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Process all data available in ring buffers.

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This commit is contained in:
Bartosz Taudul 2021-06-10 02:07:29 +02:00
parent 5b7cd06840
commit ca2130d56c
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GPG Key ID: B7FE2008B7575DF3
2 changed files with 137 additions and 128 deletions
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13
client/TracyRingBuffer.hpp
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@ -59,12 +59,6 @@ public:
ioctl( m_fd, PERF_EVENT_IOC_ENABLE, 0 ); ioctl( m_fd, PERF_EVENT_IOC_ENABLE, 0 );
} }
bool HasData() const
{
const auto head = LoadHead();
return head > m_tail;
}
void Read( void* dst, uint64_t offset, uint64_t cnt ) void Read( void* dst, uint64_t offset, uint64_t cnt )
{ {
auto src = ( m_tail + offset ) % Size; auto src = ( m_tail + offset ) % Size;
@ -100,12 +94,17 @@ public:
return ( quot << m_metadata->time_shift ) + ( rem << m_metadata->time_shift ) / m_metadata->time_mult; return ( quot << m_metadata->time_shift ) + ( rem << m_metadata->time_shift ) / m_metadata->time_mult;
} }
private:
uint64_t LoadHead() const uint64_t LoadHead() const
{ {
return std::atomic_load_explicit( (const volatile std::atomic<uint64_t>*)&m_metadata->data_head, std::memory_order_acquire ); return std::atomic_load_explicit( (const volatile std::atomic<uint64_t>*)&m_metadata->data_head, std::memory_order_acquire );
} }
uint64_t GetTail() const
{
return m_tail;
}
private:
void StoreTail() void StoreTail()
{ {
std::atomic_store_explicit( (volatile std::atomic<uint64_t>*)&m_metadata->data_tail, m_tail, std::memory_order_release ); std::atomic_store_explicit( (volatile std::atomic<uint64_t>*)&m_metadata->data_tail, m_tail, std::memory_order_release );

18
client/TracySysTrace.cpp
View File

@ -933,14 +933,21 @@ static void SetupSampling( int64_t& samplingPeriod )
for( int i=0; i<s_numBuffers; i++ ) for( int i=0; i<s_numBuffers; i++ )
{ {
if( !traceActive.load( std::memory_order_relaxed ) ) break; if( !traceActive.load( std::memory_order_relaxed ) ) break;
if( !s_ring[i].HasData() ) continue; const auto head = s_ring[i].LoadHead();
const auto tail = s_ring[i].GetTail();
if( head == tail ) continue;
assert( head > tail );
hadData = true; hadData = true;
const auto end = head - tail;
uint64_t pos = 0;
while( pos < end )
{
perf_event_header hdr; perf_event_header hdr;
s_ring[i].Read( &hdr, 0, sizeof( perf_event_header ) ); s_ring[i].Read( &hdr, pos, sizeof( perf_event_header ) );
if( hdr.type == PERF_RECORD_SAMPLE ) if( hdr.type == PERF_RECORD_SAMPLE )
{ {
auto offset = sizeof( perf_event_header ); auto offset = pos + sizeof( perf_event_header );
const auto id = s_ring[i].GetId(); const auto id = s_ring[i].GetId();
if( id == EventCallstack ) if( id == EventCallstack )
{ {
@ -1068,7 +1075,10 @@ static void SetupSampling( int64_t& samplingPeriod )
} }
} }
} }
s_ring[i].Advance( hdr.size ); pos += hdr.size;
}
assert( pos == end );
s_ring[i].Advance( end );
} }
if( !traceActive.load( std::memory_order_relaxed) ) break; if( !traceActive.load( std::memory_order_relaxed) ) break;
if( !hadData ) if( !hadData )