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let the CPU sleep for 1 ms if there is no tic to proceed

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This brings CPU usage down from 100% to ~18% on my system - just like
Chocolate Doom.
This commit is contained in:
Fabian Greffrath 2019-12-23 13:12:29 +01:00
parent 7af1150cb1
commit 15131a1cc2
3 changed files with 7 additions and 0 deletions
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1
Source/d_net.c
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@ -758,6 +758,7 @@ void TryRunTics (void)
M_Ticker (); M_Ticker ();
return; return;
} }
I_Sleep(1);
} }
// run the count * ticdup dics // run the count * ticdup dics

5
Source/i_system.c
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@ -59,6 +59,11 @@ void I_WaitVBL(int count)
SDL_Delay((count*500)/TICRATE); SDL_Delay((count*500)/TICRATE);
} }
void I_Sleep(int ms)
{
SDL_Delay(ms);
}
// Most of the following has been rewritten by Lee Killough // Most of the following has been rewritten by Lee Killough
// //
// I_GetTime // I_GetTime

1
Source/i_video.h
View File

@ -47,6 +47,7 @@ void I_FinishUpdate (void);
// Wait for vertical retrace or pause a bit. // Wait for vertical retrace or pause a bit.
void I_WaitVBL(int count); void I_WaitVBL(int count);
void I_Sleep(int ms);
void I_ReadScreen (byte* scr); void I_ReadScreen (byte* scr);