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/*
* Copyright (c) 2008-2018, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#include "GPUTimers.h"
#include <assert.h>
#ifndef SAFE_RELEASE
#define SAFE_RELEASE(p) { if (p) { (p)->Release(); (p)=NULL; } }
#endif
#ifndef SAFE_D3D_CALL
#define SAFE_D3D_CALL(x) { if (x != S_OK) assert(0); }
#endif
//--------------------------------------------------------------------------------
void GPUTimers::Create(ID3D11Device* pD3DDevice, UINT NumTimers)
{
m_Timers.resize(NumTimers);
D3D11_QUERY_DESC queryDesc;
queryDesc.MiscFlags = 0;
queryDesc.Query = D3D11_QUERY_TIMESTAMP_DISJOINT;
SAFE_D3D_CALL( pD3DDevice->CreateQuery(&queryDesc, &m_pDisjointTimestampQuery) );
m_DisjointQueryInFlight = false;
queryDesc.Query = D3D11_QUERY_TIMESTAMP;
for (UINT i = 0; i < m_Timers.size(); ++i)
{
SAFE_D3D_CALL( pD3DDevice->CreateQuery(&queryDesc, &m_Timers[i].pGPUTimersBegin) );
SAFE_D3D_CALL( pD3DDevice->CreateQuery(&queryDesc, &m_Timers[i].pGPUTimersEnd) );
m_Timers[i].TimestampQueryInFlight = false;
}
}
//--------------------------------------------------------------------------------
void GPUTimers::Release()
{
SAFE_RELEASE(m_pDisjointTimestampQuery);
for (UINT i = 0; i < m_Timers.size(); ++i)
{
SAFE_RELEASE(m_Timers[i].pGPUTimersBegin);
SAFE_RELEASE(m_Timers[i].pGPUTimersEnd);
}
m_Timers.clear();
}
//--------------------------------------------------------------------------------
void GPUTimers::BeginFrame(ID3D11DeviceContext* pDeviceContext)
{
if (!m_DisjointQueryInFlight)
{
pDeviceContext->Begin(m_pDisjointTimestampQuery);
}
}
//--------------------------------------------------------------------------------
void GPUTimers::EndFrame(ID3D11DeviceContext* pDeviceContext)
{
if (!m_DisjointQueryInFlight)
{
pDeviceContext->End(m_pDisjointTimestampQuery);
}
m_DisjointQueryInFlight = true;
D3D11_QUERY_DATA_TIMESTAMP_DISJOINT disjointTimestampValue;
if (pDeviceContext->GetData(m_pDisjointTimestampQuery, &disjointTimestampValue, sizeof(disjointTimestampValue), D3D11_ASYNC_GETDATA_DONOTFLUSH) == S_OK)
{
m_DisjointQueryInFlight = false;
if (!disjointTimestampValue.Disjoint)
{
double InvFrequencyMS = 1000.0 / disjointTimestampValue.Frequency;
for (UINT i = 0; i < m_Timers.size(); ++i)
{
if (m_Timers[i].TimestampQueryInFlight)
{
UINT64 TimestampValueBegin;
UINT64 TimestampValueEnd;
if ((pDeviceContext->GetData(m_Timers[i].pGPUTimersBegin, &TimestampValueBegin, sizeof(UINT64), D3D11_ASYNC_GETDATA_DONOTFLUSH) == S_OK) &&
(pDeviceContext->GetData(m_Timers[i].pGPUTimersEnd, &TimestampValueEnd, sizeof(UINT64), D3D11_ASYNC_GETDATA_DONOTFLUSH) == S_OK))
{
m_Timers[i].TimestampQueryInFlight = false;
m_Timers[i].GPUTimeInMS = float(double(TimestampValueEnd - TimestampValueBegin) * InvFrequencyMS);
}
}
else
{
m_Timers[i].GPUTimeInMS = 0.f;
}
}
}
}
}
//--------------------------------------------------------------------------------
void GPUTimers::StartTimer(ID3D11DeviceContext* pDeviceContext, UINT i)
{
if (!m_Timers[i].TimestampQueryInFlight)
{
pDeviceContext->End(m_Timers[i].pGPUTimersBegin);
}
}
//--------------------------------------------------------------------------------
void GPUTimers::StopTimer(ID3D11DeviceContext* pDeviceContext, UINT i)
{
if (!m_Timers[i].TimestampQueryInFlight)
{
pDeviceContext->End(m_Timers[i].pGPUTimersEnd);
}
m_Timers[i].TimestampQueryInFlight = true;
}
//--------------------------------------------------------------------------------
float GPUTimers::GetGPUTimeInMS(UINT i)
{
if (i < m_Timers.size())
{
return m_Timers[i].GPUTimeInMS;
}
assert(0);
return 0.f;
}
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