diff --git a/dnn/include/megdnn/common.h b/dnn/include/megdnn/common.h
index 13e39ced..aa23912f 100644
--- a/dnn/include/megdnn/common.h
+++ b/dnn/include/megdnn/common.h
@@ -24,5 +24,24 @@
 #define setenv(name,value,overwrite) _putenv_s(name,value)
 #endif
 
+namespace megdnn {
+
+/*!
+ * \brief whether there is an algorithm from algo_pack() that is available for
+ * current size
+ */
+template <class Opr, typename... Args>
+bool has_available_algo(Opr* opr, Args&&... args) {
+    const typename Opr::AlgoBase::SizeArgs size_args(
+            opr, std::forward<Args>(args)...);
+    for (auto i : Opr::algo_pack().all_algos) {
+        if (i->is_available(size_args)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+}
 
 // vim: syntax=cpp.doxygen foldmethod=marker foldmarker=f{{{,f}}}
diff --git a/dnn/src/common/algo_chooser.h b/dnn/src/common/algo_chooser.h
index 24a6c100..bc5dda09 100644
--- a/dnn/src/common/algo_chooser.h
+++ b/dnn/src/common/algo_chooser.h
@@ -16,6 +16,7 @@
 #include <utility>
 #include <vector>
 
+#include "megdnn/common.h"
 #include "utils.h"
 
 namespace megdnn {
@@ -75,21 +76,6 @@ std::vector<typename Opr::Algorithm*> get_all_algorithms(
 }
 
 /*!
- * \brief whether there is an algorithm from algo_pack() that is available for
- * current size
- */
-template <class Opr>
-bool has_available_algo(
-        const typename Opr::AlgoBase::SizeArgs& args) {
-    for (auto i : Opr::algo_pack().all_algos) {
-        if (i->is_available(args)) {
-            return true;
-        }
-    }
-    return false;
-}
-
-/*!
  * \brief a helper function to get an algorithm match attribute. If require a
  * algorithm with specified attribute, and the given algorithm match that
  * attribute, return the given algorithm. Otherwise return nullptr
diff --git a/dnn/src/cuda/conv_bias/conv_nchwqs8.cpp b/dnn/src/cuda/conv_bias/conv_nchwqs8.cpp
index adfa97ed..03c7aec4 100644
--- a/dnn/src/cuda/conv_bias/conv_nchwqs8.cpp
+++ b/dnn/src/cuda/conv_bias/conv_nchwqs8.cpp
@@ -134,13 +134,6 @@ bool ConvBiasForwardImpl::AlgoFallbackNCHWQS8::is_available(
 
     auto config = prepare_sub_opr(args);
 
-    AlgoBase::SizeArgs sub_args{
-            static_cast<ConvBiasForwardImpl*>(config.second.get()),
-            config.first[0],
-            config.first[1],
-            config.first[2],
-            config.first[3],
-            config.first[4]};
     bool is_relayout_ok = true;
     if (args.dst_layout->dtype.enumv() != DTypeEnum::Float32) {
         is_relayout_ok = relayout_format::RelayoutFormatFast::usable(
@@ -148,7 +141,11 @@ bool ConvBiasForwardImpl::AlgoFallbackNCHWQS8::is_available(
             RelayoutFormat::Param::Mode::NCHW4_NCHW);
     }
 
-    return is_relayout_ok && has_available_algo<ConvBiasForwardImpl>(sub_args);
+    return is_relayout_ok &&
+           has_available_algo<ConvBiasForwardImpl>(
+                   static_cast<ConvBiasForwardImpl*>(config.second.get()),
+                   config.first[0], config.first[1], config.first[2],
+                   config.first[3], config.first[4]);
 }
 
 WorkspaceBundle ConvBiasForwardImpl::AlgoFallbackNCHWQS8::get_workspace_bundle(
diff --git a/dnn/src/cuda/conv_bias/group_conv.cpp b/dnn/src/cuda/conv_bias/group_conv.cpp
index 65b7b6aa..51c78a74 100644
--- a/dnn/src/cuda/conv_bias/group_conv.cpp
+++ b/dnn/src/cuda/conv_bias/group_conv.cpp
@@ -107,16 +107,12 @@ bool ConvBiasForwardImpl::AlgoGroupConvGeneral::is_available(
     auto conv_args = args;
     conv_args.dst_layout = &dst_layout;
     auto config = prepare_sub_opr(conv_args);
-    AlgoBase::SizeArgs sub_args{
+
+    bool ret = has_available_algo<ConvBiasForwardImpl>(
             static_cast<ConvBiasForwardImpl*>(config.second.get()),
-            config.first[0],
-            config.first[1],
-            config.first[2],
-            config.first[3],
-            config.first[4]};
-
-    bool ret = has_available_algo<ConvBiasForwardImpl>(sub_args);
-    return  ret;
+            config.first[0], config.first[1], config.first[2], config.first[3],
+            config.first[4]);
+    return ret;
 }
 
 WorkspaceBundle ConvBiasForwardImpl::AlgoGroupConvGeneral::get_workspace_bundle(
diff --git a/dnn/src/cuda/convolution/backward_data/group_conv.cpp b/dnn/src/cuda/convolution/backward_data/group_conv.cpp
index 6bfdced6..a87b01ec 100644
--- a/dnn/src/cuda/convolution/backward_data/group_conv.cpp
+++ b/dnn/src/cuda/convolution/backward_data/group_conv.cpp
@@ -82,11 +82,10 @@ bool ConvolutionBackwardDataImpl::AlgoGroupConvGeneral::is_available(
     }
 
     auto config = prepare_sub_opr(args);
-    AlgoBase::SizeArgs sub_args{
-            static_cast<ConvolutionBackwardDataImpl*>(config.second.get()),
-            config.first[0], config.first[1], config.first[2]};
 
-    return has_available_algo<ConvolutionBackwardDataImpl>(sub_args);
+    return has_available_algo<ConvolutionBackwardDataImpl>(
+            static_cast<ConvolutionBackwardDataImpl*>(config.second.get()),
+            config.first[0], config.first[1], config.first[2]);
 }
 
 WorkspaceBundle
diff --git a/dnn/src/cuda/convolution/backward_filter/group_conv.cpp b/dnn/src/cuda/convolution/backward_filter/group_conv.cpp
index 8d80ae1e..548e54b4 100644
--- a/dnn/src/cuda/convolution/backward_filter/group_conv.cpp
+++ b/dnn/src/cuda/convolution/backward_filter/group_conv.cpp
@@ -78,11 +78,10 @@ bool ConvolutionBackwardFilterImpl::AlgoGroupConvGeneral::is_available(
     }
 
     auto config = prepare_sub_opr(args);
-    AlgoBase::SizeArgs sub_args{
-            static_cast<ConvolutionBackwardFilterImpl*>(config.second.get()),
-            config.first[0], config.first[1], config.first[2]};
 
-    return has_available_algo<ConvolutionBackwardFilterImpl>(sub_args);
+    return has_available_algo<ConvolutionBackwardFilterImpl>(
+            static_cast<ConvolutionBackwardFilterImpl*>(config.second.get()),
+            config.first[0], config.first[1], config.first[2]);
 }
 
 WorkspaceBundle
diff --git a/dnn/src/cuda/convolution3d/backward_data/group_conv.cpp b/dnn/src/cuda/convolution3d/backward_data/group_conv.cpp
index 73b673ac..d76da0f0 100644
--- a/dnn/src/cuda/convolution3d/backward_data/group_conv.cpp
+++ b/dnn/src/cuda/convolution3d/backward_data/group_conv.cpp
@@ -73,11 +73,10 @@ bool Convolution3DBackwardDataImpl::AlgoGroupConvGeneral::is_available(
     }
 
     auto config = prepare_sub_opr(args);
-    AlgoBase::SizeArgs sub_args{
-            static_cast<Convolution3DBackwardDataImpl*>(config.second.get()),
-            config.first[0], config.first[1], config.first[2]};
 
-    return has_available_algo<Convolution3DBackwardDataImpl>(sub_args);
+    return has_available_algo<Convolution3DBackwardDataImpl>(
+            static_cast<Convolution3DBackwardDataImpl*>(config.second.get()),
+            config.first[0], config.first[1], config.first[2]);
 }
 
 WorkspaceBundle
diff --git a/dnn/src/cuda/convolution3d/backward_filter/group_conv.cpp b/dnn/src/cuda/convolution3d/backward_filter/group_conv.cpp
index a0adc7bd..3875d922 100644
--- a/dnn/src/cuda/convolution3d/backward_filter/group_conv.cpp
+++ b/dnn/src/cuda/convolution3d/backward_filter/group_conv.cpp
@@ -77,11 +77,10 @@ bool Convolution3DBackwardFilterImpl::AlgoGroupConvGeneral::is_available(
     }
 
     auto config = prepare_sub_opr(args);
-    AlgoBase::SizeArgs sub_args{
-            static_cast<Convolution3DBackwardFilterImpl*>(config.second.get()),
-            config.first[0], config.first[1], config.first[2]};
 
-    return has_available_algo<Convolution3DBackwardFilterImpl>(sub_args);
+    return has_available_algo<Convolution3DBackwardFilterImpl>(
+            static_cast<Convolution3DBackwardFilterImpl*>(config.second.get()),
+            config.first[0], config.first[1], config.first[2]);
 }
 
 WorkspaceBundle
diff --git a/dnn/src/cuda/convolution3d/forward/group_conv.cpp b/dnn/src/cuda/convolution3d/forward/group_conv.cpp
index 1c702148..c8d65f9e 100644
--- a/dnn/src/cuda/convolution3d/forward/group_conv.cpp
+++ b/dnn/src/cuda/convolution3d/forward/group_conv.cpp
@@ -80,11 +80,10 @@ bool Convolution3DForwardImpl::AlgoGroupConvGeneral::is_available(
     }
 
     auto config = prepare_sub_opr(args);
-    AlgoBase::SizeArgs sub_args{
-            static_cast<Convolution3DForwardImpl*>(config.second.get()),
-            config.first[0], config.first[1], config.first[2]};
 
-    return has_available_algo<Convolution3DForwardImpl>(sub_args);
+    return has_available_algo<Convolution3DForwardImpl>(
+            static_cast<Convolution3DForwardImpl*>(config.second.get()),
+            config.first[0], config.first[1], config.first[2]);
 }
 
 WorkspaceBundle