diff --git a/llvm/projects/hpvm-tensor-rt/opentuner/data/global_knobs.txt b/llvm/projects/hpvm-tensor-rt/opentuner/data/global_knobs.txt
index b68a78c831eecec11683354514d96b0effda30f1..84103fc103c4e1e4e7cdeec40bc61e2ea4852052 100644
--- a/llvm/projects/hpvm-tensor-rt/opentuner/data/global_knobs.txt
+++ b/llvm/projects/hpvm-tensor-rt/opentuner/data/global_knobs.txt
@@ -1,5 +1,5 @@
-fp32,11	0	1.0	tensorConvolution	tensorConvolution
-fp16,12	0	1.5     tensorConvolution	tensorHalfConvolution
+fp32,11	-1	1.0	tensorConvolution	tensorConvolution
+fp16,12	-1	1.5     tensorConvolution	tensorHalfConvolution
 perf,21 1,2,0	2.25    tensorConvolution	tensorConvPerfCuda
 perf,22 1,2,1   2.25    tensorConvolution	tensorConvPerfCuda
 perf,23 1,3,0	1.88	tensorConvolution	tensorConvPerfCuda