def _contrib_adaptive_avg_pool2d(self, x_in, y_out, ydx, layer, threshold=0.1):
'''
Return the contributing synapses for a torch.nn.AdaptiveAveragePool layer
Parameters
----------
x_in : torch.Tensor
dimensions: batchsize,channels,height,width
y_out : torch.Tensor
dimensions: batchsize,channels,height,width
ydx : tuple
(channel,row,column) position of an output neuron
layer : list(str)
list containing single key in self.model.available_modules() dictionary
threshold : float
Returns
-------
neuron_counts
synapse_counts
synapse_weights
'''
neuron_counts = Counter()
synapse_counts = Counter()
synapse_weights = set()
avgpool = self.model.available_modules()[layer[0]]
'''Grab the dimensions used by an adaptive pooling layer'''
output_size = avgpool.output_size[0]
input_size = x_in.shape[-1]
stride = (input_size // output_size)
kernel_size = input_size - (output_size - 1) * stride
if len(ydx) == 1:
ch, i, j = get_index(ydx[0], kernel_size)
else:
ch, i, j = ydx
scalar = 1 / (kernel_size**2) # multiplier for computing average
goal = threshold * y_out[0, ch, i, j]
xmat = submatrix_generator(x_in, stride, kernel_size)(i, j)[ch]
ordsmat = sorted([(v * scalar, c) for c, v in enumerate(xmat.flatten()) if v != 0], key=lambda t: t[0], reverse=True)
if len(ordsmat) > 0:
cumsum = torch.cumsum(torch.Tensor([v[0] for v in ordsmat]), dim=0).detach()
assert np.allclose(cumsum[-1].detach().numpy(), y_out[0, ch, i, j].detach().numpy(), rtol=1e-04, atol=1e-4), f'avgpool failure: {cumsum[-1] - y_out[0,ch,i,j]}'
for idx, t in enumerate(cumsum):
if t > goal:
break
totalsum = cumsum[-1]
for v, c in ordsmat[:idx + 1]:
neuron = (ch, c // kernel_size + stride * i, c % kernel_size + stride * j)
neuron_counts.update([neuron])
synapse_counts.update([(neuron, ydx)])
weight = round(float((v / totalsum).detach().numpy()), 6)
synapse_weights.update([(neuron, ydx, weight)])
return neuron_counts, synapse_counts, synapse_weights
def _contrib_max2d(self, x_in, y_out, ydx, layer, threshold=None):
'''
Return the contributing synapse for a torch.nn.Max2D layer
Parameters
----------
x_in : torch.Tensor
dimensions: batchsize,channels,height,width
y_out : torch.Tensor
dimensions: batchsize,channels,height,width
ydx : tuple
(channel,row,column) position of an output neuron
layer : list(str)
list containing single key in self.model.available_modules() dictionary
threshold : None or float
not used, placeholder for uniformity in arguments.
Returns
-------
neuron_counts
synapse_counts
synapse_weights
'''
neuron_counts = Counter()
synapse_counts = Counter()
synapse_weights = set()
maxpool = self.model.available_modules()[layer[0]]
# Grab dimensions of maxpool from parameters
stride = maxpool.stride
kernel_size = maxpool.kernel_size
if len(ydx) == 1:
ch, i, j = get_index(ydx[0], kernel_size)
else:
ch, i, j = ydx
xmat = submatrix_generator(x_in, stride, kernel_size)(i, j)[ch]
c, v = max(list(enumerate(xmat.flatten())), key=lambda x: x[1])
assert np.allclose(
v.detach().numpy(),
y_out[0, ch, i, j].detach().numpy(),
rtol=1e-04,
atol=1e-4), f'maxpool failure: {v - y_out[0,ch,i,j]}'
neuron = (ch, c // kernel_size + stride * i,
c % kernel_size + stride * j)
neuron_counts.update([neuron])
synapse_counts.update([(neuron, ydx)])
synapse_weights.update([
(neuron, ydx, 1)
]) # 1 is just a placeholder since it is a direct contribution
return neuron_counts, synapse_counts, synapse_weights
def _contrib_conv2d(self, x_in, y_out, ydx, layers, threshold=0.1):
'''
Profile a single output neuron from a 2d conv layer
Pattern
-------
x_in : torch.tensor
dimensions: batchsize,channels,height,width
y_out : torch.Tensor
dimensions: batchsize,channels,height,width
ydx : tuple
(channel,row,column) 3d position of an output neuron
layers : list([str,str])
list containing keys in self.model.available_modules() dictionary
for conv2d these will refer to a convolutional module and an activation module
threshold : float
Returns
-------
neuron_counts
synapse_counts
synapse_weights
Note
----
Only implemented for convolution using filters with same height and width
and strides equal in both dimensions and padding equal in all dimensions
Synapse profiles for conv2d are indexed by 3 sets of tuples one for each neuron
and on one for the index of the filter used.
'''
neuron_counts = Counter()
synapse_counts = Counter()
synapse_weights = set()
conv, actf = layers
conv = self.model.available_modules()[conv]
actf = self.model.available_modules()[actf]
# assumption is that kernel size, stride are equal in both dimensions
# and padding preserves input size
kernel_size = conv.kernel_size[0]
stride = conv.stride[0]
padding = conv.padding[0]
W = conv._parameters['weight']
B = conv._parameters['bias']
if len(ydx) == 1:
d, i, j = get_index(ydx[0], kernel_size)
else:
d, i, j = ydx
# TODO make the lines below loop over a list of ydx positions
try:
y_true = y_out[0, d, i, j].detach().numpy()
except:
print(d, i, j)
goal = threshold * y_true
if goal <= 0:
warnings.warn(f'output neuron at position {ydx} is less than 0')
xmat = submatrix_generator(x_in, stride, kernel_size, padding=padding)(
i, j) # TODO generate sbmat before the loop
z = torch.mul(W[d], xmat)
ordsmat = sorted([(v, idx)
for idx, v in enumerate(z.flatten()) if v != 0],
key=lambda t: t[0],
reverse=True)
if len(ordsmat) > 0:
cumsum = torch.cumsum(torch.Tensor([v[0] for v in ordsmat]),
dim=0).detach() + B[d]
values = [actf(v) for v in cumsum]
assert np.allclose(
values[-1].detach().numpy(), y_true, rtol=1e-04, atol=1e-4
), f'conv2d failure: {values[-1].detach().numpy() - y_true}'
for idx, v in enumerate(values):
if v >= goal:
break
totalsum = cumsum[-1] - B[
d] # this is the sum of all the values before bias and activation
for v, jdx in ordsmat[:idx + 1]:
wdx = get_index(jdx, kernel_size)
neuron = tuple(
np.array(wdx, dtype=int) + np.array(
(0, stride * i - padding, stride * j - padding),
dtype=int)) # need the unpadded index
neuron_counts.update([
neuron
]) # this shows where the index was in original input
synapse_counts.update([(neuron, ydx, wdx)])
weight = round(float((v / totalsum).detach().numpy()), 6)
synapse_weights.update([(neuron, ydx, weight)])
return neuron_counts, synapse_counts, synapse_weights