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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "DurationQueryHelper.hpp"
namespace Diligent
{
DurationQueryHelper::DurationQuery::DurationQuery(IRenderDevice* pDevice)
{
QueryDesc queryDesc{QUERY_TYPE_TIMESTAMP};
queryDesc.Name = "Duration start timestamp query";
pDevice->CreateQuery(queryDesc, &StartTimestamp);
VERIFY(StartTimestamp, "Failed to create start query");
queryDesc.Name = "Duration end timestamp query";
pDevice->CreateQuery(queryDesc, &EndTimestamp);
VERIFY(EndTimestamp, "Failed to create end query");
}
DurationQueryHelper::DurationQueryHelper(IRenderDevice* pDevice,
Uint32 NumQueriesToReserve,
Uint32 ExpectedQueryLimit) :
m_pDevice{pDevice},
m_ExpectedQueryLimit{ExpectedQueryLimit}
{
m_AvailableQueries.reserve(NumQueriesToReserve);
for (Uint32 i = 0; i < NumQueriesToReserve; ++i)
{
m_AvailableQueries.emplace_back(pDevice);
}
}
void DurationQueryHelper::Begin(IDeviceContext* pCtx)
{
if (m_AvailableQueries.empty())
{
m_AvailableQueries.emplace_back(m_pDevice);
}
auto DurationQuery = std::move(m_AvailableQueries.back());
m_AvailableQueries.pop_back();
pCtx->EndQuery(DurationQuery.StartTimestamp);
m_PendingQueries.push_front(std::move(DurationQuery));
}
bool DurationQueryHelper::End(IDeviceContext* pCtx, double& Duration)
{
if (m_PendingQueries.empty())
{
LOG_ERROR_MESSAGE("There are no pending queries, which likely indicates incosistent Begin()/End() calls");
return false;
}
if (m_PendingQueries.size() > m_ExpectedQueryLimit)
{
LOG_WARNING_MESSAGE("There are ", m_PendingQueries.size(), " pending queries which exceeds the specified expected limit (", m_ExpectedQueryLimit, ")");
}
pCtx->EndQuery(m_PendingQueries.front().EndTimestamp);
auto& LastQuery = m_PendingQueries.back();
QueryDataTimestamp StartTimestampData;
// Do not invalidate the query until we also get end timestamp
auto DataAvailable = LastQuery.StartTimestamp->GetData(&StartTimestampData, sizeof(StartTimestampData), false);
if (DataAvailable)
{
QueryDataTimestamp EndTimestampData;
DataAvailable = LastQuery.EndTimestamp->GetData(&EndTimestampData, sizeof(EndTimestampData));
if (DataAvailable)
{
LastQuery.StartTimestamp->Invalidate();
Duration =
static_cast<double>(EndTimestampData.Counter) / static_cast<double>(EndTimestampData.Frequency) -
static_cast<double>(StartTimestampData.Counter) / static_cast<double>(StartTimestampData.Frequency);
}
m_AvailableQueries.emplace_back(std::move(LastQuery));
m_PendingQueries.pop_back();
}
return DataAvailable;
}
} // namespace Diligent
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