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prevent auto cycle adjusting to lower the cycles too much on heavy background load

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3080
This commit is contained in:
Sebastian Strohhäcker 2008-01-16 20:17:15 +00:00
parent 4cb280c42a
commit ae447b6477
4 changed files with 74 additions and 20 deletions
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33
src/cpu/cpu.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2002-2007 The DOSBox Team
* Copyright (C) 2002-2008 The DOSBox Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: cpu.cpp,v 1.106 2007-12-07 20:49:19 c2woody Exp $ */
/* $Id: cpu.cpp,v 1.107 2008-01-16 20:17:15 c2woody Exp $ */
#include <assert.h>
#include <sstream>
@ -57,8 +57,9 @@ Bit32s CPU_CycleUp = 0;
Bit32s CPU_CycleDown = 0;
Bit64s CPU_IODelayRemoved = 0;
CPU_Decoder * cpudecoder;
bool CPU_CycleAutoAdjust;
Bitu CPU_AutoDetermineMode;
bool CPU_CycleAutoAdjust = false;
bool CPU_SkipCycleAutoAdjust = false;
Bitu CPU_AutoDetermineMode = 0;
void CPU_Core_Full_Init(void);
void CPU_Core_Normal_Init(void);
@ -2074,6 +2075,29 @@ static void CPU_CycleDecrease(bool pressed) {
}
}
void CPU_Enable_SkipAutoAdjust(void) {
if (CPU_CycleAutoAdjust) {
CPU_CycleMax /= 2;
if (CPU_CycleMax < CPU_CYCLES_LOWER_LIMIT)
CPU_CycleMax = CPU_CYCLES_LOWER_LIMIT;
}
CPU_SkipCycleAutoAdjust=true;
}
void CPU_Disable_SkipAutoAdjust(void) {
CPU_SkipCycleAutoAdjust=false;
}
extern Bit32s ticksDone;
extern Bit32u ticksScheduled;
void CPU_Reset_AutoAdjust(void) {
CPU_IODelayRemoved = 0;
ticksDone = 0;
ticksScheduled = 0;
}
class CPU: public Module_base {
private:
static bool inited;
@ -2138,6 +2162,7 @@ public:
CPU_AutoDetermineMode=CPU_AUTODETERMINE_NONE;
CPU_CycleLeft=0;//needed ?
CPU_Cycles=0;
CPU_SkipCycleAutoAdjust=false;
std::string str;
CommandLine cmd(0,section->Get_string("cycles"));