xref: /gem5/src/systemc/tests/systemc/misc/memory_explosion/test01/test01.cpp

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/*****************************************************************************

  test01.cpp --

  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15

 *****************************************************************************/

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  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
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/*
Martin,
tis is a very simple test that I used to verify functionality and timing
with 1.2.1 on NT and I can see how memory consumption grows linearly with
time. When I ran my implementation I could see the program footprint of
about 400K during the whole simulation.
The test runs about 20 seconds and memory footprint grows to about 90MB. If
you run it longer it starts swapping memory do the disk and goes very
slowly. So I waited till it grew to 1GB and then killed it because all
computer does at that point is swapping memory. I guess if you let it run
long enough it would eventually die. I think this happens only with
optimized libraries.
*/

//--------------------------------------------------------------------------

#include <systemc.h>

#define sc_ns SC_NS
#define sc_ms SC_MS

class A : public sc_module
{
  sc_event e1;

  void f()
  {
    while(true)
    {
      e1.notify(sc_time(5,sc_ns));
      wait(e1);

      wait(2,sc_ns);
    }
  }
  public:
  sc_in_clk clk;
  SC_CTOR(A) { SC_THREAD(f); sensitive<<clk;}
};

class B : public sc_module
{
  sc_event e2, e3;
  void f()
  {
    while(true)
    {
      e2.notify(sc_time(1,sc_ns));
      wait(e2);

      e3.notify(sc_time(10,sc_ns));

      wait(e3);
    }
  }
  public:
  sc_in_clk clk;
  SC_CTOR(B) { SC_THREAD(f); sensitive<<clk;}
};

int sc_main(int argc, char* argv[])
{
  A a("a");
  B b("b");

 sc_time clk_time(10.0, sc_ns);
 sc_clock clock("clock",clk_time);
 a.clk(clock);
 b.clk(clock);

  sc_start(0, SC_NS);
  sc_time sim_time(10.,sc_ms);
  sc_start(sim_time);
  return 0;
}
//--------------------------------------------------------------------------