!26900 fix matmul int8 bug

Merge pull request !26900 from yeyunpeng2020/quant_bak

mindspore/lite/src/runtime/kernel/arm/int8/matmul_base_int8.cc

@@ -116,7 +116,7 @@ int MatmulBaseInt8CPUKernel::Arm64SdotImpl(int task_id) {
   int32_t *cur_zp = filter_per_channel_ ? quant_param_->filter_zp_ + cur_stride : quant_param_->filter_zp_;
 
   MatmulInt8DpOpt(pack_a_ptr_, batch_b_ptr_ + cur_stride * param_->deep_align_, batch_c_ptr_ + cur_stride, param_->row_,
-                  cur_oc, param_->deep_align_, input_sums_, weight_bias_sums_ + cur_stride, quant_param_->out_act_min_,
+                  cur_oc, param_->deep_align_, input_sums_, batch_sums_ + cur_stride, quant_param_->out_act_min_,
                   quant_param_->out_act_max_, quant_param_->output_.zp_, cur_mul, cur_left, cur_right, param_->col_,
                   filter_per_channel_, cur_zp);
 
@@ -140,7 +140,7 @@ int MatmulBaseInt8CPUKernel::RunImpl(int task_id) {
   int32_t *cur_zp = filter_per_channel_ ? quant_param_->filter_zp_ + cur_stride : quant_param_->filter_zp_;
 
   MatmulInt8Opt(pack_a_ptr_, batch_b_ptr_ + cur_stride * param_->deep_align_, batch_c_ptr_ + cur_stride, param_->row_,
-                cur_oc, param_->deep_align_, input_sums_, weight_bias_sums_ + cur_stride, quant_param_->out_act_min_,
+                cur_oc, param_->deep_align_, input_sums_, batch_sums_ + cur_stride, quant_param_->out_act_min_,
                 quant_param_->out_act_max_, quant_param_->output_.zp_, cur_mul, cur_left, cur_right, param_->col_,
                 filter_per_channel_, cur_zp);
 

mindspore/lite/test/config/models_posttraining.cfg

@@ -1,6 +1,6 @@
-ml_face_mnet 105
+ml_face_mnet 64.6
-ml_face_landmark_2 2
+ml_face_landmark_2 0.6
-mobilenet.tflite 0.5
+mobilenet.tflite 0.4
-transformer_20200831_encoder_fp32.tflite;36 82.7
+transformer_20200831_encoder_fp32.tflite;36 73.5
-transformer_20200831_decoder_fp32.tflite;11 18.3
+transformer_20200831_decoder_fp32.tflite;11 15.8
-ml_face_mnet_image 105
+ml_face_mnet_image 54.1

mindspore/lite/test/config/ut_arm64.cfg

@@ -147,4 +147,4 @@ MindrtRuntimeTest.RuntimeFp16
 MixDataTypeTest.mix1
 SchedulerTest.TestScheduleInt32OpToFp16Subgraph
 TestGPURegistryCustomOp.TestGPUCustomAdd
-
+QuantCastInt8Test.*

mindspore/lite/tools/converter/quantizer/data_distribution.cc

@@ -176,14 +176,29 @@ double DataDistribution::CalculateScale(float min_value, float max_value) {
     min_value = -abs_max;
     max_value = abs_max;
   }
-  this->encode_min_ = min_value;
+
-  this->encode_max_ = max_value;
+  encode_min_ = min_value;
-  // Optimize Handle 0.
+  encode_max_ = max_value;
+  // Handling 0
+  // Inputs are strictly positive, set the real min to 0. e.g. input range = [1.0, 5.0] -> [0.0, 5.0]
+  if (encode_min_ > 0.0f) {
+    MS_LOG(DEBUG) << "min " << encode_min_ << " is bigger then 0, set to 0, this may course low precision";
+    encode_min_ = 0.0f;
+  }
+  // Inputs are strictly negative, set the real max to 0. e.g. input range = [-5.0, -1.0] -> [-5.0, 0.0]
+  if (encode_max_ < 0.0f) {
+    MS_LOG(DEBUG) << "real_max " << encode_max_ << " is smaller than 0, set to 0, this may course low precision";
+    encode_max_ = 0.0f;
+  }
+  // Inputs are both negative and positive, real_min and real_max are slightly shifted to make the floating point zero
+  // exactly representable. e.g. input range = [-5.1, 5.1] -> [-5.12, 5.08]
   MS_ASSERT(quant_max_ - quant_min_ > 0);
   return (encode_max_ - encode_min_) / (quant_max_ - quant_min_);
 }
 
-double DataDistribution::CalculateKLScale() { return CalculateScale(this->best_T_, this->real_max_); }
+double DataDistribution::CalculateKLScale() {
+  return CalculateScale(-std::abs(this->best_T_), std::abs(this->best_T_));
+}
 
 double DataDistribution::GetScale() {
   switch (this->activation_quant_method_) {

mindspore/lite/tools/converter/quantizer/data_distribution.h

@@ -36,7 +36,11 @@ class DataDistribution {
     this->quant_max_ = quant_max;
     this->quant_min_ = quant_min;
     std::fill(histogram_.begin(), histogram_.end(), 1.0e-7);
-    symmetry_ = symmetry;
+    if (this->activation_quant_method_ == KL) {
+      symmetry_ = true;
+    } else {
+      symmetry_ = symmetry;
+    }
   }
 
   int RecordMaxMinValueArray(const std::vector<float> &data);

mindspore/lite/tools/converter/quantizer/debug_info_manager.cc

@@ -471,6 +471,16 @@ KernelCallBack DebugInfoManager::GetAfterCallBack(const std::map<std::string, Op
       // all outputs are same dtype.
       for (size_t i = 0; i < outputs.size(); ++i) {
         auto tensor = outputs.at(i);
+        if (save_flag_ && !tensor->quant_params().empty()) {
+          QuantParamExtend quant_param;
+          quant_param.node_name = call_param.node_name;
+          quant_param.node_type = call_param.node_type;
+          quant_param.quant_params = tensor->quant_params();
+          quant_param.tensor_name = tensor->tensor_name();
+          quant_param.element_num = tensor->ElementsNum();
+          quant_param.dims = tensor->shape();
+          quant_params_.push_back(quant_param);
+        }
         AddOriginInfo(call_param, op_parameters.at(call_param.node_name), false, i,
                       static_cast<mindspore::lite::Tensor *>(tensor));
       }

mindspore/lite/tools/converter/quantizer/full_quant_quantizer.cc

@@ -495,8 +495,8 @@ int FullQuantQuantizer::UpdateDivergeInterval() {
 
 void FullQuantQuantizer::InitCpuConfig() {
   this->target_data_type_ = kNumberTypeInt8;
-  activation_symmetry_ = true;
+  activation_symmetry_ = false;
-  weight_symmetry_ = false;
+  weight_symmetry_ = true;
 }
 
 void FullQuantQuantizer::InitQMinMax() {

mindspore/lite/tools/converter/quantizer/quant_strategy.cc

@@ -123,9 +123,6 @@ bool QuantStrategy::CanOpFullQuantized(const AnfNodePtr &node) {
 }
 
 bool QuantStrategy::IsSkipOp(const AnfNodePtr &input_node) {
-  if (skip_node_.find(input_node->fullname_with_scope()) == skip_node_.end()) {
+  return !(skip_node_.find(input_node->fullname_with_scope()) == skip_node_.end());
-    return false;
-  }
-  return true;
 }
 }  // namespace mindspore::lite::quant