diff --git a/hpvm/projects/hpvm-tensor-rt/tensor_runtime/src/approx_knobs_utils.cc b/hpvm/projects/hpvm-tensor-rt/tensor_runtime/src/approx_knobs_utils.cc
index c5d79020acbaa6d7588577934dc222f679050ecf..1c9abe0497423c4bd20a8398bb29a33e12827533 100644
--- a/hpvm/projects/hpvm-tensor-rt/tensor_runtime/src/approx_knobs_utils.cc
+++ b/hpvm/projects/hpvm-tensor-rt/tensor_runtime/src/approx_knobs_utils.cc
@@ -23,7 +23,8 @@ PerfParams::PerfParams(int row1, int col1, int skip_offset1) {
 }
 
 PerfParamSet::PerfParamSet() {
-  printf("- knobs_file_path = %s \n", GLOBAL_KNOBS_FILE);
+
+  //printf("- knobs_file_path = %s \n", GLOBAL_KNOBS_FILE);
   std::ifstream file(GLOBAL_KNOBS_FILE);
 
   std::string line;
@@ -59,8 +60,8 @@ PerfParamSet::PerfParamSet() {
         std::getline(token_stream, tok, ',');
         int offset = atoi(tok.c_str());
 
-        printf("**** knob = %d, row = %d, col = %d, offset = %d \n\n", knob,
-               row, col, offset);
+        //printf("**** knob = %d, row = %d, col = %d, offset = %d \n\n", knob,
+        //       row, col, offset);
         PerfParams params(row, col, offset);
         perf_knob_map[knob] = params;
       }
@@ -92,7 +93,8 @@ SampParams::SampParams(int skip_rate1, int skip_offset1,
 }
 
 SampParamSet::SampParamSet() {
-  printf("- knobs_file_path = %s \n", GLOBAL_KNOBS_FILE);
+
+  //printf("- knobs_file_path = %s \n", GLOBAL_KNOBS_FILE);
   std::ifstream file(GLOBAL_KNOBS_FILE);
 
   std::string line;
@@ -114,7 +116,7 @@ SampParamSet::SampParamSet() {
         int index2 = token.find(",");
         std::string knob_str = token.substr(index2 + 1);
         int knob = atoi(knob_str.c_str());
-        printf("knob = %d \n", knob);
+        //printf("knob = %d \n", knob);
 
         std::getline(iss, token, '\t');
         std::istringstream token_stream(token);
@@ -130,7 +132,7 @@ SampParamSet::SampParamSet() {
         std::getline(token_stream, tok, ',');
         float interpolation_id = atof(tok.c_str());
 
-        printf("skip_every = %d, offset = %d \n", skip_every, offset);
+        //printf("skip_every = %d, offset = %d \n", skip_every, offset);
         SampParams params(skip_every, offset, interpolation_id);
         samp_knob_map[knob] = params;
       }