avoid stupid string allocation all the time.
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2006 INRIA
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
*/
#include "ns3/system-wall-clock-ms.h"
#include "ns3/packet.h"
#include "ns3/packet-metadata.h"
#include <iostream>
#include <sstream>
#include <string>
using namespace ns3;
template <int N>
class BenchHeader : public Header
{
public:
BenchHeader ();
bool IsOk (void) const;
static TypeId GetTypeId (void);
virtual TypeId GetInstanceTypeId (void) const;
virtual void Print (std::ostream &os) const;
virtual uint32_t GetSerializedSize (void) const;
virtual void Serialize (Buffer::Iterator start) const;
virtual uint32_t Deserialize (Buffer::Iterator start);
private:
static std::string GetTypeName (void);
bool m_ok;
};
template <int N>
BenchHeader<N>::BenchHeader ()
: m_ok (false)
{}
template <int N>
bool
BenchHeader<N>::IsOk (void) const
{
return m_ok;
}
template <int N>
std::string
BenchHeader<N>::GetTypeName (void)
{
std::ostringstream oss;
oss << "ns3::BenchHeader<" << N << ">";
return oss.str ();
}
template <int N>
TypeId
BenchHeader<N>::GetTypeId (void)
{
static TypeId tid = TypeId (GetTypeName ().c_str ())
.SetParent<Header> ()
;
return tid;
}
template <int N>
TypeId
BenchHeader<N>::GetInstanceTypeId (void) const
{
return GetTypeId ();
}
template <int N>
void
BenchHeader<N>::Print (std::ostream &os) const
{
NS_ASSERT (false);
}
template <int N>
uint32_t
BenchHeader<N>::GetSerializedSize (void) const
{
return N;
}
template <int N>
void
BenchHeader<N>::Serialize (Buffer::Iterator start) const
{
start.WriteU8 (N, N);
}
template <int N>
uint32_t
BenchHeader<N>::Deserialize (Buffer::Iterator start)
{
m_ok = true;
for (int i = 0; i < N; i++)
{
if (start.ReadU8 () != N)
{
m_ok = false;
}
}
return N;
}
static void
benchPtrA (uint32_t n)
{
BenchHeader<25> ipv4;
BenchHeader<8> udp;
for (uint32_t i = 0; i < n; i++) {
Ptr<Packet> p = Create<Packet> (2000);
p->AddHeader (udp);
p->AddHeader (ipv4);
Ptr<Packet> o = p->Copy ();
o->RemoveHeader (ipv4);
o->RemoveHeader (udp);
}
}
static void
benchPtrB (uint32_t n)
{
BenchHeader<25> ipv4;
BenchHeader<8> udp;
for (uint32_t i = 0; i < n; i++) {
Ptr<Packet> p = Create<Packet> (2000);
p->AddHeader (udp);
p->AddHeader (ipv4);
}
}
static void
ptrC2 (Ptr<Packet> p)
{
BenchHeader<8> udp;
p->RemoveHeader (udp);
}
static void
ptrC1 (Ptr<Packet> p)
{
BenchHeader<25> ipv4;
p->RemoveHeader (ipv4);
ptrC2 (p);
}
static void
benchPtrC (uint32_t n)
{
BenchHeader<25> ipv4;
BenchHeader<8> udp;
for (uint32_t i = 0; i < n; i++) {
Ptr<Packet> p = Create<Packet> (2000);
p->AddHeader (udp);
p->AddHeader (ipv4);
ptrC1 (p);
}
}
#if 0
static void
benchPrint (uint32_t n)
{
PacketPrinter printer;
BenchHeader<25> ipv4;
BenchHeader<8> udp;
Ptr<Packet> p = Create<Packet> (2000);
p->AddHeader (udp);
p->AddHeader (ipv4);
for (uint32_t i = 0; i < n; i++)
{
p->Print (std::cerr, printer);
}
}
#endif
static void
runBench (void (*bench) (uint32_t), uint32_t n, char const *name)
{
SystemWallClockMs time;
time.Start ();
(*bench) (n);
unsigned long long deltaMs = time.End ();
double ps = n;
ps *= 1000;
ps /= deltaMs;
std::cout << name<<"=" << ps << " packets/s" << std::endl;
}
int main (int argc, char *argv[])
{
uint32_t n = 0;
while (argc > 0) {
if (strncmp ("--n=", argv[0],strlen ("--n=")) == 0)
{
char const *nAscii = argv[0] + strlen ("--n=");
n = atoi (nAscii);
}
argc--;
argv++;
}
if (n == 0)
{
std::cerr << "Error-- number of packets must be specified " <<
"by command-line argument --n=(number of packets)" << std::endl;
exit (1);
}
std::cout << "Running bench-packets with n=" << n << std::endl;
Packet::EnableMetadata ();
runBench (&benchPtrA, n, "a");
runBench (&benchPtrB, n, "b");
runBench (&benchPtrC, n, "c");
//runBench (&benchPrint, n, "print");
runBench (&benchPtrA, n, "meta-a");
runBench (&benchPtrB, n, "meta-b");
runBench (&benchPtrC, n, "meta-c");
return 0;
}