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Simplify delay calibration.

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This commit is contained in:
Bartosz Taudul 2019-10-20 22:13:29 +02:00
parent 411e4d42ac
commit 909503403b
1 changed files with 4 additions and 41 deletions
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45
client/TracyProfiler.cpp
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@ -2196,51 +2196,14 @@ void Profiler::CalibrateTimer()
#endif
}
class FakeZone
{
public:
FakeZone( const SourceLocationData* srcloc ) : m_id( (uint64_t)srcloc ) {}
~FakeZone() {}
private:
volatile uint64_t m_id;
};
void Profiler::CalibrateDelay()
{
enum { Iterations = 50000 };
enum { Events = Iterations * 2 }; // start + end
static_assert( Events * 2 < QueuePrealloc, "Delay calibration loop will allocate memory in queue" );
static_assert( Events < QueuePrealloc, "Delay calibration loop will allocate memory in queue" );
moodycamel::ProducerToken ptoken_detail( GetQueue() );
moodycamel::ConcurrentQueue<QueueItem>::ExplicitProducer* ptoken = GetQueue().get_explicit_producer( ptoken_detail );
for( int i=0; i<Iterations; i++ )
{
static const tracy::SourceLocationData __tracy_source_location { nullptr, __FUNCTION__, __FILE__, (uint32_t)__LINE__, 0 };
{
Magic magic;
auto& tail = ptoken->get_tail_index();
auto item = ptoken->enqueue_begin( magic );
MemWrite( &item->hdr.type, QueueType::ZoneBegin );
MemWrite( &item->zoneBegin.time, Profiler::GetTime() );
MemWrite( &item->zoneBegin.srcloc, (uint64_t)&__tracy_source_location );
tail.store( magic + 1, std::memory_order_release );
}
{
Magic magic;
auto& tail = ptoken->get_tail_index();
auto item = ptoken->enqueue_begin( magic );
MemWrite( &item->hdr.type, QueueType::ZoneEnd );
MemWrite( &item->zoneEnd.time, GetTime() );
tail.store( magic + 1, std::memory_order_release );
}
}
const auto f0 = GetTime();
for( int i=0; i<Iterations; i++ )
{
static const tracy::SourceLocationData __tracy_source_location { nullptr, __FUNCTION__, __FILE__, (uint32_t)__LINE__, 0 };
FakeZone ___tracy_scoped_zone( &__tracy_source_location );
}
const auto t0 = GetTime();
for( int i=0; i<Iterations; i++ )
{
@ -2265,8 +2228,7 @@ void Profiler::CalibrateDelay()
}
const auto t1 = GetTime();
const auto dt = t1 - t0;
const auto df = t0 - f0;
m_delay = ( dt - df ) / Events;
m_delay = dt / Events;
auto mindiff = std::numeric_limits<int64_t>::max();
for( int i=0; i<Iterations * 10; i++ )
@ -2281,7 +2243,7 @@ void Profiler::CalibrateDelay()
enum { Bulk = 1000 };
moodycamel::ConsumerToken token( GetQueue() );
int left = Events * 2;
int left = Events;
QueueItem item[Bulk];
while( left != 0 )
{
@ -2289,6 +2251,7 @@ void Profiler::CalibrateDelay()
assert( sz > 0 );
left -= (int)sz;
}
assert( GetQueue().size_approx() == 0 );
}
void Profiler::SendCallstack( int depth, const char* skipBefore )