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authorDeterminant <[email protected]>2015-06-20 20:00:25 +0800
committerDeterminant <[email protected]>2015-06-20 20:00:25 +0800
commitf3f4e74eb4dbb8829e5ee136ba4b0c0a7938b551 (patch)
tree8beb12182020267ce32904d646ad0c736c27dcd2 /layer
parent2ab9610a4fff798c1668cdc041515256fa813865 (diff)
change concept of ParamRepo; provide generalized param update; code clean-up; #25 #26 #27 #29
Diffstat (limited to 'layer')
-rw-r--r--layer/affine.lua75
-rw-r--r--layer/bias.lua2
-rw-r--r--layer/combiner.lua26
-rw-r--r--layer/init.lua12
-rw-r--r--layer/mse.lua28
-rw-r--r--layer/sigmoid.lua4
-rw-r--r--layer/softmax_ce.lua21
-rw-r--r--layer/window.lua2
8 files changed, 97 insertions, 73 deletions
diff --git a/layer/affine.lua b/layer/affine.lua
index 2cd7acb..00cbcfb 100644
--- a/layer/affine.lua
+++ b/layer/affine.lua
@@ -3,13 +3,35 @@ local LinearTransParam = nerv.class('nerv.LinearTransParam', 'nerv.MatrixParam')
local BiasParam = nerv.class('nerv.BiasParam', 'nerv.MatrixParam')
local AffineLayer = nerv.class('nerv.AffineLayer', 'nerv.Layer')
-function MatrixParam:read(pcdata)
+function MatrixParam:read(handle)
self.trans = self.gconf.cumat_type.new_from_host(
- nerv.MMatrixFloat.load(pcdata))
+ nerv.MMatrixFloat.load(handle))
end
-function MatrixParam:write(pfhandle)
- self.trans:new_to_host():save(pfhandle)
+function MatrixParam:write(handle)
+ self.trans:new_to_host():save(handle)
+end
+
+function MatrixParam:train_init()
+ self.correction = self.trans:create()
+ self.correction:fill(0)
+end
+
+function MatrixParam:update(gradient)
+ local gconf = self.gconf
+ self.correction:add(self.correction, gradient, gconf.momentum, 1.0)
+ -- momentum gain
+ local mmt_gain = 1.0 / (1.0 - gconf.momentum);
+ local n = self.gconf.batch_size * mmt_gain
+ -- perform update
+ self.trans:add(self.trans, self.correction, 1.0, -gconf.lrate / n)
+end
+
+function LinearTransParam:update(gradient)
+ MatrixParam.update(self, gradient)
+ local gconf = self.gconf
+ -- weight decay
+ self.trans:add(self.trans, self.trans, 1.0, -gconf.lrate * gconf.wcost)
end
function AffineLayer:__init(id, global_conf, layer_conf)
@@ -20,9 +42,10 @@ function AffineLayer:__init(id, global_conf, layer_conf)
self.dim_out = layer_conf.dim_out
self.gconf = global_conf
self:check_dim_len(1, 1) -- exactly one input and one output
+ self.direct_update = layer_conf.direct_update
end
-function AffineLayer:init()
+function AffineLayer:init(batch_size)
if self.ltp.trans:ncol() ~= self.bp.trans:ncol() then
nerv.error("mismatching dimensions of linear transform and bias paramter")
end
@@ -32,32 +55,24 @@ function AffineLayer:init()
if self.dim_out[1] ~= self.ltp.trans:ncol() then
nerv.error("mismatching dimensions of linear transform parameter and output")
end
-
- -- linear transform correction
- self.ltc = self.ltp.trans:create()
- self.ltc:fill(0)
- -- bias correction
- self.bc = self.bp.trans:create()
- self.bc:fill(0)
+ self.ltp_grad = self.ltp.trans:create()
+ self.ltp:train_init()
+ self.bp:train_init()
end
function AffineLayer:update(bp_err, input, output)
- local ltp = self.ltp.trans
- local bp = self.bp.trans
- local ltc = self.ltc
- local bc = self.bc
- local gconf = self.gconf
- -- momentum gain
- local mmt_gain = 1.0 / (1.0 - gconf.momentum);
- local n = input[1]:nrow() * mmt_gain
- -- update corrections (accumulated errors)
- ltc:mul(input[1], bp_err[1], 1.0, gconf.momentum, 'T', 'N')
- bc:add(bc, bp_err[1]:colsum(), gconf.momentum, 1.0)
- -- perform update
- ltp:add(ltp, ltc, 1.0, -gconf.lrate / n)
- bp:add(bp, bc, 1.0, -gconf.lrate / n)
- -- weight decay
- ltp:add(ltp, ltp, 1.0, -gconf.lrate * gconf.wcost)
+ if self.direct_update then
+ self.ltp.correction:mul(input[1], bp_err[1], 1.0, gconf.momentum, 'T', 'N')
+ -- momentum gain
+ local mmt_gain = 1.0 / (1.0 - gconf.momentum);
+ local n = self.gconf.batch_size * mmt_gain
+ -- perform update
+ self.ltp.trans:add(self.ltp.trans, self.ltp.correction, 1.0, -gconf.lrate / n)
+ else
+ self.ltp_grad:mul(input[1], bp_err[1], 1.0, 0.0, 'T', 'N')
+ self.ltp:update(self.ltp_grad)
+ end
+ self.bp:update(bp_err[1]:colsum())
end
function AffineLayer:propagate(input, output)
@@ -67,10 +82,10 @@ function AffineLayer:propagate(input, output)
output[1]:add_row(self.bp.trans, 1.0)
end
-function AffineLayer:back_propagate(next_bp_err, bp_err, input, output)
+function AffineLayer:back_propagate(bp_err, next_bp_err, input, output)
next_bp_err[1]:mul(bp_err[1], self.ltp.trans, 1.0, 0.0, 'N', 'T')
end
function AffineLayer:get_params()
- return {self.ltp, self.bp}
+ return nerv.ParamRepo({self.ltp, self.bp})
end
diff --git a/layer/bias.lua b/layer/bias.lua
index 8cd326b..c99274d 100644
--- a/layer/bias.lua
+++ b/layer/bias.lua
@@ -24,5 +24,5 @@ function BiasLayer:propagate(input, output)
end
function BiasLayer:get_params()
- return {self.bias}
+ return nerv.ParamRepo({self.bias})
end
diff --git a/layer/combiner.lua b/layer/combiner.lua
index 75e47e2..7bd7617 100644
--- a/layer/combiner.lua
+++ b/layer/combiner.lua
@@ -7,9 +7,15 @@ function CombinerLayer:__init(id, global_conf, layer_conf)
self.dim_out = layer_conf.dim_out
self.gconf = global_conf
self:check_dim_len(#self.lambda, -1)
+ if #self.dim_in < 1 then
+ nerv.error("no input specified")
+ end
+ if #self.dim_out < 1 then
+ nerv.error("no output specified")
+ end
end
-function CombinerLayer:init()
+function CombinerLayer:init(batch_size)
local dim = self.dim_in[1]
for i = 2, #self.dim_in do
if self.dim_in[i] ~= dim then
@@ -21,6 +27,7 @@ function CombinerLayer:init()
nerv.error("mismatching dimensions of inputs/outputs")
end
end
+ self.sum = self.gconf.cumat_type(batch_size, dim)
end
function CombinerLayer:update(bp_err, input, output)
@@ -32,24 +39,21 @@ function CombinerLayer:propagate(input, output)
output[1]:add(output[1], input[i], 1.0, self.lambda[i])
end
for i = 2, #self.dim_out do
- output[i]:copy_fromd(output[1])
+ output[i]:copy_fromd(output[1])
end
end
-function CombinerLayer:back_propagate(next_bp_err, bp_err, input, output)
- local sum = bp_err[1]:create()
- sum:fill(0)
- for i = 1, #self.dim_out do
+function CombinerLayer:back_propagate(bp_err, next_bp_err, input, output)
+ local sum = self.sum
+ sum:copy_fromd(bp_err[1])
+ for i = 2, #self.dim_out do
sum:add(sum, bp_err[i], 1.0, 1.0)
end
for i = 1, #self.dim_in do
- local scale = nerv.CuMatrixFloat(sum:nrow(), 1)
- scale:fill(self.lambda[i])
- next_bp_err[i]:copy_fromd(sum)
- next_bp_err[i]:scale_rows_by_col(scale)
+ next_bp_err[i]:add(next_bp_err[i], sum, 0.0, self.lambda[i])
end
end
function CombinerLayer:get_params()
- return {}
+ return nerv.ParamRepo({})
end
diff --git a/layer/init.lua b/layer/init.lua
index 169427d..e39af94 100644
--- a/layer/init.lua
+++ b/layer/init.lua
@@ -15,11 +15,15 @@ function Param:set_info(info)
self.info = info
end
-function Param:read(pfhandle)
+function Param:read(handle)
nerv.error_method_not_implemented()
end
-function Param:write(pfhandle)
+function Param:write(handle)
+ nerv.error_method_not_implemented()
+end
+
+function Param:update(gradient)
nerv.error_method_not_implemented()
end
@@ -29,7 +33,7 @@ function Layer:__init(id, global_conf, layer_conf)
nerv.error_method_not_implemented()
end
-function Layer:init()
+function Layer:init(batch_size)
nerv.error_method_not_implemented()
end
@@ -41,7 +45,7 @@ function Layer:propagate(input, output)
nerv.error_method_not_implemented()
end
-function Layer:back_propagate(next_bp_err, bp_err, input, output)
+function Layer:back_propagate(bp_err, next_bp_err, input, output)
nerv.error_method_not_implemented()
end
diff --git a/layer/mse.lua b/layer/mse.lua
index da5b24d..9a97add 100644
--- a/layer/mse.lua
+++ b/layer/mse.lua
@@ -8,12 +8,16 @@ function MSELayer:__init(id, global_conf, layer_conf)
self:check_dim_len(2, -1)
end
-function MSELayer:init()
+function MSELayer:init(batch_size)
if self.dim_in[1] ~= self.dim_in[2] then
nerv.error("mismatching dimensions of previous network output and labels")
end
+ self.scale = 1 / self.dim_in[1]
self.total_mse = 0.0
self.total_frames = 0
+ self.mse = self.gconf.cumat_type(batch_size, self.dim_in[1])
+ self.mse_sum = self.gconf.cumat_type(batch_size, 1)
+ self.diff = self.mse:create()
end
function MSELayer:update(bp_err, input, output)
@@ -21,32 +25,28 @@ function MSELayer:update(bp_err, input, output)
end
function MSELayer:propagate(input, output)
- local mse = input[1]:create()
+ local mse = self.mse
+ local mse_sum = self.mse_sum
mse:add(input[1], input[2], 1.0, -1.0)
- self.diff = mse:create()
self.diff:copy_fromd(mse)
mse:mul_elem(mse, mse)
- mse = mse:rowsum(mse)
- local scale = nerv.CuMatrixFloat(mse:nrow(), 1)
- scale:fill(1 / input[1]:ncol())
- mse:scale_rows_by_col(scale)
+ mse_sum:add(mse_sum, mse:rowsum(mse), 0.0, self.scale)
if output[1] ~= nil then
- output[1]:copy_fromd(mse)
+ output[1]:copy_fromd(mse_sum)
end
- self.total_mse = self.total_mse + mse:colsum()[0]
- self.total_frames = self.total_frames + mse:nrow()
+ self.total_mse = self.total_mse + mse_sum:colsum()[0]
+ self.total_frames = self.total_frames + mse_sum:nrow()
end
-- NOTE: must call propagate before back_propagate
-function MSELayer:back_propagate(next_bp_err, bp_err, input, output)
+function MSELayer:back_propagate(bp_err, next_bp_err, input, output)
local nbe = next_bp_err[1]
- nbe:copy_fromd(self.diff)
- self.diff = nil
+ nbe:add(nbe, self.diff, 0.0, 2 * self.scale)
if bp_err[1] ~= nil then
nbe:scale_rows_by_col(bp_err[1])
end
end
function MSELayer:get_params()
- return {}
+ return nerv.ParamRepo({})
end
diff --git a/layer/sigmoid.lua b/layer/sigmoid.lua
index dd10fb9..dfd09eb 100644
--- a/layer/sigmoid.lua
+++ b/layer/sigmoid.lua
@@ -22,10 +22,10 @@ function SigmoidLayer:propagate(input, output)
output[1]:sigmoid(input[1])
end
-function SigmoidLayer:back_propagate(next_bp_err, bp_err, input, output)
+function SigmoidLayer:back_propagate(bp_err, next_bp_err, input, output)
next_bp_err[1]:sigmoid_grad(bp_err[1], output[1])
end
function SigmoidLayer:get_params()
- return {}
+ return nerv.ParamRepo({})
end
diff --git a/layer/softmax_ce.lua b/layer/softmax_ce.lua
index 7888540..daf891e 100644
--- a/layer/softmax_ce.lua
+++ b/layer/softmax_ce.lua
@@ -12,13 +12,15 @@ function SoftmaxCELayer:__init(id, global_conf, layer_conf)
self:check_dim_len(2, -1) -- two inputs: nn output and label
end
-function SoftmaxCELayer:init()
+function SoftmaxCELayer:init(batch_size)
if not self.compressed and (self.dim_in[1] ~= self.dim_in[2]) then
nerv.error("mismatching dimensions of previous network output and labels")
end
self.total_ce = 0.0
self.total_correct = 0
self.total_frames = 0
+ self.softmax = self.gconf.cumat_type(batch_size, self.dim_in[1])
+ self.ce = self.softmax:create()
end
function SoftmaxCELayer:update(bp_err, input, output)
@@ -26,12 +28,11 @@ function SoftmaxCELayer:update(bp_err, input, output)
end
function SoftmaxCELayer:propagate(input, output)
- local soutput = input[1]:create() -- temporary value for calc softmax
- self.soutput = soutput
- local classified = soutput:softmax(input[1])
- local ce = soutput:create()
- ce:log_elem(soutput)
+ local softmax = self.softmax
+ local ce = self.ce
+ local classified = softmax:softmax(input[1])
local label = input[2]
+ ce:log_elem(softmax)
if self.compressed then
label = label:decompress(input[1]:ncol())
end
@@ -42,26 +43,26 @@ function SoftmaxCELayer:propagate(input, output)
end
-- add total ce
self.total_ce = self.total_ce - ce:colsum()[0]
- self.total_frames = self.total_frames + soutput:nrow()
+ self.total_frames = self.total_frames + softmax:nrow()
-- TODO: add colsame for uncompressed label
if self.compressed then
self.total_correct = self.total_correct + classified:colsame(input[2])[0]
end
end
-function SoftmaxCELayer:back_propagate(next_bp_err, bp_err, input, output)
+function SoftmaxCELayer:back_propagate(bp_err, next_bp_err, input, output)
-- softmax output - label
local label = input[2]
if self.compressed then
label = label:decompress(input[1]:ncol())
end
local nbe = next_bp_err[1]
- nbe:add(self.soutput, label, 1.0, -1.0)
+ nbe:add(self.softmax, label, 1.0, -1.0)
if bp_err[1] ~= nil then
nbe:scale_rows_by_col(bp_err[1])
end
end
function SoftmaxCELayer:get_params()
- return {}
+ return nerv.ParamRepo({})
end
diff --git a/layer/window.lua b/layer/window.lua
index 3a093f4..4e9a3b1 100644
--- a/layer/window.lua
+++ b/layer/window.lua
@@ -24,5 +24,5 @@ function WindowLayer:propagate(input, output)
end
function WindowLayer:get_params()
- return {self.window}
+ return nerv.ParamRepo({self.window})
end