diff --git a/extensions/csrc/common/dev_info_mgr.h b/extensions/csrc/common/dev_info_mgr.h
new file mode 100644
index 000000000..7570666ad
--- /dev/null
+++ b/extensions/csrc/common/dev_info_mgr.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <memory>
+
+#include "common/nvgpu_dev_info.h"
+#include "target.h"
+
+namespace colossalAI {
+namespace common {
+
+template <typename Ret>
+class DevInfoMgr final {
+ public:
+  static std::unique_ptr<Ret> GetDevInfo(int device_num) const {
+    return std::make_unique<Ret>(device_num);
+  }
+};
+
+}  // namespace common
+}  // namespace colossalAI
diff --git a/extensions/csrc/common/target.h b/extensions/csrc/common/target.h
new file mode 100644
index 000000000..1c8a508e3
--- /dev/null
+++ b/extensions/csrc/common/target.h
@@ -0,0 +1,134 @@
+#pragma once
+
+#include <exception>
+#include <iostream>
+#include <string>
+
+namespace colossalAI {
+namespace common {
+
+class Target {
+ public:
+  enum class OS : int {
+    Unk = -1,
+    Linux,
+    Windows,
+  };
+  enum class Arch : int {
+    Unk = -1,
+    X86,
+    Arm,
+    NVGPU,
+    AMDGPU,
+    Ascend,
+  };
+  enum class BitLen : int {
+    Unk = -1,
+    k32,
+    k64,
+  };
+
+  explicit Target(OS os, Arch arch, BitLen bitlen)
+      : os_(os), arch_(arch), bitlen_(bitlen) {}
+
+  bool defined() const {
+    return (os_ != OS::Unk) && (arch_ != Arch::Unk) && (bitlen_ != BitLen::Unk);
+  }
+
+  std::string str() const {
+    std::string s{"OS: "};
+    switch (os_) {
+      case OS::Unk:
+        s += "Unk";
+        break;
+      case OS::Linux:
+        s += "Linux";
+        break;
+      case OS::Windows:
+        s += "Windows";
+        break;
+      default:
+        throw std::invalid_argument("Invalid OS type!");
+    }
+    s += "\t";
+    s += "Arch: ";
+
+    switch (arch_) {
+      case Arch::Unk:
+        s += "Unk";
+        break;
+      case Arch::X86:
+        s += "X86";
+        break;
+      case Arch::Arm:
+        s += "Arm";
+        break;
+      case Arch::NVGPU:
+        s += "NVGPU";
+        break;
+      case Arch::AMDGPU:
+        s += "AMDGPU";
+        break;
+      case Arch::Ascend:
+        s += "Ascend";
+        break;
+      default:
+        throw std::invalid_argument("Invalid Arch type!");
+    }
+    s += "\t";
+    s += "BitLen: ";
+
+    switch (bitlen_) {
+      case BitLen::Unk:
+        s += "Unk";
+        break;
+      case BitLen::k32:
+        s += "k32";
+        break;
+      case BitLen::k64:
+        s += "k64";
+        break;
+      default:
+        throw std::invalid_argument("Invalid target bit length!");
+    }
+
+    return s;
+  }
+
+  OS os() const { return os_; }
+  Arch arch() const { return arch_; }
+  BitLen bitlen() const { return bitlen_; }
+
+  static Target DefaultX86Target();
+  static Target DefaultArmTarget();
+  static Target DefaultRocmTarget();
+  static Target DefaultAscendTarget();
+
+  static Target DefaultCUDATarget() {
+    return Target(OS::Linux, Arch::CUDA, BitLen::k64);
+  }
+
+  friend std::ostream& operator<<(std::ostream& os, const Target& target);
+  friend bool operator==(const Target& lhs, const Target& rhs);
+  friend bool operator!=(const Target& lhs, const Target& rhs);
+
+ private:
+  OS os_{OS::Unk};
+  Arch arch_{Arch::Unk};
+  BitLen bitlen_{BitLen::Unk};
+};
+
+std::ostream& operator<<(std::ostream& os, const Target& target) {
+  std::cout << target.str() << std::endl;
+}
+bool operator==(const Target& lhs, const Target& rhs) {
+  return (lhs.os_ == rhs.os_) && (lhs.arch_ == rhs.arch_) &&
+         (lhs.bitlen_ == rhs.bitlen_);
+}
+bool operator!=(const Target& lhs, const Target& rhs) {
+  return (lhs.os_ != rhs.os_) && (lhs.arch_ != rhs.arch_) &&
+         (lhs.bitlen_ != rhs.bitlen_);
+}
+
+}  // namespace common
+}  // namespace colossalAI
diff --git a/extensions/csrc/cuda/utils/gpu_launch_config.h b/extensions/csrc/cuda/utils/gpu_launch_config.h
new file mode 100644
index 000000000..c7481323a
--- /dev/null
+++ b/extensions/csrc/cuda/utils/gpu_launch_config.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include <cuda.h>
+#include <cuda_runtime.h>
+
+namespace colossalAI {
+namespace cuda {
+namespace utils {
+
+GPULaunchConfig GPUGetGPULaunchConfig1D(int64_t numel, int vec_size);
+
+// TODO(LiuYang): to be implemented
+GPULaunchConfig GPUGetGPULaunchConfig2D(int64_t numel, int vec_size);
+
+// TODO(LiuYang): to be implemented
+GPULaunchConfig GPUGetGPULaunchConfig3D(int64_t numel, int vec_size);
+
+class GPULaunchConfig {
+ public:
+  GPULaunchConfig(){};
+  GPULaunchConfig(const dim3& block, const dim3& grid)
+      : block_(block), grid_(grid) {}
+  friend GPULaunchConfig GPUGetGPULaunchConfig1D(int64_t numel, int vec_size);
+
+ protected:
+  void set_block(const dim3& dim) { block_ = dim; }
+  void set_grid(const dim3& dim) { grid_ = dim; }
+
+ private:
+  dim3 block_(1, 1, 1);
+  dim3 grid_(1, 1, 1);
+}
+
+}  // namespace utils
+}  // namespace cuda
+}  // namespace colossalAI
diff --git a/extensions/csrc/cuda/utils/micros.h b/extensions/csrc/cuda/utils/micros.h
new file mode 100644
index 000000000..9b410e3d8
--- /dev/null
+++ b/extensions/csrc/cuda/utils/micros.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <cuda.h>
+#include <cuda_runtime.h>
+
+#define CUDA_CHECK(func)                                           \
+  {                                                                \
+    auto status = func;                                            \
+    if (status != cudaSuccess) {                                   \
+      LOG(FATAL) << "CUDA Error : " << cudaGetErrorString(status); \
+    }                                                              \
+  }
diff --git a/extensions/csrc/cuda/utils/nvgpu_dev_info.cc b/extensions/csrc/cuda/utils/nvgpu_dev_info.cc
new file mode 100644
index 000000000..e52abebff
--- /dev/null
+++ b/extensions/csrc/cuda/utils/nvgpu_dev_info.cc
@@ -0,0 +1,45 @@
+#include "nvgpu_dev_info.h"
+
+#include <array>
+
+namespace colossalAI {
+namespace cuda {
+namespace utils {
+
+std::array<int, 3> NVGPUDevInfo::GetMaxGridDims() const {
+  std::array<int, 3> ret;
+  ret[0] = prop_->maxGridSize[0];
+  ret[1] = prop_->maxGridSize[1];
+  ret[2] = prop_->maxGridSize[2];
+  return ret;
+}
+
+std::array<int, 3> NVGPUDevInfo::GetMaxBlockDims() const {
+  std::array<int, 3> ret;
+  ret[0] = prop_->maxThreadsDim[0];
+  ret[1] = prop_->maxThreadsDim[1];
+  ret[2] = prop_->maxThreadsDim[2];
+  return ret;
+}
+
+std::array<int, 2> NVGPUDevInfo::GetCapability() const {
+  std::array<int, 2> ret;
+  ret[0] = prop_.major;
+  ret[1] = prop_.minor;
+}
+
+int NVGPUDevInfo::GetMultiProcessorCount() const {
+  return prop_->multiProcessorCount;
+}
+
+int NVGPUDevInfo::GetMaxThreadsPerMultiProcessor() const {
+  return prop_->maxThreadsPerMultiProcessor;
+}
+
+int NVGPUDevInfo::GetMaxThreadsPerBlock() const {
+  return prop_->maxThreadsPerBlock;
+}
+
+}  // namespace utils
+}  // namespace cuda
+}  // namespace colossalAI
diff --git a/extensions/csrc/cuda/utils/nvgpu_dev_info.h b/extensions/csrc/cuda/utils/nvgpu_dev_info.h
new file mode 100644
index 000000000..c8c67c908
--- /dev/null
+++ b/extensions/csrc/cuda/utils/nvgpu_dev_info.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <cuda.h>
+#include <cuda_runtime.h>
+
+#include <ostream>
+#include <string>
+#include <vector>
+
+#include "micros.h"
+#include "target.h"
+
+namespace colossalAI {
+namespace cuda {
+namespace utils {
+
+class NVGPUDevInfo {
+ public:
+  explicit NVGPUDevInfo(int device_num) : device_num_(device_num) {
+    CUDA_CALL(cudaGetDeviceProperties(prop_, device));
+  }
+
+  std::array<int, 3> GetMaxGridDims() const;
+  std::array<int, 3> GetMaxBlockDims() const;
+  std::array<int, 2> GetCapability() const;
+  int GetMultiProcessorCount() const;
+  int GetMaxThreadsPerMultiProcessor() const;
+  int GetMaxThreadsPerBlock() const;
+
+ private:
+  int device_num_;
+  cudaDeviceProp* prop_;
+};
+
+}  // namespace utils
+}  // namespace cuda
+}  // namespace colossalAI