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[c-host] DXGI profiled and tuned again :)

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This commit is contained in:
Geoffrey McRae
2019-12-15 16:20:07 +11:00
parent 85d46ed2b0
commit f85c017184
3 changed files with 113 additions and 71 deletions
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13
c-host/platform/Windows/src/platform.c
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@@ -69,6 +69,10 @@ struct osThreadHandle
int resultCode;
};
// undocumented API to adjust the system timer resolution (yes, its a nasty hack)
typedef NTSTATUS (__stdcall *ZwSetTimerResolution_t)(ULONG RequestedResolution, BOOLEAN Set, PULONG ActualResolution);
static ZwSetTimerResolution_t ZwSetTimerResolution = NULL;
LRESULT CALLBACK DummyWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
@@ -307,6 +311,15 @@ bool app_init()
// always flush stderr
setbuf(stderr, NULL);
// Increase the timer resolution
ZwSetTimerResolution = (ZwSetTimerResolution_t)GetProcAddress(GetModuleHandle("ntdll.dll"), "ZwSetTimerResolution");
if (ZwSetTimerResolution)
{
ULONG actualResolution;
ZwSetTimerResolution(1, true, &actualResolution);
DEBUG_INFO("System timer resolution: %.2f ns", (float)actualResolution / 100.0f);
}
HDEVINFO deviceInfoSet;
PSP_DEVICE_INTERFACE_DETAIL_DATA infData = NULL;
SP_DEVICE_INTERFACE_DATA deviceInterfaceData;