diff --git a/example/ck_tile/03_gemm/gemm_utils.hpp b/example/ck_tile/03_gemm/gemm_utils.hpp
old mode 100644
new mode 100755
index ed2006d4b9..876f643988
--- a/example/ck_tile/03_gemm/gemm_utils.hpp
+++ b/example/ck_tile/03_gemm/gemm_utils.hpp
@@ -280,8 +280,8 @@ struct GemmConfigPreshuffleDecode : public GemmConfigBase
 template <typename PrecType>
 struct GemmConfigPreshufflePrefill : public GemmConfigBase
 {
-    static constexpr ck_tile::index_t M_Tile = 128;
-    static constexpr ck_tile::index_t N_Tile = 128;
+    static constexpr ck_tile::index_t M_Tile = 64;
+    static constexpr ck_tile::index_t N_Tile = 256;
     static constexpr ck_tile::index_t K_Tile = 128 / sizeof(PrecType);
 
     static constexpr ck_tile::index_t M_Warp = 1;
diff --git a/example/ck_tile/03_gemm/gemm_weight_preshuffle.cpp b/example/ck_tile/03_gemm/gemm_weight_preshuffle.cpp
old mode 100644
new mode 100755
index 0018db2c99..0843dba0dd
--- a/example/ck_tile/03_gemm/gemm_weight_preshuffle.cpp
+++ b/example/ck_tile/03_gemm/gemm_weight_preshuffle.cpp
@@ -277,7 +277,7 @@ int main(int argc, char* argv[])
 
     try
     {
-        return !run_gemm_example<GemmConfigPreshuffleDecode>(arg_parser);
+        return !run_gemm_example<GemmConfigPreshufflePrefill>(arg_parser);
     }
     catch(const std::runtime_error& e)
     {