Lower cpu usage

[Gembrid]

without big explanations.

Here is a part of the code in main.exe

    startDraw = GetTickCount();
    
    drawFrame();

    frameTime = GetTickCount() - startDraw;

    while(frameTime < 40)
    {
        frameTime = GetTickCount() - startDraw;
    } 

Imagine that we have a simple scene and frame is drawn in 10ms.

After frame is drawn we get here

    while(frameTime < 40)
    {
        frameTime = GetTickCount() - startDraw;
    } 

for 30 ms we will use cpu just to check if 40ms have passed since frame started to draw.

why we just don't go to sleep for a little and then check for the passed time? Let the system do useful things

    while(frameTime < 40)
    {
        Sleep(1); // will sleep for 10-15 ms, depending on time accuracy
        frameTime = GetTickCount() - startDraw;
    } 

So the point is - don't waste cpu time if we have a simple frame that is drawn faster then 40 ms.




How to add this thing in main using ollydbg:

1. Search for SwapBuffers or glFlush (search for name/lable CTRL+N)

and you will find this part of the code

    frameTime = GetTickCount() - startDraw;

    while(frameTime < 40)
    {
        frameTime = GetTickCount() - startDraw;
    } 

in 97d it will look like this:



1.03.27 jpn:


2. Modify the code by adding sleep function call:

97d:


1.03.27 jpn:







Note: if main spends >= 40 ms for frame drawing, this thing won't save you from high cpu usage :D cpu will be busy in drawing frame


this thing needs testings, i made some tests + thx to Dios he made little tests, so test and maybe it will be useful

[MentaL]

[_Gabriel_]

It works. But as you said, if it needs more than 40ms to draw, the CPU usage is still high. For example in towns, where there are players.
A normal main uses 47-50% of my CPU.
With your solution, the main uses 18-23%. But unfortunately, not with many players around.

Anyway, great help from you. As always.

[Gembrid]

gmo main has this thing included, interesting if it was added before or after my guide :D

[8bitcore]

with small numbers of monsters and characters on the screen the CPU usage to 10%
awesome, thx

1.07v+

BYTE FixCpuUsage[7] = { 0xE9, 0x99, 0x5A, 0x4C, 0x00, 0x90, 0x90 };
BYTE FixCpuUsage2[13] = { 0x6A, 0x01, 0xFF, 0x15, 0x74, 0x51, 0x28, 0x09, 0xE9, 0x48, 0xA5, 0xB3, 0xFF };
memcpy((int*)0x004A9A82, FixCpuUsage, sizeof(FixCpuUsage));
memcpy((int*)0x0096F520, FixCpuUsage2, sizeof(FixCpuUsage2));

[innorax]

Okay, so I know that newbies are annoying and I'm a newbie, so could you guys explain it like for a neanderthal please?

[dedpro]

Help me pls. i dont understand what to do.

http://failiem.lv/down.php?i=ucvaboa&n=main.exe
This is S6e2 main

[lovestealer]

How to do this for main 1.07V+? . Can anyone show me way to do this? . Thanks :D

[lokoes321]

Already tried on a 97d main and i did it and looks exactly like yours, but when i get into the login screen, all freezes and i need to close the game.

[KarLi]

If this won't work then go to task manager with process hacker or task manager idk , and set priority to your gameserver LOW.

[lokoes321]

If this won't work then go to task manager with process hacker or task manager idk , and set priority to your gameserver LOW.

Uhm, this is for main... some mains have a high cpu usage, im using core i7 ivy bridge and some 97d mains uses 15% of my cpu... thats insanely high for playing only mu online.

[elite12sky]

i try same guide but can't find
1. Search for SwapBuffers or glFlush (search for name/lable CTRL+N)

Gembrid please answer my pm thank you.

[ashlay]

tested in main 1.03k jpn and works very nice.
ty =D

[ulfsark]

This is awesome, lowered from 25 to 17. :)

[lokoes321]

This is awesome, lowered from 25 to 17. :)

Mine from 15 to 4 :), its a very nice optimization.

[ulfsark]

Yea, 17 was the login screen, in the game it's 5. :)