complete vmul jit kernel

paddle/fluid/operators/jitkernels/CMakeLists.txt

 
+# set(use_jit_file ${PADDLE_BINARY_DIR}/paddle/fluid/operators/jit/kernels.h)
+# file(WRITE ${pass_file} "// Generated by the paddle/fluid/framework/ir/CMakeLists.txt.  DO NOT EDIT!\n\n")
+# file(APPEND ${pass_file} "\#pragma once\n")
+# file(APPEND ${pass_file} "\#include \"paddle/fluid/framework/ir/pass.h\"\n")
+
+
 set(JIT_KERNEL_DEPS cpu_info cblas gflags enforce place)
 
 cc_library(jit_kernel_base SRCS kernels.cc DEPS ${JIT_KERNEL_DEPS})
 
-add_subdirectory(more)
 add_subdirectory(refer)
-
+add_subdirectory(more)
 if(WITH_XBYAK)
     add_subdirectory(jitcode)
 endif()
 
-# Debug
-message(STATUS "--------${JIT_KERNEL_DEPS}")
-
 cc_library(jit_kernel SRCS kernels.cc DEPS ${JIT_KERNEL_DEPS})
 cc_test(jit_kernel_test SRCS test.cc DEPS jit_kernel)

paddle/fluid/operators/jitkernels/README.md

 TBD
+
+# Use me
+Add USE_JIT_KERNEL(yourname) to CMakefile.

paddle/fluid/operators/jitkernels/jitcode/jitcode.cc

@@ -13,3 +13,26 @@
  * limitations under the License. */
 
 #include "paddle/fluid/operators/jitkernels/jitcode/jitcode.h"
+
+namespace paddle {
+namespace operators {
+namespace jitkernels {
+
+template <>
+size_t GetKey<int>(int d) {
+  return d;
+}
+
+// template <>
+// std::shared_ptr<const JitBase> CreateJitCode<KernelType::vmul, int>(int attr)
+// {
+//   if (UseJitCode<KernelType::vmul, int>(attr)) {
+//     return std::make_shared<jitcode::VMulJitCode<int>>(attr,
+//     CodeSize<KernelType::vmul, int>(attr)));
+//   }
+//   return nullptr;
+// }
+
+}  // namespace jitkernels
+}  // namespace operators
+}  // namespace paddle

paddle/fluid/operators/jitkernels/jitcode/jitcode.h

@@ -15,6 +15,7 @@
 #pragma once
 
 #include <type_traits>
+#include "paddle/fluid/operators/jitkernels/jitcode_base.h"
 #include "paddle/fluid/operators/jitkernels/kernels.h"
 
 #define XBYAK_USE_MMAP_ALLOCATOR
@@ -31,10 +32,10 @@ constexpr Xbyak::Operand::Code abi_param1(Xbyak::Operand::RDI),
     abi_param2(Xbyak::Operand::RSI), abi_param3(Xbyak::Operand::RDX),
     abi_param4(Xbyak::Operand::RCX), abi_not_param1(Xbyak::Operand::RCX);
 
-template <KernelType KT, typename Attr>
-class JitCode : public JitBase, public Xbyak::CodeGenerator {
+template <typename Attr>
+class VMulJitCode : public JitBase, public Xbyak::CodeGenerator {
  public:
-  JitCode(Attr attr, size_t code_size, void* code_ptr = nullptr)
+  VMulJitCode(Attr attr, size_t code_size, void* code_ptr = nullptr)
       : Xbyak::CodeGenerator(code_size, code_ptr) {
     this->genCode();
   }

paddle/fluid/operators/jitkernels/jitcode_base.h

@@ -15,6 +15,7 @@
 #pragma once
 
 #include <gflags/gflags.h>
+#include <memory>  // for shared_ptr
 #include "paddle/fluid/operators/jitkernels/kernel_base.h"
 #include "paddle/fluid/platform/macros.h"
 
@@ -42,11 +43,6 @@ bool UseJitCode(Attr attr) {
 template <typename Attr>
 size_t GetKey(Attr attr);
 
-template <>
-size_t GetKey<int>(int d) {
-  return d;
-}
-
 class JitBase {
  public:
   JitBase() = default;
@@ -68,6 +64,9 @@ class JitBase {
   void dumpCode(const unsigned char* code);
 };
 
+template <KernelType KT, typename Attr>
+std::shared_ptr<const JitBase> CreateJitCode(Attr attr);
+
 }  // namespace jitkernels
 }  // namespace operators
 }  // namespace paddle

paddle/fluid/operators/jitkernels/kernel_base.h

@@ -25,6 +25,7 @@ typedef enum { vmul = 0, vadd = 1, vsub, vexp } KernelType;
 class Kernel {
  public:
   Kernel() = default;
+  virtual ~Kernel() = default;
   DISABLE_COPY_AND_ASSIGN(Kernel);
 };
 
@@ -32,16 +33,20 @@ template <typename T, typename Func, typename Attr>  // TODO(TJ): use tuple
 class KernelImpl : public Kernel {
  public:
   using ELEMENT_TYPE = T;  // TODO(TJ): remove me?
-  KernelImpl() = default;
-  virtual ~KernelImpl() = default;
-
-  virtual Func GetFunc() { return func; }
+  virtual Func GetFunc() const { return func; }
   virtual bool UseMe(Attr attr) const = 0;
 
  protected:
   Func func{nullptr};
 };
 
+template <typename T, typename Func, typename Attr>  // TODO(TJ): use tuple
+class ReferKernel : public KernelImpl<T, Func, Attr> {
+ public:
+  // Refer code can always be used
+  bool UseMe(Attr attr) const override { return true; }
+};
+
 }  // namespace jitkernels
 }  // namespace operators
 }  // namespace paddle

paddle/fluid/operators/jitkernels/kernels.cc

@@ -21,13 +21,16 @@ namespace paddle {
 namespace operators {
 namespace jitkernels {
 
-// refer do not need useme, it would be the last one.
-
 KernelPool& KernelPool::Instance() {
   static KernelPool g_kernel_pool;
   return g_kernel_pool;
 }
 
+ReferKernelPool& ReferKernelPool::Instance() {
+  static ReferKernelPool g_refer_kernel_pool;
+  return g_refer_kernel_pool;
+}
+
 }  // namespace jitkernels
 }  // namespace operators
 }  // namespace paddle

paddle/fluid/operators/jitkernels/kernels.h

@@ -18,22 +18,21 @@
 #include <string>
 #include <unordered_map>
 #include <vector>
-
 #include "paddle/fluid/operators/jitkernels/jitcode_base.h"
 #include "paddle/fluid/operators/jitkernels/kernel_base.h"
 #include "paddle/fluid/operators/jitkernels/kernel_key.h"
-
-#ifdef PADDLE_WITH_XBYAK
-#include "paddle/fluid/operators/jitkernels/jitcode/jitcode.h"
-#endif
+#include "paddle/fluid/platform/place.h"
 
 namespace paddle {
 namespace operators {
 namespace jitkernels {
 
+// TODO(TJ): rename file to kernel_pool
+
 template <KernelType KT>
 class JitCodePool {
  public:
+  JitCodePool() = default;
   static JitCodePool& Instance() {
     static thread_local JitCodePool<KT> g_jit_codes;
     return g_jit_codes;
@@ -51,13 +50,11 @@ class JitCodePool {
   }
 
  private:
-  JitCodePool() = default;
   std::unordered_map<size_t, std::shared_ptr<const JitBase>> codes_;
-
   DISABLE_COPY_AND_ASSIGN(JitCodePool);
 };
 
-// std::tuple<T, Func, Attr>
+// TODO(TJ): std::tuple<T, Func, Attr>
 template <typename T, typename Func, typename Attr>
 struct KernelAttr {
   typedef T data_type;
@@ -65,76 +62,99 @@ struct KernelAttr {
   typedef Attr attr_type;
 };
 
+typedef std::unique_ptr<const Kernel> KernelPtr;
+typedef std::unordered_map<KernelKey, std::vector<KernelPtr>, KernelKey::Hash>
+    KernelMap;
+
 class KernelPool {
  public:
   static KernelPool& Instance();
-
-  typedef std::unique_ptr<const Kernel> KernelPtr;
-  typedef std::unordered_map<KernelKey, std::vector<KernelPtr>, KernelKey::Hash>
-      KernelMap;
+  KernelPool() = default;
   KernelMap& AllKernels() { return pool_; }
-
   void Insert(const KernelKey& key, KernelPtr value) {
     if (pool_.find(key) == pool_.end()) {
       pool_.emplace(key, std::vector<KernelPtr>());
     }
     pool_.at(key).emplace_back(std::move(value));
   }
-  KernelPool() = default;
 
  private:
   KernelMap pool_;
-
   DISABLE_COPY_AND_ASSIGN(KernelPool);
 };
 
-// TODO(TJ): create_jitcode;
+// Every kernel should have refer code and it should be used in unit tests,
+// so refer kernels should have it's independent kernel pool
+class ReferKernelPool {
+ public:
+  static ReferKernelPool& Instance();
+  ReferKernelPool() = default;
+  KernelMap& AllKernels() { return pool_; }
+  void Insert(const KernelKey& key, KernelPtr value) {
+    if (pool_.find(key) == pool_.end()) {
+      pool_.emplace(key, std::vector<KernelPtr>());
+    }
+    pool_.at(key).emplace_back(std::move(value));
+  }
+
+ private:
+  KernelMap pool_;
+  DISABLE_COPY_AND_ASSIGN(ReferKernelPool);
+};
+
+// Refer code do not related with attr, and always on CPUPlace
+template <KernelType KT, typename T, typename Func, typename Attr>
+inline Func GetRefer() {
+  auto& ref_pool = ReferKernelPool().Instance().AllKernels();
+  KernelKey kkey(KT, platform::CPUPlace());
+  auto ref_iter = ref_pool.find(kkey);
+  PADDLE_ENFORCE(ref_iter != ref_pool.end(),
+                 "Every Kernel should have reference function.");
+  auto& ref_impls = ref_iter->second;
+  for (auto& impl : ref_impls) {
+    auto i = dynamic_cast<const ReferKernel<T, Func, Attr>*>(impl.get());
+    if (i) {
+      return i->GetFunc();
+    }
+  }
+  return nullptr;
+}
 
 // TODO(TJ): make tuple? named KernelAttr
 template <KernelType KT, typename T, typename Func, typename Attr,
           typename PlaceType = platform::CPUPlace>
 Func Get(Attr attr) {
-  size_t key = GetKey<Attr>(attr);
-  auto jitcode = JitCodePool<KT>().Instance().Get(key);
-  if (jitcode) {
-    return jitcode->template getCode<Func>();
+  // size_t key = GetKey<Attr>(attr);
+  // auto jitcode = JitCodePool<KT>().Instance().Get(key);
+  // if (jitcode) {
+  //   return jitcode->template getCode<Func>();
+  // }
+
+  if (std::is_same<PlaceType, platform::CPUPlace>::value &&
+      std::is_same<T, float>::value) {  // TODO(TJ): float move to create
+    // auto p = CreateJitCode<KT, Attr>(attr);
+    // if (p) {
+    //   JitCodePool<KT>().Instance().Insert(key, p);
+    //   return p->template getCode<Func>();
+    // }
   }
 
-#ifdef PADDLE_WITH_XBYAK
-// // jitcode::JitCode is under protection of PADDLE_WITH_XBYAK
-// if (std::is_same<PlaceType, platform::CPUPlace>::value) {
-//   if (UseJitCode<KT, T, Attr>(attr)) {
-//     std::shared_ptr<JitBase> p(std::make_shared<jitcode::JitCode<KT, Attr>>(
-//         attr, CodeSize<KT, Attr>(attr)));
-//     JitCodePool<KT>().Instance().Insert(key, p);
-//     return p->getCode<Func>();
-//   }
-// }
-#endif
-
-  // (KernelKey(type, place), vector<Kernel>)
+  // pool: (KernelKey(type, place), vector<Kernel>)
   auto& pool = KernelPool().Instance().AllKernels();
   KernelKey kkey(KT, PlaceType());
   auto iter = pool.find(kkey);
   if (iter != pool.end()) {
-    auto impls = iter->second;
-    for (auto impl : impls) {
-      auto i = std::dynamic_pointer_cast<KernelImpl<T, Func, Attr>>(impl.get());
+    auto& impls = iter->second;
+    for (auto& impl : impls) {
+      auto i = dynamic_cast<const KernelImpl<T, Func, Attr>*>(impl.get());
       if (i && i->UseMe(attr)) {
         return i->GetFunc();
       }
     }
   }
 
-  // The last implementation should be reference function on CPU
-  // Every kernel should have refer code.
-
-  //  because of test refer should have it's own pool
-  // PADDLE_ENFORCE_GT(list.size(), 1) << "Should have refer implemtation";
-  // const auto& refer = KernelRefer<KT, T>().AllKernels();
-  // return refer.Get<Func>();
-
-  return nullptr;
+  // The last implementation should be reference function on CPUPlace.
+  return GetRefer<KT, T, Func, Attr>();
 }
 
 }  // namespace jitkernels

paddle/fluid/operators/jitkernels/refer/refer.cc

@@ -17,4 +17,5 @@
 
 namespace refer = paddle::operators::jitkernels::refer;
 
-// REGISTER_JITKERNEL_REFER(vmul, refer::VMul<float>, refer::VMul<double>);
+REGISTER_JITKERNEL_REFER(vmul, refer::VMulKernel<float>,
+                         refer::VMulKernel<double>);

paddle/fluid/operators/jitkernels/refer/refer.h

@@ -13,6 +13,7 @@
  * limitations under the License. */
 
 #pragma once
+#include "paddle/fluid/operators/jitkernels/kernel_base.h"
 #include "paddle/fluid/platform/enforce.h"
 
 namespace paddle {
@@ -27,6 +28,13 @@ void VMul(const T* x, const T* y, T* z, int n) {
   }
 }
 
+template <typename T>
+class VMulKernel
+    : public ReferKernel<T, void (*)(const T*, const T*, T*, int), int> {
+ public:
+  VMulKernel() { this->func = VMul<T>; }
+};
+
 }  // namespace refer
 }  // namespace jitkernels
 }  // namespace operators

paddle/fluid/operators/jitkernels/registry.h

@@ -20,6 +20,7 @@
 #include "paddle/fluid/operators/jitkernels/kernel_base.h"
 #include "paddle/fluid/operators/jitkernels/kernels.h"
 #include "paddle/fluid/platform/place.h"
+#include "paddle/fluid/platform/variant.h"  // for UNUSED
 
 namespace paddle {
 namespace operators {
@@ -32,37 +33,40 @@ inline std::unique_ptr<T> make_unique(Args&&... args) {
   return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
 }
 
-template <typename PlaceType, bool IsEnd, size_t I, typename... KernelImpls>
+template <typename Pool, typename PlaceType, bool IsEnd, size_t I,
+          typename... KernelImpls>
 struct JitKernelRegistrarFunctor;
 
-template <typename PlaceType, size_t I, typename... KernelImpls>
-struct JitKernelRegistrarFunctor<PlaceType, true, I, KernelImpls...> {
+template <typename Pool, typename PlaceType, size_t I, typename... KernelImpls>
+struct JitKernelRegistrarFunctor<Pool, PlaceType, true, I, KernelImpls...> {
   void operator()(KernelType kt) const {}
 };
 
-template <typename PlaceType, size_t I, typename... KernelImpls>
-struct JitKernelRegistrarFunctor<PlaceType, false, I, KernelImpls...> {
+template <typename Pool, typename PlaceType, size_t I, typename... KernelImpls>
+struct JitKernelRegistrarFunctor<Pool, PlaceType, false, I, KernelImpls...> {
   using KERNEL_IMPL_TYPE =
       typename std::tuple_element<I, std::tuple<KernelImpls...>>::type;
 
   void operator()(KernelType kt) const {
     KernelKey kkey(kt, PlaceType());
-    KernelPool().Instance().Insert(
-        kkey, std::move(make_unique<const KERNEL_IMPL_TYPE>()));
+    Pool().Instance().Insert(kkey,
+                             std::move(make_unique<const KERNEL_IMPL_TYPE>()));
     constexpr auto size = std::tuple_size<std::tuple<KernelImpls...>>::value;
-    JitKernelRegistrarFunctor<PlaceType, I + 1 == size, I + 1, KernelImpls...>
+    JitKernelRegistrarFunctor<Pool, PlaceType, I + 1 == size, I + 1,
+                              KernelImpls...>
         func;
     func(kt);
   }
 };
 
-template <typename PlaceType, typename... KernelImpls>
+template <typename Pool, typename PlaceType, typename... KernelImpls>
 class JitKernelRegistrar {
  public:
   explicit JitKernelRegistrar(KernelType kt) {
-    JitKernelRegistrarFunctor<PlaceType, false, 0, KernelImpls...> func;
+    JitKernelRegistrarFunctor<Pool, PlaceType, false, 0, KernelImpls...> func;
     func(kt);
   }
+  void Touch() {}
 };
 
 #define STATIC_ASSERT_JITKERNEL_GLOBAL_NAMESPACE(uniq_name, msg)              \
@@ -71,17 +75,40 @@ class JitKernelRegistrar {
                              __test_global_namespace_##uniq_name##__>::value, \
                 msg)
 
+// Refer always on CPUPlace
+#define REGISTER_JITKERNEL_REFER(kernel_type, ...)                   \
+  STATIC_ASSERT_JITKERNEL_GLOBAL_NAMESPACE(                          \
+      __reg_jitkernel_##kernel_type##_refer_CPUPlace,                \
+      "REGISTER_KERNEL_REFER must be called in global namespace");   \
+  static ::paddle::operators::jitkernels::JitKernelRegistrar<        \
+      ::paddle::operators::jitkernels::ReferKernelPool,              \
+      ::paddle::platform::CPUPlace, __VA_ARGS__>                     \
+      __jit_kernel_registrar_##kernel_type##_refer_CPUPlace_(        \
+          ::paddle::operators::jitkernels::KernelType::kernel_type); \
+  int TouchJitKernelReg_##kernel_type##_refer_CPUPlace_() {          \
+    __jit_kernel_registrar_##kernel_type##_refer_CPUPlace_.Touch();  \
+    return 0;                                                        \
+  }
+
 // kernel_type: should be in paddle::operators::jitkernels::KernelType
 // place_type: should be one of CPUPlace and GPUPlace in paddle::platform
 #define REGISTER_KERNEL_MORE(kernel_type, impl_type, place_type, ...)         \
   STATIC_ASSERT_JITKERNEL_GLOBAL_NAMESPACE(                                   \
       __reg_jitkernel_##kernel_type##_##impl_type##_##place_type,             \
       "REGISTER_KERNEL_MORE must be called in global namespace");             \
+  extern int TouchJitKernelReg_##kernel_type##_refer_CPUPlace_();             \
+  static int __assert_##kernel_type##_##impl_type##_##place_type##_has_refer_ \
+      UNUSED = TouchJitKernelReg_##kernel_type##_refer_CPUPlace_();           \
   static ::paddle::operators::jitkernels::JitKernelRegistrar<                 \
+      ::paddle::operators::jitkernels::KernelPool,                            \
       ::paddle::platform::place_type, __VA_ARGS__>                            \
-      __jit_kernel_registrar_##kernel_type##_##impl_type##_##place_type##__( \
-          ::paddle::operators::jitkernels::KernelType::kernel_type)
-// TODO(TJ): Add Touch and use me
+      __jit_kernel_registrar_##kernel_type##_##impl_type##_##place_type##_(   \
+          ::paddle::operators::jitkernels::KernelType::kernel_type);          \
+  int TouchJitKernelReg_##kernel_type##_##impl_type##_##place_type##_() {     \
+    __jit_kernel_registrar_##kernel_type##_##impl_type##_##place_type##_      \
+        .Touch();                                                             \
+    return 0;                                                                 \
+  }
 
 #define REGISTER_JITKERNEL_MORE(kernel_type, impl_type, ...) \
   REGISTER_KERNEL_MORE(kernel_type, impl_type, CPUPlace, __VA_ARGS__)
@@ -89,45 +116,28 @@ class JitKernelRegistrar {
 #define REGISTER_GPUKERNEL_MORE(kernel_type, impl_type, ...) \
   REGISTER_KERNEL_MORE(kernel_type, impl_type, GPUPlace, __VA_ARGS__)
 
-/*
-REGISTER_JITKERNEL_JITCODE(vmul, JitKernelCode<vmul, int>);
-
-// refer must be only one and at least one
-REGISTER_JITKERNEL_REFER(vmul, VMul);  // Refer need support dtype
+// REGISTER_JITKERNEL_JITCODE(vmul, JitKernelCode<vmul, int>);
 
-// you can register more implementations and the condition when use it
-REGISTER_JITKERNEL_MORE(vmul, mkl::VMUL<float>, UseMe<float>, mkl::VMUL<double>,
-                        UseMe<double>)
-
-#define STATIC_ASSERT_PASS_GLOBAL_NAMESPACE(uniq_name, msg)                   \
-  struct __test_global_namespace_##uniq_name##__ {};                          \
-  static_assert(std::is_same<::__test_global_namespace_##uniq_name##__,       \
-                             __test_global_namespace_##uniq_name##__>::value, \
-                msg)
+#define USE_JITKERNEL_REFER(kernel_type)                            \
+  STATIC_ASSERT_JITKERNEL_GLOBAL_NAMESPACE(                         \
+      __reg_jitkernel_##kernel_type##_refer_CPUPlace_,              \
+      "USE_JITKERNEL_REFER must be called in global namespace");    \
+  extern int TouchJitKernelReg_##kernel_type##_refer_CPUPlace_();   \
+  static int use_jitkernel_##kernel_type##_refer_CPUPlace_ UNUSED = \
+      TouchJitKernelReg_##kernel_type##_refer_CPUPlace_()
 
-// Register a new pass that can be applied on the IR.
-#define REGISTER_PASS(pass_type, pass_class)                 \
-  STATIC_ASSERT_PASS_GLOBAL_NAMESPACE(                       \
-      __reg_pass__##pass_type,                               \
-      "REGISTER_PASS must be called in global namespace");   \
-  static ::paddle::framework::ir::PassRegistrar<pass_class>  \
-      __pass_registrar_##pass_type##__(#pass_type);          \
-  int TouchPassRegistrar_##pass_type() {                     \
-    __pass_registrar_##pass_type##__.Touch();                \
-    return 0;                                                \
-  }                                                          \
-  static ::paddle::framework::ir::PassRegistrar<pass_class>& \
-      __pass_tmp_registrar_##pass_type##__ UNUSED =          \
-          __pass_registrar_##pass_type##__
-
-#define USE_PASS(pass_type)                           \
-  STATIC_ASSERT_PASS_GLOBAL_NAMESPACE(                \
-      __use_pass_itself_##pass_type,                  \
-      "USE_PASS must be called in global namespace"); \
-  extern int TouchPassRegistrar_##pass_type();        \
-  static int use_pass_itself_##pass_type##_ UNUSED =  \
-      TouchPassRegistrar_##pass_type()
-*/
+#define USE_KERNEL_MORE(kernel_type, impl_type, place_type)              \
+  STATIC_ASSERT_JITKERNEL_GLOBAL_NAMESPACE(                              \
+      __reg_jitkernel_##kernel_type##_##impl_type##_##place_type##_,     \
+      "USE_JITKERNEL_MORE must be called in global namespace");          \
+  extern int                                                             \
+      TouchJitKernelReg_##kernel_type##_##impl_type##_##place_type##_(); \
+  static int use_jitkernel_##kernel_type##_##impl_type##_##place_type##_ \
+      UNUSED =                                                           \
+          TouchJitKernelReg_##kernel_type##_##impl_type##_##place_type##_()
+
+#define USE_JITKERNEL_MORE(kernel_type, impl_type) \
+  USE_KERNEL_MORE(kernel_type, impl_type, CPUPlace)
 
 }  // namespace jitkernels
 }  // namespace operators

paddle/fluid/operators/jitkernels/test.cc

@@ -19,8 +19,11 @@
 #include "gflags/gflags.h"
 #include "glog/logging.h"
 #include "gtest/gtest.h"
-#include "paddle/fluid/operators/math/jit_kernel.h"
-#include "paddle/fluid/operators/math/jit_kernel_refer.h"
+#include "paddle/fluid/operators/jitkernels/kernels.h"
+// TODO(TJ): remove me
+#include "paddle/fluid/operators/jitkernels/registry.h"
+
+#include "paddle/fluid/platform/place.h"
 #include "paddle/fluid/platform/port.h"
 
 constexpr int repeat = 20000;
@@ -31,6 +34,75 @@ inline double GetCurrentUS() {
   return 1e+6 * time.tv_sec + time.tv_usec;
 }
 
-TEST(JitKernel, vmul) {}
+template <typename T>
+void RandomVec(const int n, T* a, const T lower = static_cast<T>(-20.f),
+               const T upper = static_cast<T>(20.f)) {
+  static unsigned int seed = 100;
+  std::mt19937 rng(seed++);
+  std::uniform_real_distribution<double> uniform_dist(0, 1);
+  for (int i = 0; i < n; ++i) {
+    a[i] = static_cast<T>(uniform_dist(rng) * (upper - lower) + lower);
+  }
+}
+
+template <typename T>
+void ExpectEQ(const T* target, const T* refer, int n) {
+  if (std::is_floating_point<T>::value) {
+    for (int i = 0; i < n; ++i) {
+      EXPECT_NEAR(target[i], refer[i], 1e-3);
+    }
+  } else {
+    for (int i = 0; i < n; ++i) {
+      EXPECT_EQ(target[i], refer[i]);
+    }
+  }
+}
+
+// TODO(TJ): remove me
+USE_JITKERNEL_MORE(vmul, mkl);
+USE_JITKERNEL_REFER(vmul);
+
+TEST(JitKernel, vmul) {
+  using T = float;
+  using PlaceType = paddle::platform::CPUPlace;
+
+  namespace jit = paddle::operators::jitkernels;
+  // TODO(TJ): test more vector size
+  for (int d = 1; d < 30; ++d) {
+    auto ref = jit::GetRefer<jit::vmul, T,
+                             void (*)(const T*, const T*, T*, int), int>();
+    auto tgt = jit::Get<jit::vmul, T, void (*)(const T*, const T*, T*, int),
+                        int, PlaceType>(d);
+    EXPECT_TRUE(ref != nullptr);
+    EXPECT_TRUE(tgt != nullptr);
+
+    std::vector<T> x(d), y(d);
+    std::vector<T> zref(d), ztgt(d);
+    RandomVec<T>(d, x.data());
+    RandomVec<T>(d, y.data());
+    const float* x_data = x.data();
+    const float* y_data = y.data();
+    float* ztgt_data = ztgt.data();
+    float* zref_data = zref.data();
+
+    tgt(x_data, y_data, ztgt_data, d);
+    ref(x_data, y_data, zref_data, d);
+    ExpectEQ<T>(ztgt_data, zref_data, d);
+
+    // test inplace x
+    std::copy(x.begin(), x.end(), zref.begin());
+    std::copy(x.begin(), x.end(), ztgt.begin());
+    tgt(ztgt_data, y_data, ztgt_data, d);
+    ref(zref_data, y_data, zref_data, d);
+    ExpectEQ<T>(ztgt_data, zref_data, d);
+
+    // test inplace y
+    std::copy(y.begin(), y.end(), zref.begin());
+    std::copy(y.begin(), y.end(), ztgt.begin());
+    tgt(x_data, ztgt_data, ztgt_data, d);
+    ref(x_data, zref_data, zref_data, d);
+    ExpectEQ<T>(ztgt_data, zref_data, d);
+  }
+}
 
 TEST(JitKernel, pool) {}