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Parallelize calculation of per-CPU context switches.

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This commit is contained in:
Bartosz Taudul
2023-04-02 22:10:22 +02:00
parent a4c200d242
commit 2b7b79352b
5 changed files with 270 additions and 225 deletions
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server/TracyTimelineItemCpuData.cpp
+62 -1
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@@ -41,18 +41,20 @@ int64_t TimelineItemCpuData::RangeEnd() const
bool TimelineItemCpuData::DrawContents( const TimelineContext& ctx, int& offset )
{
m_view.DrawCpuData( ctx, m_cpuDraw, offset );
m_view.DrawCpuData( ctx, m_cpuDraw, m_ctxDraw, offset );
return true;
}
void TimelineItemCpuData::DrawFinished()
{
m_cpuDraw.clear();
for( auto& v : m_ctxDraw ) v.clear();
}
void TimelineItemCpuData::Preprocess( const TimelineContext& ctx, TaskDispatch& td, bool visible )
{
assert( m_cpuDraw.empty() );
for( auto& v : m_ctxDraw ) assert( v.empty() );
if( !visible ) return;
@@ -66,6 +68,65 @@ void TimelineItemCpuData::Preprocess( const TimelineContext& ctx, TaskDispatch&
PreprocessCpuUsage( ctx );
} );
}
auto cpuData = m_worker.GetCpuData();
const auto cpuCnt = m_worker.GetCpuDataCpuCount();
if( m_ctxDraw.size() != cpuCnt ) m_ctxDraw.resize( cpuCnt );
for( int i=0; i<cpuCnt; i++ )
{
auto& cs = cpuData[i].cs;
if( !cs.empty() )
{
td.Queue( [this, &ctx, &cs, i] {
PreprocessCpuCtxSwitches( ctx, cs, m_ctxDraw[i] );
} );
}
}
}
constexpr float MinVisSize = 3;
void TimelineItemCpuData::PreprocessCpuCtxSwitches( const TimelineContext& ctx, const Vector<ContextSwitchCpu>& cs, std::vector<CpuCtxDraw>& out )
{
const auto vStart = ctx.vStart;
const auto vEnd = ctx.vEnd;
const auto nspx = ctx.nspx;
auto it = std::lower_bound( cs.begin(), cs.end(), std::max<int64_t>( 0, vStart ), [this] ( const auto& l, const auto& r ) { return ( l.IsEndValid() ? l.End() : m_worker.GetLastTime() ) < r; } );
if( it == cs.end() ) return;
auto eit = std::lower_bound( it, cs.end(), vEnd, [] ( const auto& l, const auto& r ) { return l.Start() < r; } );
if( it == eit ) return;
const auto MinVisNs = int64_t( round( GetScale() * MinVisSize * nspx ) );
while( it < eit )
{
const auto end = it->IsEndValid() ? it->End() : m_worker.GetLastTime();
const auto zsz = end - it->Start();
if( zsz < MinVisNs )
{
auto nextTime = end + MinVisNs;
auto next = it + 1;
for(;;)
{
next = std::lower_bound( next, eit, nextTime, [this] ( const auto& l, const auto& r ) { return ( l.IsEndValid() ? l.End() : m_worker.GetLastTime() ) < r; } );
if( next == eit ) break;
auto prev = next - 1;
const auto pt = prev->IsEndValid() ? prev->End() : m_worker.GetLastTime();
const auto nt = next->IsEndValid() ? next->End() : m_worker.GetLastTime();
if( nt - pt >= MinVisNs ) break;
nextTime = nt + MinVisNs;
}
out.emplace_back( CpuCtxDraw { uint32_t( it - cs.begin() ), uint32_t( next - it ) } );
it = next;
}
else
{
out.emplace_back( CpuCtxDraw { uint32_t( it - cs.begin() ), 0 } );
++it;
}
}
}
void TimelineItemCpuData::PreprocessCpuUsage( const TimelineContext& ctx )