[HICN-73] Performance improvements of interest/data transmission and reception at low level in the stack (portal.h)

Change-Id: I1525726f52040f1609e284bb9b995ea8794c5d5e
Signed-off-by: Mauro Sardara <msardara@cisco.com>

13 files changed, 333 insertions, 143 deletions

diff --git a/libtransport/src/hicn/transport/core/content_object.cc b/libtransport/src/hicn/transport/core/content_object.cc
index c00535512..df16923e9 100644
--- a/libtransport/src/hicn/transport/core/content_object.cc
+++ b/libtransport/src/hicn/transport/core/content_object.cc
@@ -81,6 +81,15 @@ ContentObject::ContentObject(ContentObject &&other) : Packet(std::move(other)) {
 
 ContentObject::~ContentObject() {}
 
+void ContentObject::replace(MemBufPtr &&buffer) {
+  Packet::replace(std::move(buffer));
+
+  if (hicn_data_get_name(format_, (hicn_header_t *)packet_start_,
+                         name_.getStructReference()) < 0) {
+    throw errors::RuntimeException("Error getting name from content object.");
+  }
+}
+
 const Name &ContentObject::getName() const {
   if (!name_) {
     if (hicn_data_get_name(format_, (hicn_header_t *)packet_start_,
@@ -94,7 +103,7 @@ const Name &ContentObject::getName() const {
 
 Name &ContentObject::getWritableName() { return const_cast<Name &>(getName()); }
 
-ContentObject &ContentObject::setName(const Name &name) {
+void ContentObject::setName(const Name &name) {
   if (hicn_data_set_name(format_, (hicn_header_t *)packet_start_,
                          name.getStructReference()) < 0) {
     throw errors::RuntimeException("Error setting content object name.");
@@ -104,8 +113,6 @@ ContentObject &ContentObject::setName(const Name &name) {
                          name_.getStructReference()) < 0) {
     throw errors::MalformedPacketException();
   }
-
-  return *this;
 }
 
 void ContentObject::setName(Name &&name) {
diff --git a/libtransport/src/hicn/transport/core/content_object.h b/libtransport/src/hicn/transport/core/content_object.h
index 8770e8cb4..fd531e8bc 100644
--- a/libtransport/src/hicn/transport/core/content_object.h
+++ b/libtransport/src/hicn/transport/core/content_object.h
@@ -46,13 +46,15 @@ class ContentObject : public Packet {
 
   ~ContentObject() override;
 
+  void replace(MemBufPtr &&buffer) override;
+
   const Name &getName() const override;
 
   Name &getWritableName() override;
 
-  ContentObject &setName(const Name &name);
+  void setName(const Name &name) override;
 
-  void setName(Name &&name);
+  void setName(Name &&name) override;
 
   uint32_t getPathLabel() const;
 
diff --git a/libtransport/src/hicn/transport/core/forwarder_interface.h b/libtransport/src/hicn/transport/core/forwarder_interface.h
index b3403cf5a..d470b6276 100644
--- a/libtransport/src/hicn/transport/core/forwarder_interface.h
+++ b/libtransport/src/hicn/transport/core/forwarder_interface.h
@@ -99,9 +99,6 @@ class ForwarderInterface {
       packet.setLocator(inet6_address_);
     }
 
-    // TRANSPORT_LOGI("Sending packet %s at %lu",
-    // packet.getName().toString().c_str(),
-    // utils::SteadyClock::now().time_since_epoch().count());
     packet.setChecksum();
     connector_.send(packet.data());
   }
diff --git a/libtransport/src/hicn/transport/core/interest.cc b/libtransport/src/hicn/transport/core/interest.cc
index 49d452d19..85f24bb25 100644
--- a/libtransport/src/hicn/transport/core/interest.cc
+++ b/libtransport/src/hicn/transport/core/interest.cc
@@ -68,6 +68,15 @@ Interest::Interest(Interest &&other_interest)
 
 Interest::~Interest() {}
 
+void Interest::replace(MemBufPtr &&buffer) {
+  Packet::replace(std::move(buffer));
+
+  if (hicn_interest_get_name(format_, (hicn_header_t *)packet_start_,
+                             name_.getStructReference()) < 0) {
+    throw errors::MalformedPacketException();
+  }
+}
+
 const Name &Interest::getName() const {
   if (!name_) {
     if (hicn_interest_get_name(format_, (hicn_header_t *)packet_start_,
@@ -81,7 +90,7 @@ const Name &Interest::getName() const {
 
 Name &Interest::getWritableName() { return const_cast<Name &>(getName()); }
 
-Interest &Interest::setName(const Name &name) {
+void Interest::setName(const Name &name) {
   if (hicn_interest_set_name(format_, (hicn_header_t *)packet_start_,
                              name.getStructReference()) < 0) {
     throw errors::RuntimeException("Error setting interest name.");
@@ -91,11 +100,9 @@ Interest &Interest::setName(const Name &name) {
                              name_.getStructReference()) < 0) {
     throw errors::MalformedPacketException();
   }
-
-  return *this;
 }
 
-Interest &Interest::setName(Name &&name) {
+void Interest::setName(Name &&name) {
   if (hicn_interest_set_name(format_, (hicn_header_t *)packet_start_,
                              name.getStructReference()) < 0) {
     throw errors::RuntimeException("Error setting interest name.");
@@ -105,8 +112,6 @@ Interest &Interest::setName(Name &&name) {
                              name_.getStructReference()) < 0) {
     throw errors::MalformedPacketException();
   }
-
-  return *this;
 }
 
 void Interest::setLocator(const ip_address_t &ip_address) {
diff --git a/libtransport/src/hicn/transport/core/interest.h b/libtransport/src/hicn/transport/core/interest.h
index 95b45ac9a..74979d8d0 100644
--- a/libtransport/src/hicn/transport/core/interest.h
+++ b/libtransport/src/hicn/transport/core/interest.h
@@ -45,13 +45,15 @@ class Interest
 
   ~Interest() override;
 
+  void replace(MemBufPtr &&buffer) override;
+
   const Name &getName() const override;
 
   Name &getWritableName() override;
 
-  Interest &setName(const Name &name);
+  void setName(const Name &name) override;
 
-  Interest &setName(Name &&name);
+  void setName(Name &&name) override;
 
   void setLocator(const ip_address_t &ip_address) override;
 
diff --git a/libtransport/src/hicn/transport/core/memif_connector.cc b/libtransport/src/hicn/transport/core/memif_connector.cc
index a4756d136..863e1aa20 100644
--- a/libtransport/src/hicn/transport/core/memif_connector.cc
+++ b/libtransport/src/hicn/transport/core/memif_connector.cc
@@ -377,9 +377,6 @@ int MemifConnector::onInterrupt(memif_conn_handle_t conn, void *private_ctx,
       }
     }
 
-    connector->io_service_.post(
-        std::bind(&MemifConnector::processInputBuffer, connector));
-
     /* mark memif buffers and shared memory buffers as free */
     /* free processed buffers */
 
@@ -399,6 +396,9 @@ int MemifConnector::onInterrupt(memif_conn_handle_t conn, void *private_ctx,
     //    }
   } while (ret_val == MEMIF_ERR_NOBUF);
 
+  connector->io_service_.post(
+      std::bind(&MemifConnector::processInputBuffer, connector));
+
   return 0;
 
 error:
diff --git a/libtransport/src/hicn/transport/core/memif_connector.h b/libtransport/src/hicn/transport/core/memif_connector.h
index 06a8fd73e..609571389 100644
--- a/libtransport/src/hicn/transport/core/memif_connector.h
+++ b/libtransport/src/hicn/transport/core/memif_connector.h
@@ -41,9 +41,9 @@ typedef struct memif_connection memif_connection_t;
 #define APP_NAME "libtransport"
 #define IF_NAME "vpp_connection"
 
-#define MAX_MEMIF_BUFS 1024
 #define MEMIF_BUF_SIZE 2048
 #define MEMIF_LOG2_RING_SIZE 11
+#define MAX_MEMIF_BUFS (1 << MEMIF_LOG2_RING_SIZE)
 
 class MemifConnector : public Connector {
   typedef void *memif_conn_handle_t;
diff --git a/libtransport/src/hicn/transport/core/packet.cc b/libtransport/src/hicn/transport/core/packet.cc
index ec99bb3f7..d925375ce 100644
--- a/libtransport/src/hicn/transport/core/packet.cc
+++ b/libtransport/src/hicn/transport/core/packet.cc
@@ -50,30 +50,7 @@ Packet::Packet(MemBufPtr &&buffer)
       packet_start_(packet_->writableData()),
       header_head_(packet_.get()),
       payload_head_(nullptr),
-      format_(getFormatFromBuffer(packet_start_)) {
-  int signature_size = 0;
-
-  if (_is_ah(format_)) {
-    signature_size = (uint32_t)getSignatureSize();
-  }
-
-  auto header_size = getHeaderSizeFromFormat(format_, signature_size);
-  auto payload_length = packet_->length() - header_size;
-  if (!payload_length) {
-    return;
-  }
-
-  packet_->trimEnd(packet_->length());
-
-  if (payload_length) {
-    auto payload = packet_->cloneOne();
-    payload_head_ = payload.get();
-    payload_head_->advance(header_size);
-    payload_head_->append(payload_length);
-    packet_->prependChain(std::move(payload));
-    packet_->append(header_size);
-  }
-}
+      format_(getFormatFromBuffer(packet_start_)) {}
 
 Packet::Packet(const uint8_t *buffer, std::size_t size)
     : Packet(MemBufPtr(utils::MemBuf::copyBuffer(buffer, size).release())) {}
@@ -145,6 +122,14 @@ std::size_t Packet::getPayloadSizeFromBuffer(Format format,
   return payload_length;
 }
 
+void Packet::replace(MemBufPtr &&buffer) {
+  packet_ = std::move(buffer);
+  packet_start_ = packet_->writableData();
+  header_head_ = packet_.get();
+  payload_head_ = nullptr;
+  format_ = getFormatFromBuffer(packet_start_);
+}
+
 std::size_t Packet::payloadSize() const {
   return getPayloadSizeFromBuffer(format_, packet_start_);
 }
@@ -173,6 +158,8 @@ uint32_t Packet::getLifetime() const {
 }
 
 Packet &Packet::appendPayload(std::unique_ptr<utils::MemBuf> &&payload) {
+  separateHeaderPayload();
+
   if (!payload_head_) {
     payload_head_ = payload.get();
   }
@@ -187,6 +174,8 @@ Packet &Packet::appendPayload(const uint8_t *buffer, std::size_t length) {
 }
 
 Packet &Packet::appendHeader(std::unique_ptr<utils::MemBuf> &&header) {
+  separateHeaderPayload();
+
   if (!payload_head_) {
     header_head_->prependChain(std::move(header));
   } else {
@@ -202,6 +191,8 @@ Packet &Packet::appendHeader(const uint8_t *buffer, std::size_t length) {
 }
 
 utils::Array<uint8_t> Packet::getPayload() const {
+  const_cast<Packet *>(this)->separateHeaderPayload();
+
   if (TRANSPORT_EXPECT_FALSE(payload_head_ == nullptr)) {
     return utils::Array<uint8_t>();
   }
@@ -263,6 +254,8 @@ Packet::Format Packet::getFormat() const {
 const std::shared_ptr<utils::MemBuf> Packet::data() { return packet_; }
 
 void Packet::dump() const {
+  const_cast<Packet *>(this)->separateHeaderPayload();
+
   std::cout << "HEADER -- Length: " << headerSize() << std::endl;
   hicn_packet_dump((uint8_t *)header_head_->data(), headerSize());
 
@@ -604,6 +597,35 @@ uint8_t Packet::getTTL() const {
   return hops;
 }
 
+void Packet::separateHeaderPayload() {
+  if (payload_head_) {
+    return;
+  }
+
+  int signature_size = 0;
+
+  if (_is_ah(format_)) {
+    signature_size = (uint32_t)getSignatureSize();
+  }
+
+  auto header_size = getHeaderSizeFromFormat(format_, signature_size);
+  auto payload_length = packet_->length() - header_size;
+  if (!payload_length) {
+    return;
+  }
+
+  packet_->trimEnd(packet_->length());
+
+  if (payload_length) {
+    auto payload = packet_->cloneOne();
+    payload_head_ = payload.get();
+    payload_head_->advance(header_size);
+    payload_head_->append(payload_length);
+    packet_->prependChain(std::move(payload));
+    packet_->append(header_size);
+  }
+}
+
 }  // end namespace core
 
 }  // end namespace transport
diff --git a/libtransport/src/hicn/transport/core/packet.h b/libtransport/src/hicn/transport/core/packet.h
index add830c1e..78dbeae07 100644
--- a/libtransport/src/hicn/transport/core/packet.h
+++ b/libtransport/src/hicn/transport/core/packet.h
@@ -93,6 +93,8 @@ class Packet : public std::enable_shared_from_this<Packet> {
 
   static Format getFormatFromBuffer(const uint8_t *buffer);
 
+  virtual void replace(MemBufPtr &&buffer);
+
   std::size_t payloadSize() const;
 
   std::size_t headerSize() const;
@@ -101,12 +103,16 @@ class Packet : public std::enable_shared_from_this<Packet> {
 
   const uint8_t *start() const;
 
-  virtual void setLifetime(uint32_t lifetime);
-
   virtual const Name &getName() const = 0;
 
   virtual Name &getWritableName() = 0;
 
+  virtual void setName(const Name &name) = 0;
+
+  virtual void setName(Name &&name) = 0;
+
+  virtual void setLifetime(uint32_t lifetime);
+
   virtual uint32_t getLifetime() const;
 
   Packet &appendPayload(const uint8_t *buffer, std::size_t length);
@@ -179,6 +185,7 @@ class Packet : public std::enable_shared_from_this<Packet> {
   void setSignatureSize(std::size_t size_bytes);
   std::size_t getSignatureSize() const;
   uint8_t *getSignature() const;
+  void separateHeaderPayload();
 
  protected:
   Name name_;
diff --git a/libtransport/src/hicn/transport/core/pending_interest.cc b/libtransport/src/hicn/transport/core/pending_interest.cc
index 73bc41e87..dbbd2c83e 100644
--- a/libtransport/src/hicn/transport/core/pending_interest.cc
+++ b/libtransport/src/hicn/transport/core/pending_interest.cc
@@ -23,36 +23,31 @@ PendingInterest::PendingInterest()
     : interest_(nullptr, nullptr),
       timer_(),
       on_content_object_callback_(),
-      on_interest_timeout_callback_(),
-      received_(false) {}
+      on_interest_timeout_callback_() {}
 
 PendingInterest::PendingInterest(Interest::Ptr &&interest,
                                  std::unique_ptr<asio::steady_timer> &&timer)
     : interest_(std::move(interest)),
       timer_(std::move(timer)),
       on_content_object_callback_(),
-      on_interest_timeout_callback_(),
-      received_(false) {}
+      on_interest_timeout_callback_() {}
 
 PendingInterest::PendingInterest(
-    Interest::Ptr &&interest, const OnContentObjectCallback &&on_content_object,
-    const OnInterestTimeoutCallback &&on_interest_timeout,
+    Interest::Ptr &&interest, OnContentObjectCallback &&on_content_object,
+    OnInterestTimeoutCallback &&on_interest_timeout,
     std::unique_ptr<asio::steady_timer> &&timer)
     : interest_(std::move(interest)),
       timer_(std::move(timer)),
       on_content_object_callback_(std::move(on_content_object)),
-      on_interest_timeout_callback_(std::move(on_interest_timeout)),
-      received_(false) {}
+      on_interest_timeout_callback_(std::move(on_interest_timeout)) {}
 
-PendingInterest::~PendingInterest() {
-  // timer_.reset();
-}
+PendingInterest::~PendingInterest() {}
 
 void PendingInterest::cancelTimer() { timer_->cancel(); }
 
-void PendingInterest::setReceived() { received_ = true; }
-
-bool PendingInterest::isReceived() const { return received_; }
+void PendingInterest::setInterest(Interest::Ptr &&interest) {
+  interest_ = std::move(interest);
+}
 
 Interest::Ptr &&PendingInterest::getInterest() { return std::move(interest_); }
 
@@ -60,8 +55,8 @@ const OnContentObjectCallback &PendingInterest::getOnDataCallback() const {
   return on_content_object_callback_;
 }
 
-void PendingInterest::setOnDataCallback(
-    const OnContentObjectCallback &on_content_object) {
+void PendingInterest::setOnContentObjectCallback(
+    OnContentObjectCallback &&on_content_object) {
   PendingInterest::on_content_object_callback_ = on_content_object;
 }
 
@@ -70,7 +65,7 @@ const OnInterestTimeoutCallback &PendingInterest::getOnTimeoutCallback() const {
 }
 
 void PendingInterest::setOnTimeoutCallback(
-    const OnInterestTimeoutCallback &on_interest_timeout) {
+    OnInterestTimeoutCallback &&on_interest_timeout) {
   PendingInterest::on_interest_timeout_callback_ = on_interest_timeout;
 }
 
diff --git a/libtransport/src/hicn/transport/core/pending_interest.h b/libtransport/src/hicn/transport/core/pending_interest.h
index 3b2442d76..c481cc200 100644
--- a/libtransport/src/hicn/transport/core/pending_interest.h
+++ b/libtransport/src/hicn/transport/core/pending_interest.h
@@ -46,14 +46,15 @@ class PendingInterest {
   friend class Portal<RawSocketInterface>;
 
  public:
+  using Ptr = utils::ObjectPool<PendingInterest>::Ptr;
   PendingInterest();
 
   PendingInterest(Interest::Ptr &&interest,
                   std::unique_ptr<asio::steady_timer> &&timer);
 
   PendingInterest(Interest::Ptr &&interest,
-                  const OnContentObjectCallback &&on_content_object,
-                  const OnInterestTimeoutCallback &&on_interest_timeout,
+                  OnContentObjectCallback &&on_content_object,
+                  OnInterestTimeoutCallback &&on_interest_timeout,
                   std::unique_ptr<asio::steady_timer> &&timer);
 
   ~PendingInterest();
@@ -62,32 +63,28 @@ class PendingInterest {
   TRANSPORT_ALWAYS_INLINE void startCountdown(Handler &&cb) {
     timer_->expires_from_now(
         std::chrono::milliseconds(interest_->getLifetime()));
-    timer_->async_wait(cb);
+    timer_->async_wait(std::forward<Handler &&>(cb));
   }
 
   void cancelTimer();
 
-  void setReceived();
-
-  bool isReceived() const;
-
   Interest::Ptr &&getInterest();
 
+  void setInterest(Interest::Ptr &&interest);
+
   const OnContentObjectCallback &getOnDataCallback() const;
 
-  void setOnDataCallback(const OnContentObjectCallback &on_content_object);
+  void setOnContentObjectCallback(OnContentObjectCallback &&on_content_object);
 
   const OnInterestTimeoutCallback &getOnTimeoutCallback() const;
 
-  void setOnTimeoutCallback(
-      const OnInterestTimeoutCallback &on_interest_timeout);
+  void setOnTimeoutCallback(OnInterestTimeoutCallback &&on_interest_timeout);
 
  private:
   Interest::Ptr interest_;
   std::unique_ptr<asio::steady_timer> timer_;
   OnContentObjectCallback on_content_object_callback_;
   OnInterestTimeoutCallback on_interest_timeout_callback_;
-  bool received_;
 };
 
 }  // end namespace core
diff --git a/libtransport/src/hicn/transport/core/portal.h b/libtransport/src/hicn/transport/core/portal.h
index 7efbc2009..4abcbe2cd 100644
--- a/libtransport/src/hicn/transport/core/portal.h
+++ b/libtransport/src/hicn/transport/core/portal.h
@@ -35,16 +35,182 @@
 #include <asio/steady_timer.hpp>
 #include <future>
 #include <memory>
+#include <queue>
 #include <unordered_map>
 
 #define UNSET_CALLBACK 0
 
 namespace transport {
-
 namespace core {
 
-typedef std::unordered_map<Name, std::unique_ptr<PendingInterest>>
-    PendingInterestHashTable;
+namespace portal_details {
+
+static constexpr uint32_t pool_size = 2048;
+
+class HandlerMemory {
+  static constexpr std::size_t memory_size = 1024 * 1024;
+ public:
+  HandlerMemory() : index_(0) {  }
+
+  HandlerMemory(const HandlerMemory&) = delete;
+  HandlerMemory& operator=(const HandlerMemory&) = delete;
+
+  TRANSPORT_ALWAYS_INLINE void* allocate(std::size_t size) {
+    return &storage_[index_++ % memory_size];
+  }
+
+  TRANSPORT_ALWAYS_INLINE void deallocate(void* pointer) {  }
+
+ private:
+  // Storage space used for handler-based custom memory allocation.
+  typename std::aligned_storage<128>::type storage_[memory_size];
+  uint32_t index_;
+};
+
+// The allocator to be associated with the handler objects. This allocator only
+// needs to satisfy the C++11 minimal allocator requirements.
+template <typename T>
+class HandlerAllocator {
+ public:
+  using value_type = T;
+
+  explicit HandlerAllocator(HandlerMemory& mem)
+    : memory_(mem) {}
+
+  template <typename U>
+  HandlerAllocator(const HandlerAllocator<U>& other) noexcept
+    : memory_(other.memory_) { }
+
+  TRANSPORT_ALWAYS_INLINE bool operator==(const HandlerAllocator& other) const noexcept {
+    return &memory_ == &other.memory_;
+  }
+
+  TRANSPORT_ALWAYS_INLINE bool operator!=(const HandlerAllocator& other) const noexcept {
+    return &memory_ != &other.memory_;
+  }
+
+  TRANSPORT_ALWAYS_INLINE T* allocate(std::size_t n) const {
+    return static_cast<T*>(memory_.allocate(sizeof(T) * n));
+  }
+
+  TRANSPORT_ALWAYS_INLINE void deallocate(T* p, std::size_t /*n*/) const {
+    return memory_.deallocate(p);
+  }
+
+ private:
+  template <typename> friend class HandlerAllocator;
+
+  // The underlying memory.
+  HandlerMemory& memory_;
+};
+
+// Wrapper class template for handler objects to allow handler memory
+// allocation to be customised. The allocator_type type and get_allocator()
+// member function are used by the asynchronous operations to obtain the
+// allocator. Calls to operator() are forwarded to the encapsulated handler.
+template <typename Handler>
+class CustomAllocatorHandler {
+ public:
+  using allocator_type = HandlerAllocator<Handler>;
+
+  CustomAllocatorHandler(HandlerMemory& m, Handler h)
+    : memory_(m),
+      handler_(h) { }
+
+  allocator_type get_allocator() const noexcept {
+    return allocator_type(memory_);
+  }
+
+  template <typename ...Args>
+  void operator()(Args&&... args) {
+    handler_(std::forward<Args>(args)...);
+  }
+
+ private:
+  HandlerMemory& memory_;
+  Handler handler_;
+};
+
+// Helper function to wrap a handler object to add custom allocation.
+template <typename Handler>
+inline CustomAllocatorHandler<Handler> makeCustomAllocatorHandler(
+    HandlerMemory& m, Handler h) {
+  return CustomAllocatorHandler<Handler>(m, h);
+}
+
+class Pool {
+ public:
+  Pool(asio::io_service &io_service)
+    : io_service_(io_service) {
+    increasePendingInterestPool();
+    increaseInterestPool();
+    increaseContentObjectPool();
+  }
+
+  TRANSPORT_ALWAYS_INLINE void increasePendingInterestPool() {
+    // Create pool of pending interests to reuse
+    for (uint32_t i = 0; i < pool_size; i++) {
+      pending_interests_pool_.add(new PendingInterest(
+          Interest::Ptr(nullptr),
+          std::make_unique<asio::steady_timer>(io_service_)));
+    }
+  }
+
+  TRANSPORT_ALWAYS_INLINE void increaseInterestPool() {
+    // Create pool of interests to reuse
+    for (uint32_t i = 0; i < pool_size; i++) {
+      interest_pool_.add(new Interest());
+    }
+  }
+
+  TRANSPORT_ALWAYS_INLINE void increaseContentObjectPool() {
+    // Create pool of content object to reuse
+    for (uint32_t i = 0; i < pool_size; i++) {
+      content_object_pool_.add(new ContentObject());
+    }
+  }
+
+  PendingInterest::Ptr getPendingInterest() {
+    auto res = pending_interests_pool_.get();
+    while (TRANSPORT_EXPECT_FALSE(!res.first)) {
+      increasePendingInterestPool();
+      res = pending_interests_pool_.get();
+    }
+
+    return std::move(res.second);
+  }
+
+  TRANSPORT_ALWAYS_INLINE ContentObject::Ptr getContentObject() {
+    auto res = content_object_pool_.get();
+    while (TRANSPORT_EXPECT_FALSE(!res.first)) {
+      increaseContentObjectPool();
+      res = content_object_pool_.get();
+    }
+
+    return std::move(res.second);
+  }
+
+  TRANSPORT_ALWAYS_INLINE Interest::Ptr getInterest() {
+    auto res = interest_pool_.get();
+    while (TRANSPORT_EXPECT_FALSE(!res.first)) {
+      increaseInterestPool();
+      res = interest_pool_.get();
+    }
+
+    return std::move(res.second);
+  }
+
+ private:
+  utils::ObjectPool<PendingInterest> pending_interests_pool_;
+  utils::ObjectPool<ContentObject> content_object_pool_;
+  utils::ObjectPool<Interest> interest_pool_;
+  asio::io_service &io_service_;
+};
+
+}
+
+using PendingInterestHashTable =
+    std::unordered_map<uint32_t, PendingInterest::Ptr>;
 
 template <typename PrefixType>
 class BasicBindConfig {
@@ -84,7 +250,6 @@ class Portal {
                                          typename ForwarderInt::ConnectorType>,
                       ForwarderInt>::value,
       "ForwarderInt must inherit from ForwarderInterface!");
-
  public:
   class ConsumerCallback {
    public:
@@ -108,7 +273,8 @@ class Portal {
                              std::placeholders::_1),
                    std::bind(&Portal::setLocalRoutes, this), io_service_,
                    app_name_),
-        forwarder_interface_(connector_) {}
+        forwarder_interface_(connector_),
+        packet_pool_(io_service) {  }
 
   void setConsumerCallback(ConsumerCallback *consumer_callback) {
     consumer_callback_ = consumer_callback;
@@ -124,64 +290,59 @@ class Portal {
   }
 
   TRANSPORT_ALWAYS_INLINE void connect(bool is_consumer = true) {
+    pending_interest_hash_table_.reserve(portal_details::pool_size);
     forwarder_interface_.connect(is_consumer);
   }
 
   ~Portal() { stopEventsLoop(true); }
 
   TRANSPORT_ALWAYS_INLINE bool interestIsPending(const Name &name) {
-    auto it = pending_interest_hash_table_.find(name);
-    if (it != pending_interest_hash_table_.end())
-      if (!it->second->isReceived()) return true;
+    auto it =
+        pending_interest_hash_table_.find(name.getHash32() + name.getSuffix());
+    if (it != pending_interest_hash_table_.end()) {
+      return true;
+    }
 
     return false;
   }
 
-  TRANSPORT_ALWAYS_INLINE void sendInterest(Interest::Ptr &&interest) {
-    const Name name(interest->getName(), true);
-
-    // Send it
-    forwarder_interface_.send(*interest);
-
-    pending_interest_hash_table_[name] = std::make_unique<PendingInterest>(
-        std::move(interest), std::make_unique<asio::steady_timer>(io_service_));
-
-    pending_interest_hash_table_[name]->startCountdown(
-        std::bind(&Portal<ForwarderInt>::timerHandler, this,
-                  std::placeholders::_1, name));
-  }
-
   TRANSPORT_ALWAYS_INLINE void sendInterest(
       Interest::Ptr &&interest,
-      const OnContentObjectCallback &&on_content_object_callback,
-      const OnInterestTimeoutCallback &&on_interest_timeout_callback) {
-    const Name name(interest->getName(), true);
-
+      OnContentObjectCallback &&on_content_object_callback = UNSET_CALLBACK,
+      OnInterestTimeoutCallback &&on_interest_timeout_callback =
+          UNSET_CALLBACK) {
+    uint32_t hash =
+        interest->getName().getHash32() + interest->getName().getSuffix();
     // Send it
     forwarder_interface_.send(*interest);
 
-    pending_interest_hash_table_[name] = std::make_unique<PendingInterest>(
-        std::move(interest), std::move(on_content_object_callback),
-        std::move(on_interest_timeout_callback),
-        std::make_unique<asio::steady_timer>(io_service_));
-
-    pending_interest_hash_table_[name]->startCountdown(
+    auto pending_interest = packet_pool_.getPendingInterest();
+    pending_interest->setInterest(std::move(interest));
+    pending_interest->setOnContentObjectCallback(
+        std::move(on_content_object_callback));
+    pending_interest->setOnTimeoutCallback(
+        std::move(on_interest_timeout_callback));
+    pending_interest->startCountdown(
+        portal_details::makeCustomAllocatorHandler(
+        async_callback_memory_,
         std::bind(&Portal<ForwarderInt>::timerHandler, this,
-                  std::placeholders::_1, name));
+                  std::placeholders::_1, hash)));
+    pending_interest_hash_table_.emplace(
+        std::make_pair(hash, std::move(pending_interest)));
   }
 
   TRANSPORT_ALWAYS_INLINE void timerHandler(const std::error_code &ec,
-                                            const Name &name) {
+                                            uint32_t hash) {
     bool is_stopped = io_service_.stopped();
     if (TRANSPORT_EXPECT_FALSE(is_stopped)) {
       return;
     }
 
     if (TRANSPORT_EXPECT_TRUE(!ec)) {
-      std::unordered_map<Name, std::unique_ptr<PendingInterest>>::iterator it =
-          pending_interest_hash_table_.find(name);
+      PendingInterestHashTable::iterator it =
+          pending_interest_hash_table_.find(hash);
       if (it != pending_interest_hash_table_.end()) {
-        std::unique_ptr<PendingInterest> ptr = std::move(it->second);
+        PendingInterest::Ptr ptr = std::move(it->second);
         pending_interest_hash_table_.erase(it);
 
         if (ptr->getOnTimeoutCallback() != UNSET_CALLBACK) {
@@ -273,10 +434,13 @@ class Portal {
 
     if (TRANSPORT_EXPECT_TRUE(_is_tcp(format))) {
       if (!Packet::isInterest(packet_buffer->data())) {
-        processContentObject(
-            ContentObject::Ptr(new ContentObject(std::move(packet_buffer))));
+        auto content_object = packet_pool_.getContentObject();
+        content_object->replace(std::move(packet_buffer));
+        processContentObject(std::move(content_object));
       } else {
-        processInterest(Interest::Ptr(new Interest(std::move(packet_buffer))));
+        auto interest = packet_pool_.getInterest();
+        interest->replace(std::move(packet_buffer));
+        processInterest(std::move(interest));
       }
     } else {
       TRANSPORT_LOGE("Received not supported packet. Ignoring it.");
@@ -298,30 +462,23 @@ class Portal {
 
   TRANSPORT_ALWAYS_INLINE void processContentObject(
       ContentObject::Ptr &&content_object) {
-    PendingInterestHashTable::iterator it =
-        pending_interest_hash_table_.find(content_object->getName());
+    uint32_t hash = content_object->getName().getHash32() +
+                    content_object->getName().getSuffix();
 
-    if (TRANSPORT_EXPECT_TRUE(it != pending_interest_hash_table_.end())) {
-      std::unique_ptr<PendingInterest> interest_ptr = std::move(it->second);
+    auto it = pending_interest_hash_table_.find(hash);
+    if (it != pending_interest_hash_table_.end()) {
+      PendingInterest::Ptr interest_ptr = std::move(it->second);
+      pending_interest_hash_table_.erase(it);
       interest_ptr->cancelTimer();
 
-      if (TRANSPORT_EXPECT_TRUE(!interest_ptr->isReceived())) {
-        interest_ptr->setReceived();
-        pending_interest_hash_table_.erase(content_object->getName());
-
-        if (interest_ptr->getOnDataCallback() != UNSET_CALLBACK) {
-          interest_ptr->on_content_object_callback_(
-              std::move(interest_ptr->getInterest()),
-              std::move(content_object));
-        } else if (consumer_callback_) {
-          consumer_callback_->onContentObject(
-              std::move(interest_ptr->getInterest()),
-              std::move(content_object));
-        }
-
-      } else {
-        TRANSPORT_LOGW(
-            "Content already received (interest already satisfied).");
+      if (interest_ptr->getOnDataCallback() != UNSET_CALLBACK) {
+        interest_ptr->on_content_object_callback_(
+            std::move(interest_ptr->getInterest()),
+            std::move(content_object));
+      } else if (consumer_callback_) {
+        consumer_callback_->onContentObject(
+            std::move(interest_ptr->getInterest()),
+            std::move(content_object));
       }
     } else {
       TRANSPORT_LOGW("No pending interests for current content (%s)",
@@ -349,9 +506,8 @@ class Portal {
   ForwarderInt forwarder_interface_;
 
   std::list<Prefix> served_namespaces_;
-
-  ip_address_t locator4_;
-  ip_address_t locator6_;
+  portal_details::HandlerMemory async_callback_memory_;
+  portal_details::Pool packet_pool_;
 };
 
 }  // end namespace core
diff --git a/libtransport/src/hicn/transport/interfaces/socket_options_default_values.h b/libtransport/src/hicn/transport/interfaces/socket_options_default_values.h
index 142228aeb..046fea892 100644
--- a/libtransport/src/hicn/transport/interfaces/socket_options_default_values.h
+++ b/libtransport/src/hicn/transport/interfaces/socket_options_default_values.h
@@ -39,8 +39,6 @@ static constexpr uint32_t log_2_default_buffer_size = 12;
 static constexpr uint32_t signature_size = 260;           // bytes
 static constexpr uint32_t key_locator_size = 60;          // bytes
 static constexpr uint32_t limit_guard = 80;               // bytes
-static constexpr uint32_t min_window_size = 1;            // Interests
-static constexpr uint32_t max_window_size = 256;          // Interests
 static constexpr uint32_t digest_size = 34;               // bytes
 static constexpr uint32_t max_out_of_order_segments = 3;  // content object
 
@@ -60,9 +58,11 @@ static constexpr double alpha = 0.8;
 static constexpr uint32_t rate_choice = 0;
 
 // maximum allowed values
-const uint32_t transport_protocol_min_retransmissions = 0;
-const uint32_t transport_protocol_max_retransmissions = 128;
-const uint32_t max_content_object_size = 8096;
+static constexpr uint32_t transport_protocol_min_retransmissions = 0;
+static constexpr uint32_t transport_protocol_max_retransmissions = 128;
+static constexpr uint32_t max_content_object_size = 8096;
+static constexpr uint32_t min_window_size = 1;            // Interests
+static constexpr uint32_t max_window_size = 256 * 2;          // Interests
 
 }  // namespace default_values