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Implement time functions in tests and examples with std::chrono library

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This commit is contained in:
Eduardo Almeida
2022-02-08 01:49:38 +00:00
committed by Tommaso Pecorella
parent a4d174f8bf
commit ac680dd20c
2 changed files with 35 additions and 59 deletions
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43
src/nix-vector-routing/examples/nms-p2p-nix.cc
View File

@@ -38,10 +38,8 @@
* to make very large simulations.
*/
// for timing functions
#include <cstdlib>
#include <sys/time.h>
#include <fstream>
#include <chrono>
#include <sstream>
#include "ns3/core-module.h"
#include "ns3/internet-module.h"
@@ -55,11 +53,6 @@
using namespace ns3;
typedef struct timeval TIMER_TYPE;
#define TIMER_NOW(_t) gettimeofday (&_t,NULL);
#define TIMER_SECONDS(_t) ((double)(_t).tv_sec + (_t).tv_usec*1e-6)
#define TIMER_DIFF(_t1, _t2) (TIMER_SECONDS (_t1)-TIMER_SECONDS (_t2))
NS_LOG_COMPONENT_DEFINE ("CampusNetworkModel");
void Progress ()
@@ -157,8 +150,8 @@ private:
int
main (int argc, char *argv[])
{
TIMER_TYPE t0, t1, t2;
TIMER_NOW (t0);
auto t0 = std::chrono::steady_clock::now ();
std::cout << " ==== DARPA NMS CAMPUS NETWORK SIMULATION ====" << std::endl;
// LogComponentEnable ("OnOffApplication", LOG_LEVEL_INFO);
@@ -687,8 +680,7 @@ main (int argc, char *argv[])
}
std::cout << "Created " << NodeList::GetNNodes () << " nodes." << std::endl;
TIMER_TYPE routingStart;
TIMER_NOW (routingStart);
auto routingStart = std::chrono::steady_clock::now ();
if (nix)
{
@@ -702,25 +694,28 @@ main (int argc, char *argv[])
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
}
TIMER_TYPE routingEnd;
TIMER_NOW (routingEnd);
std::cout << "Routing tables population took "
<< TIMER_DIFF (routingEnd, routingStart) << std::endl;
auto routingEnd = std::chrono::steady_clock::now ();
std::cout << "Routing tables population took "
<< std::chrono::duration_cast<std::chrono::milliseconds> (routingEnd - routingStart).count () << "ms"
<< std::endl;
Simulator::ScheduleNow (Progress);
std::cout << "Running simulator..." << std::endl;
TIMER_NOW (t1);
auto t1 = std::chrono::steady_clock::now ();
Simulator::Stop (Seconds (100.0));
Simulator::Run ();
TIMER_NOW (t2);
auto t2 = std::chrono::steady_clock::now ();
std::cout << "Simulator finished." << std::endl;
Simulator::Destroy ();
double d1 = TIMER_DIFF (t1, t0), d2 = TIMER_DIFF (t2, t1);
std::cout << "-----" << std::endl << "Runtime Stats:" << std::endl;
std::cout << "Simulator init time: " << d1 << std::endl;
std::cout << "Simulator run time: " << d2 << std::endl;
std::cout << "Total elapsed time: " << d1+d2 << std::endl;
auto d1 = std::chrono::duration_cast<std::chrono::seconds>(t1 - t0);
auto d2 = std::chrono::duration_cast<std::chrono::seconds>(t2 - t1);
std::cout << "-----" << std::endl
<< "Runtime Stats:" << std::endl;
std::cout << "Simulator init time: " << d1.count () << "s" << std::endl;
std::cout << "Simulator run time: " << d2.count () << "s" << std::endl;
std::cout << "Total elapsed time: " << (d1 + d2).count () << "s" << std::endl;
delete[] nodes_netLR;
return 0;

51
utils/perf/perf-io.cc
View File

@@ -14,8 +14,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <ctime>
#include <sys/time.h>
#include <chrono>
#include <cstdio>
#include <cstdlib>
@@ -24,32 +23,9 @@
#include <fstream>
#include "ns3/core-module.h"
#include "ns3/abort.h"
using namespace ns3;
/// Microseconds to nanoseconds conversion factor.
static const uint64_t US_PER_NS = (uint64_t)1000;
/// Nanoseconds to seconds conversion factor.
static const uint64_t NS_PER_SEC = (uint64_t)1000000000;
/**
* \ingroup system-tests-perf
*
* Get the system clock time in nanoseconds.
*
* \return the system clock time in nanoseconds.
*/
uint64_t
GetRealtimeInNs (void)
{
struct timeval tv;
gettimeofday (&tv, NULL);
uint64_t nsResult = tv.tv_sec * NS_PER_SEC + tv.tv_usec * US_PER_NS;
return nsResult;
}
/**
* \ingroup system-tests-perf
*
@@ -85,7 +61,6 @@ PerfFile (FILE *file, uint32_t n, const char *buffer, uint32_t size)
void
PerfStream (std::ostream &stream, uint32_t n, const char *buffer, uint32_t size)
{
for (uint32_t i = 0; i < n; ++i)
{
stream.write (buffer, size);
@@ -99,7 +74,6 @@ main (int argc, char *argv[])
uint32_t iter = 50;
bool doStream = false;
bool binmode = true;
CommandLine cmd (__FILE__);
cmd.AddValue ("n", "How many times to write (defaults to 100000", n);
@@ -108,7 +82,8 @@ main (int argc, char *argv[])
cmd.AddValue ("binmode", "Select binary mode for the C++ I/O benchmark (defaults to true)", binmode);
cmd.Parse (argc, argv);
uint64_t result = std::numeric_limits<uint64_t>::max ();
auto minResultNs = std::chrono::duration_cast<std::chrono::nanoseconds> (
std::chrono::nanoseconds::max ());
char buffer[1024];
@@ -131,13 +106,15 @@ main (int argc, char *argv[])
stream.open ("streamtest", std::ios_base::out);
}
uint64_t start = GetRealtimeInNs ();
auto start = std::chrono::steady_clock::now ();
PerfStream (stream, n, buffer, 1024);
uint64_t et = GetRealtimeInNs () - start;
result = std::min (result, et);
auto end = std::chrono::steady_clock::now ();
auto resultNs = std::chrono::duration_cast<std::chrono::nanoseconds> (end - start);
resultNs = std::min (resultNs, minResultNs);
stream.close ();
std::cout << "."; std::cout.flush ();
}
std::cout << std::endl;
}
else
@@ -151,15 +128,19 @@ main (int argc, char *argv[])
{
FILE *file = fopen ("filetest", "w");
uint64_t start = GetRealtimeInNs ();
auto start = std::chrono::steady_clock::now ();
PerfFile (file, n, buffer, 1024);
uint64_t et = GetRealtimeInNs () - start;
result = std::min (result, et);
auto end = std::chrono::steady_clock::now ();
auto resultNs = std::chrono::duration_cast<std::chrono::nanoseconds> (end - start);
resultNs = std::min (resultNs, minResultNs);
fclose (file);
file = 0;
std::cout << "."; std::cout.flush ();
}
std::cout << std::endl;
}
std::cout << argv[0] << ": " << result << "ns" << std::endl;
std::cout << argv[0] << ": " << minResultNs.count () << "ns" << std::endl;
return 0;
}