201 lines
3.9 KiB
C++
201 lines
3.9 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2006 INRIA
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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*/
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#include "ns3/system-wall-clock-ms.h"
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#include "ns3/packet.h"
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#include "ns3/packet-history.h"
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#include <iostream>
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#include <sstream>
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using namespace ns3;
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template <int N>
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class BenchHeader : public Header
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{
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public:
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BenchHeader ();
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bool IsOk (void) const;
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private:
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virtual std::string DoGetName (void) const;
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virtual void PrintTo (std::ostream &os) const;
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virtual uint32_t GetSerializedSize (void) const;
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virtual void SerializeTo (Buffer::Iterator start) const;
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virtual uint32_t DeserializeFrom (Buffer::Iterator start);
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bool m_ok;
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};
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template <int N>
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BenchHeader<N>::BenchHeader ()
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: m_ok (false)
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{}
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template <int N>
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bool
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BenchHeader<N>::IsOk (void) const
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{
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return m_ok;
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}
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template <int N>
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std::string
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BenchHeader<N>::DoGetName (void) const
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{
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std::ostringstream oss;
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oss << N;
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return oss.str ();
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}
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template <int N>
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void
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BenchHeader<N>::PrintTo (std::ostream &os) const
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{
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NS_ASSERT (false);
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}
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template <int N>
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uint32_t
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BenchHeader<N>::GetSerializedSize (void) const
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{
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return N;
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}
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template <int N>
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void
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BenchHeader<N>::SerializeTo (Buffer::Iterator start) const
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{
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start.WriteU8 (N, N);
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}
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template <int N>
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uint32_t
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BenchHeader<N>::DeserializeFrom (Buffer::Iterator start)
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{
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m_ok = true;
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for (int i = 0; i < N; i++)
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{
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if (start.ReadU8 () != N)
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{
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m_ok = false;
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}
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}
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return N;
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}
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static void
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benchPtrA (uint32_t n)
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{
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BenchHeader<25> ipv4;
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BenchHeader<8> udp;
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for (uint32_t i = 0; i < n; i++) {
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Packet p (2000);
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p.AddHeader (udp);
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p.AddHeader (ipv4);
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Packet o = p;
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o.RemoveHeader (ipv4);
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o.RemoveHeader (udp);
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}
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}
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static void
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benchPtrB (uint32_t n)
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{
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BenchHeader<25> ipv4;
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BenchHeader<8> udp;
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for (uint32_t i = 0; i < n; i++) {
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Packet p (2000);
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p.AddHeader (udp);
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p.AddHeader (ipv4);
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}
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}
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static void
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ptrC2 (Packet p)
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{
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BenchHeader<8> udp;
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p.RemoveHeader (udp);
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}
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static void
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ptrC1 (Packet p)
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{
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BenchHeader<25> ipv4;
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p.RemoveHeader (ipv4);
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ptrC2 (p);
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}
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static void
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benchPtrC (uint32_t n)
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{
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BenchHeader<25> ipv4;
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BenchHeader<8> udp;
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for (uint32_t i = 0; i < n; i++) {
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Packet p (2000);
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p.AddHeader (udp);
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p.AddHeader (ipv4);
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ptrC1 (p);
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}
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}
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static void
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runBench (void (*bench) (uint32_t), uint32_t n, char const *name)
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{
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SystemWallClockMs time;
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time.Start ();
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(*bench) (n);
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unsigned long long deltaMs = time.End ();
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double ps = n;
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ps *= 1000;
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ps /= deltaMs;
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std::cout << name<<"=" << ps << " packets/s" << std::endl;
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}
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int main (int argc, char *argv[])
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{
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uint32_t n = 0;
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while (argc > 0) {
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if (strncmp ("--n=", argv[0],strlen ("--n=")) == 0)
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{
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char const *nAscii = argv[0] + strlen ("--n=");
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n = atoi (nAscii);
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}
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if (strncmp ("--enable-history", argv[0], strlen ("--enable-history")) == 0)
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{
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PacketHistory::Enable ();
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}
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argc--;
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argv++;
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}
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runBench (&benchPtrA, n, "a");
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PacketHistory::PrintStats ();
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runBench (&benchPtrB, n, "b");
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PacketHistory::PrintStats ();
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runBench (&benchPtrC, n, "c");
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PacketHistory::PrintStats ();
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return 0;
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}
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