high CPU usage after compile and debug

[moonchild]

• high CPU usage after compile and debug

Hello
i found this very nice Tool, dev cpp and ist great.
but one thing is strage : after some steps such as compile , debug, execute is my PC very slow.
task manager says DEV Cpp use 90-95 % of CPU.
Question to developers :
is there no sleep or sleep is too short in devcpp threads ?

[Wayne Keen]

Which version of Dev are you using?

Wayne

[Nobody/Anonymous]

today morning... not only that compiling&linking in debug mode took so long time. the creature even shot down my computer! no fun...the cpu simply overheated. had anyone ever got the same problem? LIX

[moonchild]

Some more information to this :
my operation systems are WINXP an WIN2K
compile : simple win console app an win32 APP
each 1 cpp - file, filesize 700-900 kb
i use dev cpp 4.9.9.2, downloaded
and installed full on 11.05.2005

[Wayne Keen]

11.05.2005?

So you did not upgrade your gdb version?

Wayne

[moonchild]

aehm, downloaded and installed on 11.04.2005
sorry, i had a heard monday :)

[moonchild]

packages are:
GNU Debugger 6.3-1
gcc-objc 3.4.2-20040916-1
binutils 2.15.94-20050118-1
Insight_Bin 1.0

[moonchild]

now i have istalled dev cpp full now up do date
on 11.04.2005 21:20 GMT, - very latest version
on another PC, with win2k too, have same problems with hight CPU usage..

[Nobody/Anonymous]

I found the following code causes CPU usage to drop dramaticly both when the window is in focus and when it is out of focus.

    // Make sure the game engine isn't sleeping
    if (!GameEngine::GetEngine()->GetSleep())
    {
      // Check the tick count to see if a game cycle has elapsed
      iTickCount = GetTickCount();
      if (iTickCount > iTickTrigger)
      {
        iTickTrigger = iTickCount +
          GameEngine::GetEngine()->GetFrameDelay();
        HandleKeys();
        GameEngine::GetEngine()->CheckJoystick();
        GameCycle();
      }
      // Lower CPU usage when window is in focus
      else {
       Sleep(iTickTrigger - iTickCount); 
      }
    }
    // Lower CPU usage when window is out of focus
    else {
      Sleep(iTickTrigger - iTickCount); 
    }
  }
}
return (int)msg.wParam;

}

// End the game
GameEnd();

return TRUE;
}

[Wayne Keen]

You installed Insight. Is it configured as your default debugger? Or gdb?

Sorry for the questions, I am slow.

Wayne

[moonchild]

i had these problems im my own application too,
i had started a win-worker-thread within the app,
and let him work permanently. this causes high cpu usage. i worked with MS dev stud 6.0, VC++
after i build an "Sleep()" in that thread, things looks much better..sleep interval was ~ 100 ms only

hope this helps you somehow,

moonchild, germany

[moonchild]

Where i can set default debugger ?

[Wayne Keen]

Tools:Compiler Options - down that path if memory serves. (Doubtful ;)

Wayne

[moonchild]

debugger is : gdb.exe

other tools are
gcc.exe,
g++.exe
make.exe
windres.exe
dllwrap.exe
gprof.exe

[Wayne Keen]

Can you post a simple as possible example program and what you have been looking at so that your results can be duplicated by others?

Wayne

[moonchild]

my programm opens adobe reader , print some files with adobe reader and close adobe.
the "high usage" is not always there, but after i compile, debug , run.. after some constellation of these steps. i dont'n know right , how i can reproduce it.. hm strage..
if i should post my cpp, there are 386 lines..
that is too big for a newsgroup thread ?

[moonchild]

then.. its not easy to reproduce this

[Nobody/Anonymous]

I had a similar prolem 2 or 3 years ago, when stepping though some code with the debugger, dev-cpp's CPU usage would soar to 100%.

Sadly, it is not an easily reproducible problem. I suspect it has something to do with gdb. I had filed a bug report (I think the title was "to infinity and beyond", but it got closed without any resolution).

Sorry, this does nothing to address your problem ....

rr

[Nobody/Anonymous]

Just to let you know this is not an isolated issue; I have the same problem, and also had it in 4.9.9.1 (and some earlier version as well).

It is, perhaps, related to memory leakages? Often the 99% CPU usage appears when quiting a debugging session by clicking the tick-mark (debug) without letting the program run to its end. But then again, equally often the CPU usage soars during the debugging itself...

I'm running Dev-Cpp against Cygwin, btw, but using the Mingw gdb (the one in dev-cpp/bin).

A Blom

[E.Naumovich]

I got such problem, and I found that it occure when I `m trying to debug a code with memory allocation error (last time it was static non-initialized object). As I understood, problems rises in GDB-Dev-Cpp communications after attempts to watch "wrong" variable.

[Nobody/Anonymous]

had the same problem once,related to hardware issues, if you are the type who likes to overclock your hardware, you know now why this is a bad idea.

[Nobody/Anonymous]

Hi,

My humble opinion....

I observed the issue using different version of Devcpp, using different OS (win98,NT) and in several projects.

I was able to reproduce the problem systematically. It happens using the debugging interface embedded in devcpp. This is the main reason that pushed me to switch (back:-) ) to an external debugger like console gdb, Gnu visual debugger, Insight (in order of preference).

Now I am no longer observing the issue.

Max

[Robert Moynihan]

I agree with this assessment. I'm using Dev-C++ 4.9.9.2 on WinXP-SP2. I just downloaded this version last week, and I found that the embedded debugger gets into a problem when I a watching SOME variables -- I haven't narrowed it down further. I'm using all default settings (GCC compiler) to create a simple Win32 app. When debugging, processor usage for Dev-C++ goes flatlines near 100% and I have to kill Dev-C++ and restart the app to correct. If I just step through the code the problem doesn't seem to happen. Seems to be related ONLY to watching variables. Bob

[Robert Moynihan]

Err... I should also say that the high resource usage doesn't happen right away, but only after a few minutes of debugging, while watching different variables. I don't want to give the impression that it happens quickly, if anyone is actually looking for a cause. Bob

[Nobody/Anonymous]

Hi,

I also agree with the above post... I am using Dev-C++ 4.9.9.2 on windows XP pro (SP2)... Whenever I try to debug my CPU usage shoots to 100%.

Dennis