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import collections
import caffe2.python.hypothesis_test_util as hu
import hypothesis.strategies as st
import numpy as np
from caffe2.python import core, dyndep, utils, workspace
from caffe2.quantization.server import utils as dnnlowp_utils
from caffe2.quantization.server.dnnlowp_test_utils import (
check_quantized_results_close,
run_conv_or_fc
)
from hypothesis import assume, given, settings
dyndep.InitOpsLibrary("//caffe2/caffe2/quantization/server:dnnlowp_ops")
workspace.GlobalInit(
[
"caffe2",
"--caffe2_omp_num_threads=11",
# Increase this threshold to test acc16 with randomly generated data
"--caffe2_dnnlowp_acc16_density_threshold=0.5",
]
)
class DNNLowPOpConvAcc16OpTest(hu.HypothesisTestCase):
# correctness test with no quantization error in inputs
@given(
stride=st.integers(1, 2),
pad=st.integers(0, 2),
kernel=st.integers(1, 5),
dilation=st.integers(1, 2),
size=st.integers(10, 16),
group=st.integers(1, 4),
input_channels_per_group=st.sampled_from([2, 3, 4, 5, 8, 16, 32]),
output_channels_per_group=st.integers(2, 16),
batch_size=st.integers(0, 3),
order=st.sampled_from(["NCHW", "NHWC"]),
weight_quantized=st.booleans(),
share_col_buffer=st.booleans(),
preserve_activation_sparsity=st.booleans(),
preserve_weight_sparsity=st.booleans(),
**hu.gcs_cpu_only
)
@settings(deadline=10000)
def test_dnnlowp_conv_acc16_int(
self,
stride,
pad,
kernel,
dilation,
size,
group,
input_channels_per_group,
output_channels_per_group,
batch_size,
order,
weight_quantized,
share_col_buffer,
preserve_activation_sparsity,
preserve_weight_sparsity,
gc,
dc,
):
assume(group == 1 or dilation == 1)
assume(size >= dilation * (kernel - 1) + 1)
input_channels = input_channels_per_group * group
output_channels = output_channels_per_group * group
# X and W have scale 1, so exactly represented after quantization
# This was made sure by having at least one 0 and one 255 for unsigned
# 8-bit tensors, and at least one -128 and one 127 for signed 8-bit
# tensors.
# Since fbgemm_acc16 accumulates to 16-bit, To avoid overflow, we use
# small numbers except for those 0, 255, -128, and 127, for this test
# We also make sure 255, -128, or 127 are not multiplied together by
# putting them in different input channels and the corresponding input
# channel in other matrix is 0.
# For example, we put 255 in input channel 1 in X, so we make the
# corresponding input channel in W all zeros.
X_min = 0 if preserve_activation_sparsity else -77
X_max = X_min + 255
X = np.random.rand(batch_size, size, size, input_channels) * 4 + X_min
X = np.round(X).astype(np.float32)
X[..., 0] = X_min
if batch_size != 0:
X[0, 0, 0, 1] = X_max
if preserve_weight_sparsity:
W_min = -128
W_max = 100
else:
W_min = -100
W_max = W_min + 255
W = (
np.random.rand(output_channels, kernel, kernel, input_channels_per_group)
* 4
- 2
+ W_min
+ 128
)
W = np.round(W).astype(np.float32)
W[0, 0, 0, 0] = W_min
W[1, 0, 0, 0] = W_max
W[..., 1] = W_min + 128 # "zeros"
if order == "NCHW":
X = utils.NHWC2NCHW(X)
W = utils.NHWC2NCHW(W)
# No input quantization error in bias
b = np.round(np.random.randn(output_channels)).astype(np.float32)
Output = collections.namedtuple("Output", ["Y", "op_type", "engine", "order"])
outputs = []
op_engine_list = [
("Conv", ""),
("Conv", "DNNLOWP_ACC16"),
("Int8Conv", "DNNLOWP_ACC16"),
]
for op_type, engine in op_engine_list:
net = core.Net("test_net")
do_quantize = "DNNLOWP" in engine
do_dequantize = "DNNLOWP" in engine
do_quantize_weight = (
"DNNLOWP" in engine and weight_quantized and len(outputs) > 0
)
if do_quantize:
quantize = core.CreateOperator(
"Quantize",
["X"],
["X_q"],
preserve_activation_sparsity=preserve_activation_sparsity,
engine="DNNLOWP",
device_option=gc,
)
net.Proto().op.extend([quantize])
if do_quantize_weight:
int8_given_tensor_fill, w_q_param = dnnlowp_utils.create_int8_given_tensor_fill(
W, "W_q", preserve_weight_sparsity
)
net.Proto().op.extend([int8_given_tensor_fill])
# Bias
X_min = 0 if X.size == 0 else X.min()
X_max = 0 if X.size == 0 else X.max()
x_q_param = dnnlowp_utils.choose_quantization_params(
X_min, X_max, preserve_activation_sparsity
)
int8_bias_tensor_fill = dnnlowp_utils.create_int8_bias_tensor_fill(
b, "b_q", x_q_param, w_q_param
)
net.Proto().op.extend([int8_bias_tensor_fill])
conv = core.CreateOperator(
op_type,
[
"X_q" if do_quantize else "X",
"W_q" if do_quantize_weight else "W",
"b_q" if do_quantize_weight else "b",
],
["Y_q" if do_dequantize else "Y"],
stride=stride,
kernel=kernel,
dilation=dilation,
pad=pad,
order=order,
shared_buffer=(1 if share_col_buffer else 0),
preserve_activation_sparsity=preserve_activation_sparsity,
preserve_weight_sparsity=preserve_weight_sparsity,
engine=engine,
group=group,
device_option=gc,
)
if do_dequantize or do_quantize_weight:
# When quantized weight is provided, we can't rescale the
# output dynamically by looking at the range of output of each
# batch, so here we provide the range of output observed from
# fp32 reference implementation
dnnlowp_utils.add_quantization_param_args(
conv, outputs[0][0], preserve_activation_sparsity
)
net.Proto().op.extend([conv])
if do_dequantize:
dequantize = core.CreateOperator(
"Dequantize", ["Y_q"], ["Y"], engine="DNNLOWP", device_option=gc
)
net.Proto().op.extend([dequantize])
run_conv_or_fc(
self, None, net, X, W, b, op_type, engine, order, gc, outputs
)
check_quantized_results_close(outputs, symmetric=preserve_activation_sparsity)
@given(
stride=st.integers(1, 2),
pad=st.integers(0, 2),
kernel=st.integers(1, 5),
dilation=st.integers(1, 2),
size=st.integers(10, 16),
group=st.integers(1, 4),
input_channels_per_group=st.sampled_from([2, 3, 4, 5, 8, 16, 32]),
output_channels_per_group=st.integers(2, 16),
batch_size=st.integers(0, 3),
order=st.sampled_from(["NHWC"]),
weight_quantized=st.booleans(),
prepack_weight=st.booleans(),
nbits_in_non_outlier=st.sampled_from((0, 1, 6, 8)),
share_col_buffer=st.booleans(),
preserve_activation_sparsity=st.booleans(),
preserve_weight_sparsity=st.booleans(),
**hu.gcs_cpu_only
)
@settings(deadline=10000)
def test_dnnlowp_conv_acc16_outlier(
self,
stride,
pad,
kernel,
dilation,
size,
group,
input_channels_per_group,
output_channels_per_group,
batch_size,
order,
weight_quantized,
prepack_weight,
nbits_in_non_outlier,
share_col_buffer,
preserve_activation_sparsity,
preserve_weight_sparsity,
gc,
dc,
):
assume(group == 1 or dilation == 1)
assume(size >= dilation * (kernel - 1) + 1)
input_channels = input_channels_per_group * group
output_channels = output_channels_per_group * group
X_min = 0 if preserve_activation_sparsity else -77
X_max = X_min + 255
X = np.random.rand(batch_size, size, size, input_channels) * 4 + X_min
X = np.round(X).astype(np.float32)
X[..., 0] = X_min
if batch_size != 0:
X[0, 0, 0, 1] = X_max
if preserve_weight_sparsity:
W_min = -128
W_max = 100
else:
W_min = -100
W_max = W_min + 255
W = (
np.random.rand(output_channels, kernel, kernel, input_channels_per_group)
* 4
- 2
+ W_min
+ 128
)
W = np.round(W).astype(np.float32)
W[0, 0, 0, 0] = W_min
W[1, 0, 0, 0] = W_max
W[..., 1] = W_min + 128 # "zeros"
if order == "NCHW":
X = utils.NHWC2NCHW(X)
W = utils.NHWC2NCHW(W)
b = np.round(np.random.randn(output_channels)).astype(np.float32)
Output = collections.namedtuple("Output", ["Y", "op_type", "engine", "order"])
outputs = []
op_engine_list = [
("Conv", ""),
("Conv", "DNNLOWP_ACC16"),
("Int8Conv", "DNNLOWP_ACC16"),
]
for op_type, engine in op_engine_list:
init_net = core.Net("test_init_net")
net = core.Net("test_net")
do_quantize = "DNNLOWP" in engine
do_dequantize = "DNNLOWP" in engine
do_quantize_weight = "DNNLOWP" in engine and weight_quantized
do_prepack_weight = "DNNLOWP" in engine and prepack_weight
if do_quantize:
quantize = core.CreateOperator(
"Quantize",
["X"],
["X_q"],
preserve_activation_sparsity=preserve_activation_sparsity,
engine="DNNLOWP",
device_option=gc,
)
net.Proto().op.extend([quantize])
X_min = 0 if X.size == 0 else X.min()
X_max = 0 if X.size == 0 else X.max()
x_q_param = dnnlowp_utils.choose_quantization_params(
X_min, X_max, preserve_activation_sparsity
)
if do_quantize_weight:
int8_given_tensor_fill, w_q_param = dnnlowp_utils.create_int8_given_tensor_fill(
W, "W_q", preserve_weight_sparsity
)
init_net.Proto().op.extend([int8_given_tensor_fill])
# Bias
int8_bias_tensor_fill = dnnlowp_utils.create_int8_bias_tensor_fill(
b, "b_q", x_q_param, w_q_param
)
init_net.Proto().op.extend([int8_bias_tensor_fill])
if do_prepack_weight:
inputs = ["W_q" if do_quantize_weight else "W"]
if do_dequantize:
inputs += ["b_q" if do_quantize_weight else "b"]
pack = core.CreateOperator(
"Int8ConvPackWeight",
inputs,
["W_packed"],
stride=stride,
kernel=kernel,
dilation=dilation,
pad=pad,
nbits_in_non_outlier=nbits_in_non_outlier,
preserve_weight_sparsity=preserve_weight_sparsity,
engine=engine,
group=group,
in_scale=x_q_param.scale,
)
init_net.Proto().op.extend([pack])
conv = core.CreateOperator(
op_type,
[
"X_q" if do_quantize else "X",
"W_packed"
if do_prepack_weight
else ("W_q" if do_quantize_weight else "W"),
"b_q" if do_quantize_weight else "b",
],
["Y_q" if do_dequantize else "Y"],
stride=stride,
kernel=kernel,
dilation=dilation,
pad=pad,
order=order,
nbits_in_non_outlier=nbits_in_non_outlier,
shared_buffer=(1 if share_col_buffer else 0),
preserve_activation_sparsity=preserve_activation_sparsity,
preserve_weight_sparsity=preserve_weight_sparsity,
engine=engine,
group=group,
device_option=gc,
)
if do_dequantize or do_quantize_weight or do_prepack_weight:
# When quantized weight is provided, we can't rescale the
# output dynamically by looking at the range of output of each
# batch, so here we provide the range of output observed from
# fp32 reference implementation
dnnlowp_utils.add_quantization_param_args(
conv, outputs[0][0], preserve_activation_sparsity
)
net.Proto().op.extend([conv])
if do_dequantize:
dequantize = core.CreateOperator(
"Dequantize", ["Y_q"], ["Y"], engine="DNNLOWP", device_option=gc
)
net.Proto().op.extend([dequantize])
run_conv_or_fc(
self, init_net, net, X, W, b, op_type, engine, order, gc, outputs
)
check_quantized_results_close(outputs, symmetric=preserve_activation_sparsity)
|
