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Minor changes to align with TF Resnet code for MLPerf19 submission #285

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Minor changes to align with TF Resnet code for MLPerf19 submission #285

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11 changes: 7 additions & 4 deletions src/caffe/solvers/sgd_solver.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -125,9 +125,11 @@ Dtype SGDSolver<Dtype>::GetLearningRate() {
rate = this->param_.base_lr() *
pow(this->param_.gamma(), this->current_step_);
} else if (lr_policy == "poly") {
rate = this->param_.base_lr() * pow(Dtype(1.) -
(Dtype(this->iter_) / Dtype(this->param_.max_iter())),
this->param_.power());
float end_learning_rate = 0.0001;
rate = (this->param_.base_lr() - end_learning_rate) * pow(Dtype(1.) -
((Dtype(this->iter_) - Dtype(this->param_.warmup_iter())) /
(Dtype(this->param_.max_iter()) - Dtype(this->param_.warmup_iter()) + Dtype(1.))),
this->param_.power()) + end_learning_rate;
} else if (lr_policy == "sigmoid") {
rate = this->param_.base_lr() * (Dtype(1.) /
(Dtype(1.) + exp(-this->param_.gamma() * (Dtype(this->iter_) -
Expand Down Expand Up @@ -741,7 +743,8 @@ Dtype SGDSolver<Dtype>::GetLocalRate(int param_id) const {

float weight_decay = this->param_.weight_decay();
if (w_norm > 0.F && wgrad_norm > 0.F) {
rate = gw_ratio * w_norm / (wgrad_norm + weight_decay * w_norm);
float lars_epsilon = 0.00001;
rate = gw_ratio * w_norm / (wgrad_norm + weight_decay * w_norm + lars_epsilon);
}
if (local_lr > 0.F) {
local_lr = rate;
Expand Down