697, %701, %705, %711, %715, %721, %725, %729, %733, %739, %743, %749, %753, %757, %761, %767, %771, %777, %781, %785, %789, %795, %799, %805, %809, %813, %817, %823, %827, %834, %839) <{slotSymNames = 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@model.cls.predictions.transform.dense._packed_params._packed_params, @model.cls.predictions.decoder._packed_params._packed_params]}> : (!torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams, !torch.LinearParams) -> ()
note: unknown: this is likely due to InlineGlobalSlots being unable to inline a global slot
For Torch-MLIR developers, the error can be reproduced with:
$ torch-mlir-opt -pass-pipeline='builtin.module(torchscript-module-to-torch-backend-pipeline{backend-legal-ops=aten.flatten.using_ints,aten.adaptive_avg_pool1d extra-library=})' /tmp/HuggingFaceModel.mlir
Add '-mlir-print-ir-after-all -mlir-disable-threading' to get the IR dump for debugging purpose.
Any ideas?
Steps to Reproduce
Run the following python script:
import torch.nn
import torch_mlir
from transformers import BertTokenizer, BertForMaskedLM
from torch.quantization import quantize_dynamic
class HuggingFaceModel(torch.nn.Module):
def __init__(self, model_name, quant):
super().__init__()
self.model = BertForMaskedLM.from_pretrained(model_name)
if quant == "f16":
self.model.to(torch.half)
elif quant == "int8":
self.model = torch.quantization.quantize_dynamic(
self.model, # the model to quantize
{torch.nn.Linear}, # the types of layers to quantize
dtype=torch.qint8, # the data type to quantize to
)
self.model.eval()
def forward(self, inputs, attention):
return self.model(input_ids=inputs, attention_mask=attention).logits
pytorch_model = HuggingFaceModel("bert-large-uncased", "int8")
mlir_model = torch_mlir.compile(
pytorch_model,
[torch.tensor([[0 * 384]]), torch.tensor([[0 * 384]])], # not important for this issue
output_type=torch_mlir.OutputType.LINALG_ON_TENSORS,
use_tracing=True)
Attachments
HuggingFaceModel.mlir: https://gist.github.com/alexsifivetw/4a233ebe923aeb88451e4d701809e0e9
Another user using an old API that definitely will not work. Need to update docs. Discussing on discord.
