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Don't eat extra cycles when idling.

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Rescheduling between threads takes about 3000 cycles, but that's not true
for both sides of e.g. a delay.

Fixes #6409 (assuming 60fps is what a PSP gets.)
This commit is contained in:
Unknown W. Brackets committed 2014-06-23 23:02:46 -07:00
1 parent cc269488b2
commit 118736ff75
1 file changed
+9 -3
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Core/HLE/sceKernelThread.cpp
+9 -3
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@@ -3216,9 +3216,9 @@ void __KernelSwitchContext(Thread *target, const char *reason)
else
__SetCurrentThread(NULL, 0, NULL);
const bool fromIdle = oldUID == threadIdleID[0] || oldUID == threadIdleID[1];
const bool toIdle = currentThread == threadIdleID[0] || currentThread == threadIdleID[1];
#if DEBUG_LEVEL <= MAX_LOGLEVEL || DEBUG_LOG == NOTICE_LOG
bool fromIdle = oldUID == threadIdleID[0] || oldUID == threadIdleID[1];
bool toIdle = currentThread == threadIdleID[0] || currentThread == threadIdleID[1];
if (!(fromIdle && toIdle))
{
u64 nowCycles = CoreTiming::GetTicks();
@@ -3235,7 +3235,13 @@ void __KernelSwitchContext(Thread *target, const char *reason)
#endif
// Switching threads eats some cycles. This is a low approximation.
currentMIPS->downcount -= 3000;
if (fromIdle && toIdle) {
// Don't eat any cycles going between idle.
} else if (fromIdle || toIdle) {
currentMIPS->downcount -= 1500;
} else {
currentMIPS->downcount -= 3000;
}
if (target)
{