generate activation histogram and support entropy calibration

mace/core/net.cc

@@ -134,6 +134,7 @@ MaceStatus SerialNet::Run(RunMetadata *run_metadata) {
 
     if (EnvEnabled("MACE_LOG_TENSOR_RANGE") && device_type == CPU) {
       for (int i = 0; i < op->OutputSize(); ++i) {
+        if (op->debug_def().quantize_info_size() == 0) {
           int data_type = op->GetOptionalArg("T", static_cast<int>(DT_FLOAT));
           if (data_type == static_cast<int>(DT_FLOAT)) {
             float max_v = std::numeric_limits<float>::lowest();
@@ -147,6 +148,27 @@ MaceStatus SerialNet::Run(RunMetadata *run_metadata) {
             LOG(INFO) << "Tensor range @@" << op->debug_def().output(i)
                       << "@@" << min_v << "," << max_v;
           }
+        } else {
+          for (int ind = 0; ind < op->debug_def().quantize_info_size(); ++ind) {
+            float min_v = op->debug_def().quantize_info(ind).minval();
+            float max_v = op->debug_def().quantize_info(ind).maxval();
+            std::vector<int> bin_distribution(kBinSize, 0);
+            float bin_v = (max_v - min_v) / kBinSize;
+            Tensor::MappingGuard guard(op->Output(i));
+            const float *output_data = op->Output(i)->data<float>();
+            for (index_t j = 0; j < op->Output(i)->size(); ++j) {
+                int ind = static_cast<int>((output_data[j] - min_v) / bin_v);
+                if (ind < 0)
+                  ind = 0;
+                else if (ind > kBinSize-1)
+                  ind = kBinSize-1;
+                bin_distribution[ind]++;
+            }
+            LOG(INFO) << "Tensor range @@" << op->debug_def().output(i)
+                        << "@@" << min_v << "," << max_v<< "@@"
+                        << MakeString(bin_distribution);
+          }
+        }
       }
     }
   }

mace/core/net.h

@@ -18,8 +18,13 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <unordered_map>
+#include <sstream>
 
 #include "mace/core/operator.h"
+#include "mace/utils/string_util.h"
+
+#define kBinSize 2048
 
 namespace mace {
 

mace/python/tools/converter_tool/transformer.py

@@ -1797,9 +1797,6 @@ class Transformer(base_converter.ConverterInterface):
         return False
 
     def add_quantize_tensor_range(self):
-        if not self._option.quantize:
-            return False
-
         # Quantize info from range statistics
         print("Add quantize tensor range")
         range_file = self._option.quantize_range_file
@@ -1829,6 +1826,8 @@ class Transformer(base_converter.ConverterInterface):
                         self._quantize_activation_info[output]
                         for output in op.output])
 
+        if not self._option.quantize:
+            return False
         print ("Add default quantize info for ops like Pooling, Softmax")
         for op in self._model.op:
             if op.type in [MaceOp.Pooling.name,