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Add FP16 support to ptq_evaluate.py and update README argument list #1174

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Feb 7, 2025
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Add FP16 support to ptq_evaluate.py and update README argument list #1174

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26412f8
Added FP16 support to ptq_evaluate.py and updated README
hkayann Feb 5, 2025
ebe901b
Renamed half to float16 for consistency
hkayann Feb 6, 2025
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81 changes: 58 additions & 23 deletions src/brevitas_examples/imagenet_classification/ptq/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -71,7 +71,7 @@ usage: ptq_evaluate.py [-h] --calibration-dir CALIBRATION_DIR --validation-dir
[--batch-size-validation BATCH_SIZE_VALIDATION]
[--export-dir EXPORT_DIR] [--gpu GPU]
[--calibration-samples CALIBRATION_SAMPLES]
[--model-name ARCH] [--dtype {float,bfloat16}]
[--model-name ARCH] [--dtype {float,bfloat16,float16}]
[--target-backend {fx,layerwise,flexml}]
[--scale-factor-type {float_scale,po2_scale}]
[--act-bit-width ACT_BIT_WIDTH]
Expand All @@ -82,13 +82,19 @@ usage: ptq_evaluate.py [-h] --calibration-dir CALIBRATION_DIR --validation-dir
[--weight-quant-type {sym,asym}]
[--weight-quant-granularity {per_tensor,per_channel,per_group}]
[--act-quant-granularity {per_tensor,per_group}]
[--weight-quant-calibration-type {stats,mse}]
[--weight-quant-calibration-type {stats,mse,hqo}]
[--act-equalization {fx,layerwise,None}]
[--act-quant-calibration-type {stats,mse}]
[--act-scale-computation-type {static,dynamic}]
[--graph-eq-iterations GRAPH_EQ_ITERATIONS]
[--learned-round {None,linear_round,hard_sigmoid_round,sigmoid_round}]
[--learned-round-block-name LEARNED_ROUND_BLOCK_NAME]
[--learned-round-loss {regularised_mse,mse}]
[--learned-round-mode {layerwise,blockwise}]
[--learned-round-iters LEARNED_ROUND_ITERS]
[--learned-round-lr-scheduler {None,linear}]
[--learned-round-lr LEARNED_ROUND_LR]
[--learned-round-batch-size LEARNED_ROUND_BATCH_SIZE]
[--act-quant-percentile ACT_QUANT_PERCENTILE]
[--export-onnx-qcdq] [--export-torch-qcdq]
[--bias-corr | --no-bias-corr]
Expand All @@ -102,22 +108,24 @@ usage: ptq_evaluate.py [-h] --calibration-dir CALIBRATION_DIR --validation-dir
[--weight-exponent-bit-width WEIGHT_EXPONENT_BIT_WIDTH]
[--act-mantissa-bit-width ACT_MANTISSA_BIT_WIDTH]
[--act-exponent-bit-width ACT_EXPONENT_BIT_WIDTH]
[--accumulator-bit-width ACCUMULATOR_BIT_WIDTH]
[--gpxq-accumulator-bit-width GPXQ_ACCUMULATOR_BIT_WIDTH]
[--gpxq-accumulator-tile-size GPXQ_ACCUMULATOR_TILE_SIZE]
[--onnx-opset-version ONNX_OPSET_VERSION]
[--channel-splitting-ratio CHANNEL_SPLITTING_RATIO]
[--compression-rate COMPRESSION_RATE]
[--gptq | --no-gptq] [--gpfq | --no-gpfq]
[--gpfa2q | --no-gpfa2q]
[--optimizer {adam,sign_sgd}] [--gptq | --no-gptq]
[--gpfq | --no-gpfq]
[--gpxq-act-order | --no-gpxq-act-order]
[--learned-round | --no-learned-round]
[--gptq-use-quant-activations | --no-gptq-use-quant-activations]
[--gpxq-create-weight-orig | --no-gpxq-create-weight-orig]
[--calibrate-bn | --no-calibrate-bn]
[--channel-splitting-split-input | --no-channel-splitting-split-input]
[--merge-bn | --no-merge-bn]
[--uint_sym_act_for_unsigned_values | --no-uint_sym_act_for_unsigned_values]
[--uint-sym-act-for-unsigned-values | --no-uint-sym-act-for-unsigned-values]
[--compile | --no-compile]

PyTorch ImageNet PTQ Validation

optional arguments:
options:
-h, --help show this help message and exit
--calibration-dir CALIBRATION_DIR
Path to folder containing Imagenet calibration folder
Expand Down Expand Up @@ -159,8 +167,9 @@ optional arguments:
vgg16 | vgg16_bn | vgg19 | vgg19_bn | vit_b_16 |
vit_b_32 | vit_h_14 | vit_l_16 | vit_l_32 |
wide_resnet101_2 | wide_resnet50_2 (default: resnet18)
--dtype {float,bfloat16}
Data type to use
--dtype {float,bfloat16,float16)
Data type to use (float for FP32, bfloat16 for BF16, or float16
for FP16)
--target-backend {fx,layerwise,flexml}
Backend to target for quantization (default: fx)
--scale-factor-type {float_scale,po2_scale}
Expand All @@ -182,7 +191,7 @@ optional arguments:
Weight quantization type (default: per_tensor)
--act-quant-granularity {per_tensor,per_group}
Activation quantization type (default: per_tensor)
--weight-quant-calibration-type {stats,mse}
--weight-quant-calibration-type {stats,mse,hqo}
Weight quantization calibration type (default: stats)
--act-equalization {fx,layerwise,None}
Activation equalization type (default: None)
Expand All @@ -195,11 +204,25 @@ optional arguments:
--graph-eq-iterations GRAPH_EQ_ITERATIONS
Numbers of iterations for graph equalization (default:
20)
--learned-round {None,linear_round,hard_sigmoid_round,sigmoid_round}
Learned round type (default: None)
--learned-round-block-name LEARNED_ROUND_BLOCK_NAME
Block name for learned round. It works only if FX is
not needed (default: layer\d+)
--learned-round-loss {regularised_mse,mse}
Learned round type (default: none)
--learned-round-mode {layerwise,blockwise}
Learned round mode (default: none)
--learned-round-iters LEARNED_ROUND_ITERS
Numbers of iterations for learned round for each layer
(default: 1000)
--learned-round-lr-scheduler {None,linear}
Learning rate scheduler for learned round (default:
None)
--learned-round-lr LEARNED_ROUND_LR
Learning rate for learned round (default: 1e-3)
--learned-round-batch-size LEARNED_ROUND_BATCH_SIZE
Learning rate for learned round (default: 1)
--act-quant-percentile ACT_QUANT_PERCENTILE
Percentile to use for stats of activation quantization
(default: 99.999)
Expand Down Expand Up @@ -243,26 +266,36 @@ optional arguments:
--act-exponent-bit-width ACT_EXPONENT_BIT_WIDTH
Exponent bit width used with float quantization for
activations (default: 3)
--accumulator-bit-width ACCUMULATOR_BIT_WIDTH
Accumulator Bit Width for GPFA2Q (default: None)
--gpxq-accumulator-bit-width GPXQ_ACCUMULATOR_BIT_WIDTH
Accumulator Bit Width for GPxQ (default: None)
--gpxq-accumulator-tile-size GPXQ_ACCUMULATOR_TILE_SIZE
Accumulator tile size for GPxQ (default: None)
--onnx-opset-version ONNX_OPSET_VERSION
ONNX opset version
--channel-splitting-ratio CHANNEL_SPLITTING_RATIO
Split Ratio for Channel Splitting. When set to 0.0,
Channel Splitting will not be applied. (default: 0.0)
--compression-rate COMPRESSION_RATE
Specify compression rate < 1.0 for random projection.
Default is 0.0 and does not use RP.
--optimizer {adam,sign_sgd}
Optimizer to use with learnable rounding (default:
adam)
--gptq Enable GPTQ (default: disabled)
--no-gptq Disable GPTQ (default: disabled)
--gpfq Enable GPFQ (default: disabled)
--no-gpfq Disable GPFQ (default: disabled)
--gpfa2q Enable GPFA2Q (default: disabled)
--no-gpfa2q Disable GPFA2Q (default: disabled)
--gpxq-act-order Enable GPxQ Act order heuristic (default: disabled)
--no-gpxq-act-order Disable GPxQ Act order heuristic (default: disabled)
--learned-round Enable Learned round (default: disabled)
--no-learned-round Disable Learned round (default: disabled)
--gptq-use-quant-activations
Enable Use quant activations for GPTQ (default:
disabled)
--no-gptq-use-quant-activations
Disable Use quant activations for GPTQ (default:
disabled)
--gpxq-create-weight-orig
Enable Maintain original weights for non-quant forward
pass (default: disabled)
--no-gpxq-create-weight-orig
Disable Maintain original weights for non-quant
forward pass (default: disabled)
--calibrate-bn Enable Calibrate BN (default: disabled)
--no-calibrate-bn Disable Calibrate BN (default: disabled)
--channel-splitting-split-input
Expand All @@ -275,12 +308,14 @@ optional arguments:
(default: enabled)
--no-merge-bn Disable Merge BN layers before quantizing the model
(default: enabled)
--uint_sym_act_for_unsigned_values
--uint-sym-act-for-unsigned-values
Enable Use unsigned act quant when possible (default:
enabled)
--no-uint_sym_act_for_unsigned_values
--no-uint-sym-act-for-unsigned-values
Disable Use unsigned act quant when possible (default:
enabled)
--compile Enable Use torch.compile (default: disabled)
--no-compile Disable Use torch.compile (default: disabled)
```

The script requires to specify the calibration folder (`--calibration-dir`), from which the calibration samples will be taken (configurable with the `--calibration-samples` argument), and a validation folder (`--validation-dir`).
Expand Down
5 changes: 4 additions & 1 deletion src/brevitas_examples/imagenet_classification/ptq/ptq_evaluate.py
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,10 @@ def validate_args(args):
choices=model_names,
help='model architecture: ' + ' | '.join(model_names) + ' (default: resnet18)')
parser.add_argument(
'--dtype', default='float', choices=['float', 'bfloat16'], help='Data type to use')
'--dtype',
default='float',
choices=['float', 'bfloat16', 'float16'],
help='Data type to use (float for FP32, bfloat16 for BF16, or float16 for FP16)')
parser.add_argument(
'--target-backend',
default='fx',
Expand Down
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