diff --git a/benchmarks/cpp/g2s_copy/README.md b/benchmarks/cpp/g2s_copy/README.md
index a58638e..15b0e4f 100644
--- a/benchmarks/cpp/g2s_copy/README.md
+++ b/benchmarks/cpp/g2s_copy/README.md
@@ -1,11 +1,11 @@
 |Shape|Warp Layout|tilefusion(ms)|cutlass(ms)|Ratio|
 |:---|:---:|:---:|:---:|:---:|
-|RowMajor(64, 64)|(1, 1)|0.05042|0.05069|0.9947|
-|RowMajor(64, 64)|(2, 2)|0.05326|0.05095|1.045|
-|RowMajor(64, 64)|(2, 4)|0.07204|0.05219|1.38|
-|RowMajor(128, 128)|(1, 1)|0.1395|0.1541|0.9057|
-|RowMajor(128, 128)|(2, 2)|0.1352|0.134|1.009|
-|RowMajor(128, 128)|(2, 4)|0.1437|0.1383|1.039|
-|RowMajor(128, 256)|(1, 1)|0.2403|0.3694|0.6505|
-|RowMajor(128, 256)|(2, 2)|0.2468|0.2457|1.004|
-|RowMajor(128, 256)|(2, 4)|0.2529|0.2509|1.008|
+|RowMajor(64, 64)|(1, 1)|0.05039|0.0506|0.996|
+|RowMajor(64, 64)|(2, 2)|0.0531|0.05082|1.045|
+|RowMajor(64, 64)|(2, 4)|0.07193|0.05196|1.384|
+|RowMajor(128, 128)|(1, 1)|0.1396|0.1539|0.9074|
+|RowMajor(128, 128)|(2, 2)|0.1353|0.1339|1.01|
+|RowMajor(128, 128)|(2, 4)|0.1435|0.138|1.04|
+|RowMajor(128, 256)|(1, 1)|0.2402|0.3695|0.6501|
+|RowMajor(128, 256)|(2, 2)|0.2468|0.2462|1.002|
+|RowMajor(128, 256)|(2, 4)|0.2528|0.251|1.007|
diff --git a/benchmarks/cpp/g2s_copy/cutlass_copy.cuh b/benchmarks/cpp/g2s_copy/cutlass_copy.cuh
index a62e204..091d7e9 100644
--- a/benchmarks/cpp/g2s_copy/cutlass_copy.cuh
+++ b/benchmarks/cpp/g2s_copy/cutlass_copy.cuh
@@ -3,19 +3,18 @@
 
 #pragma once
 
-#include "cell/sync.hpp"
+#include "cutlass/copy.cuh"
 
 #include <cute/swizzle.hpp>
 #include <cute/tensor.hpp>
 
 using namespace cute;
-using namespace tilefusion::cell;
+using namespace benchmarks;
 
 namespace {
 // NOTE: The current implementation of Loader/Storer supports only
 // half-precision (FP16) RowMajor data tiles. It is not implemented for other
 // data types or memory layouts. Be cautious when using it for other cases.
-
 template <typename Element,                  //
           const int kRows, const int kCols,  //
           const int kWarpRows, const int kWarpCols>
@@ -132,7 +131,7 @@ __global__ void cutlass_g2s_data_transfer(const Element* src, Element* dst) {
     for (int k = 0; k < kRepeat; ++k) {
         loader(src, buf);
 
-        __copy_async();
+        cutlass_wrapper::__copy_async();
         __syncthreads();
 
         storer(buf, dst);
diff --git a/benchmarks/cpp/g2s_copy/tilefusion_copy.cuh b/benchmarks/cpp/g2s_copy/tilefusion_copy.cuh
index b652415..0fa31ac 100644
--- a/benchmarks/cpp/g2s_copy/tilefusion_copy.cuh
+++ b/benchmarks/cpp/g2s_copy/tilefusion_copy.cuh
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include "cell/sync.hpp"
+#include "cell/copy/sync.hpp"
 
 using namespace tilefusion::cell;
 
@@ -20,7 +20,7 @@ __global__ void g2s_data_transfer(const Element* src_ptr, Element* dst_ptr,
 
     for (int i = 0; i < kRepeat; ++i) {
         loader(src, inter);
-        __copy_async();
+        copy::__copy_async();
         __syncthreads();
 
         storer(inter, dst);
diff --git a/include/cell/copy/mod.hpp b/include/cell/copy/mod.hpp
index 0c24090..05f8727 100644
--- a/include/cell/copy/mod.hpp
+++ b/include/cell/copy/mod.hpp
@@ -9,5 +9,6 @@
 #include "cell/copy/global_to_shared.hpp"
 #include "cell/copy/register.hpp"
 #include "cell/copy/shared_to_register.hpp"
+#include "cell/copy/sync.hpp"
 #include "cell/copy/vectorize.hpp"
 #include "cell/copy/warp.hpp"
diff --git a/include/cell/sync.hpp b/include/cell/copy/sync.hpp
similarity index 73%
rename from include/cell/sync.hpp
rename to include/cell/copy/sync.hpp
index 7f0f8d5..4c4877a 100644
--- a/include/cell/sync.hpp
+++ b/include/cell/copy/sync.hpp
@@ -5,7 +5,7 @@
 
 #include "cuda_utils.hpp"
 
-namespace tilefusion::cell {
+namespace tilefusion::cell::copy {
 
 template <int N>
 DEVICE void wait_group() {
@@ -15,10 +15,8 @@ DEVICE void wait_group() {
 }
 
 DEVICE void commit_copy_group() {
-    // FIXME(ying): make the implementation cutlass-independent.
 #if defined(CP_ASYNC_SM80_ENABLED)
-
-    cute::cp_async_fence();
+    asm volatile("cp.async.commit_group;\n" ::);
 #endif
 }
 
@@ -26,4 +24,4 @@ DEVICE void __copy_async() {
     commit_copy_group();
     wait_group<0>();
 }
-}  // namespace tilefusion::cell
+}  // namespace tilefusion::cell::copy
diff --git a/include/cell/mod.hpp b/include/cell/mod.hpp
index ce76bd1..16ad831 100644
--- a/include/cell/mod.hpp
+++ b/include/cell/mod.hpp
@@ -5,7 +5,6 @@
 
 #include "cell/compute/mod.hpp"
 #include "cell/copy/mod.hpp"
-#include "cell/sync.hpp"
 #include "cell/warp.hpp"
 #include "traits/base.hpp"
 #include "types/mod.hpp"
diff --git a/tests/cpp/cell/test_g2s_load.cu b/tests/cpp/cell/test_g2s_load.cu
index 16a449c..06b4c66 100644
--- a/tests/cpp/cell/test_g2s_load.cu
+++ b/tests/cpp/cell/test_g2s_load.cu
@@ -25,7 +25,7 @@ __global__ void copy_g2s(const Element* src_ptr, Element* dst_ptr,
     SrcTile dst(dst_ptr);  // global memory tile
 
     loader(src, inter);
-    __copy_async();
+    copy::__copy_async();
     __syncthreads();
 
     storer(inter, dst);
diff --git a/tests/cpp/cell/test_swizzled_copy.cu b/tests/cpp/cell/test_swizzled_copy.cu
index 1db6703..511d612 100644
--- a/tests/cpp/cell/test_swizzled_copy.cu
+++ b/tests/cpp/cell/test_swizzled_copy.cu
@@ -2,7 +2,6 @@
 // Licensed under the MIT License.
 
 #include "cell/copy/mod.hpp"
-#include "cell/sync.hpp"
 #include "common/test_utils.hpp"
 #include "types/mod.hpp"