From 664c5dd2f2d1c4ad177d5122df6ce3e2900c6648 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Sun, 22 Mar 2015 16:56:40 +0000
Subject: [PATCH] Subdivisions for batches
---
src/convolutional_layer.c | 14 ++++++--------
1 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/src/convolutional_layer.c b/src/convolutional_layer.c
index ad0d1c1..e20a41c 100644
--- a/src/convolutional_layer.c
+++ b/src/convolutional_layer.c
@@ -129,11 +129,10 @@
void backward_bias(float *bias_updates, float *delta, int batch, int n, int size)
{
- float alpha = 1./batch;
int i,b;
for(b = 0; b < batch; ++b){
for(i = 0; i < n; ++i){
- bias_updates[i] += alpha * sum_array(delta+size*(i+b*n), size);
+ bias_updates[i] += sum_array(delta+size*(i+b*n), size);
}
}
}
@@ -167,7 +166,6 @@
void backward_convolutional_layer(convolutional_layer layer, network_state state)
{
- float alpha = 1./layer.batch;
int i;
int m = layer.n;
int n = layer.size*layer.size*layer.c;
@@ -188,7 +186,7 @@
im2col_cpu(im, layer.c, layer.h, layer.w,
layer.size, layer.stride, layer.pad, b);
- gemm(0,1,m,n,k,alpha,a,k,b,k,1,c,n);
+ gemm(0,1,m,n,k,1,a,k,b,k,1,c,n);
if(state.delta){
a = layer.filters;
@@ -202,14 +200,14 @@
}
}
-void update_convolutional_layer(convolutional_layer layer, float learning_rate, float momentum, float decay)
+void update_convolutional_layer(convolutional_layer layer, int batch, float learning_rate, float momentum, float decay)
{
int size = layer.size*layer.size*layer.c*layer.n;
- axpy_cpu(layer.n, learning_rate, layer.bias_updates, 1, layer.biases, 1);
+ axpy_cpu(layer.n, learning_rate/batch, layer.bias_updates, 1, layer.biases, 1);
scal_cpu(layer.n, momentum, layer.bias_updates, 1);
- axpy_cpu(size, -decay, layer.filters, 1, layer.filter_updates, 1);
- axpy_cpu(size, learning_rate, layer.filter_updates, 1, layer.filters, 1);
+ axpy_cpu(size, -decay*batch, layer.filters, 1, layer.filter_updates, 1);
+ axpy_cpu(size, learning_rate/batch, layer.filter_updates, 1, layer.filters, 1);
scal_cpu(size, momentum, layer.filter_updates, 1);
}
--
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