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Implement automatic GPU clock drift calculation.

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This commit is contained in:
Bartosz Taudul 2019-08-04 00:23:23 +02:00
parent 401b879ece
commit a642abfde0
1 changed files with 39 additions and 1 deletions
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40
server/TracyView.cpp
View File

@ -5264,6 +5264,7 @@ void View::DrawOptions()
{
for( size_t i=0; i<gpuData.size(); i++ )
{
const auto& timeline = gpuData[i]->timeline;
const bool isVulkan = gpuData[i]->thread == 0;
char buf[1024];
if( isVulkan )
@ -5276,10 +5277,47 @@ void View::DrawOptions()
}
SmallCheckbox( buf, &Vis( gpuData[i] ).visible );
ImGui::SameLine();
ImGui::TextDisabled( "%s top level zones", RealToString( gpuData[i]->timeline.size(), true ) );
ImGui::TextDisabled( "%s top level zones", RealToString( timeline.size(), true ) );
ImGui::TreePush();
auto& drift = GpuDrift( gpuData[i] );
ImGui::SetNextItemWidth( 120 );
ImGui::InputInt( "Drift (ns/s)", &drift );
if( timeline.size() > 1 )
{
ImGui::SameLine();
#ifdef TRACY_EXTENDED_FONT
if( ImGui::Button( ICON_FA_ROBOT " Auto" ) )
#else
if( ImGui::Button( "Auto" ) )
#endif
{
double gsum = 0;
size_t lastidx = 0;
for( size_t j=0; j<timeline.size(); j++ )
{
if( timeline[j]->gpuEnd >= 0 )
{
lastidx = j;
gsum += timeline[j]->gpuStart - timeline[j]->cpuStart;
}
}
if( lastidx > 0 )
{
const double cavg = ( timeline[lastidx]->cpuStart + timeline.front()->cpuStart ) * 0.5;
const double gavg = gsum / double( lastidx );
double cov = 0;
double var = 0;
for( size_t j=0; j<lastidx; j++ )
{
const auto csub = timeline[j]->cpuStart - cavg;
cov += csub * ( timeline[j]->gpuStart - timeline[j]->cpuStart - gavg );
var += csub * csub;
}
const double beta = cov / var;
drift = int( 1000000000 * -beta );
}
}
}
ImGui::TreePop();
}
ImGui::TreePop();