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Restore TSC usage on Linux.

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This commit is contained in:
Bartosz Taudul 2020-08-13 01:41:05 +02:00
parent c0c9832713
commit 9258e2ced0
2 changed files with 31 additions and 2 deletions
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2
client/TracyProfiler.hpp
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@ -25,7 +25,7 @@
# include <mach/mach_time.h>
#endif
#if defined _WIN32 || defined __CYGWIN__ || ( ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 ) && !defined __linux__ ) || ( defined TARGET_OS_IOS && TARGET_OS_IOS == 1 )
#if defined _WIN32 || defined __CYGWIN__ || ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 ) || ( defined TARGET_OS_IOS && TARGET_OS_IOS == 1 )
# define TRACY_HW_TIMER
#endif

31
client/TracySysTrace.cpp
View File

@ -627,6 +627,10 @@ static int perf_event_open( struct perf_event_attr* hw_event, pid_t pid, int cpu
static void SetupSampling( int64_t& samplingPeriod )
{
#ifndef CLOCK_MONOTONIC_RAW
return;
#endif
samplingPeriod = 100*1000;
s_numCpus = (int)std::thread::hardware_concurrency();
@ -645,8 +649,8 @@ static void SetupSampling( int64_t& samplingPeriod )
pe.disabled = 1;
pe.freq = 1;
#if !defined TRACY_HW_TIMER || !( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
pe.use_clockid = 1;
#ifdef CLOCK_MONOTONIC_RAW
pe.clockid = CLOCK_MONOTONIC_RAW;
#endif
@ -669,6 +673,19 @@ static void SetupSampling( int64_t& samplingPeriod )
sched_param sp = { 5 };
pthread_setschedparam( pthread_self(), SCHED_FIFO, &sp );
uint32_t currentPid = (uint32_t)getpid();
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
for( int i=0; i<s_numCpus; i++ )
{
if( !s_ring[i].CheckTscCaps() )
{
for( int j=0; j<s_numCpus; j++ ) s_ring[j].~RingBuffer();
tracy_free( s_ring );
const char* err = "Tracy Profiler: sampling is disabled due to non-native scheduler clock. Are you running under a VM?";
Profiler::MessageAppInfo( err, strlen( err ) );
return;
}
}
#endif
for( int i=0; i<s_numCpus; i++ ) s_ring[i].Enable();
for(;;)
{
@ -721,6 +738,10 @@ static void SetupSampling( int64_t& samplingPeriod )
}
memcpy( trace, &cnt, sizeof( uint64_t ) );
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
t0 = s_ring[i].ConvertTimeToTsc( t0 );
#endif
TracyLfqPrepare( QueueType::CallstackSample );
MemWrite( &item->callstackSampleFat.time, t0 );
MemWrite( &item->callstackSampleFat.thread, (uint64_t)tid );
@ -827,7 +848,11 @@ bool SysTraceStart( int64_t& samplingPeriod )
TraceWrite( TraceOptions, sizeof( TraceOptions ), "norecord-tgid", 14 );
TraceWrite( TraceOptions, sizeof( TraceOptions ), "noirq-info", 11 );
TraceWrite( TraceOptions, sizeof( TraceOptions ), "noannotate", 11 );
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
if( !TraceWrite( TraceClock, sizeof( TraceClock ), "x86-tsc", 8 ) ) return false;
#else
if( !TraceWrite( TraceClock, sizeof( TraceClock ), "mono_raw", 9 ) ) return false;
#endif
if( !TraceWrite( SchedSwitch, sizeof( SchedSwitch ), "1", 2 ) ) return false;
if( !TraceWrite( SchedWakeup, sizeof( SchedWakeup ), "1", 2 ) ) return false;
if( !TraceWrite( BufferSizeKb, sizeof( BufferSizeKb ), "4096", 5 ) ) return false;
@ -971,10 +996,14 @@ static void HandleTraceLine( const char* line )
line++; // ']'
while( *line == ' ' ) line++;
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
const auto time = ReadNumber( line );
#else
const auto ts = ReadNumber( line );
line++; // '.'
const auto tus = ReadNumber( line );
const auto time = ts * 1000000000ll + tus * 1000ll;
#endif
line += 2; // ': '
if( memcmp( line, "sched_switch", 12 ) == 0 )