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https://github.com/wolfpld/tracy.git
synced 2024-09-20 05:42:18 +00:00
Sleep if sys trace pipe buffer underruns.
This commit is contained in:
Bartosz Taudul
parent
2d50d07438
commit
8f6e94d75c
@ -506,96 +506,145 @@ ssize_t getline(char **buf, size_t *bufsiz, FILE *fp)
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}
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#endif
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static void ProcessTraceLines( FILE* f )
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static void HandleTraceLine( const char* line )
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{
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size_t lsz = 1024;
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auto line = (char*)malloc( lsz );
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line += 24;
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const auto cpu = (uint8_t)ReadNumber( line );
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for(;;)
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{
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auto rd = getline( &line, &lsz, f );
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if( rd < 0 ) break;
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#ifdef TRACY_ON_DEMAND
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if( !GetProfiler().IsConnected() ) continue;
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#endif
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const char* ptr = line + 24;
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const auto cpu = (uint8_t)ReadNumber( ptr );
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ptr++; // ']'
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while( *ptr == ' ' ) ptr++;
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line++; // ']'
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while( *line == ' ' ) line++;
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#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
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const auto time = ReadNumber( ptr );
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const auto time = ReadNumber( line );
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#elif __ARM_ARCH >= 6
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const auto ts = ReadNumber( ptr );
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ptr++; // '.'
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const auto tus = ReadNumber( ptr );
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const auto time = ts * 1000000000ll + tus * 1000ll;
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const auto ts = ReadNumber( line );
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line++; // '.'
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const auto tus = ReadNumber( line );
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const auto time = ts * 1000000000ll + tus * 1000ll;
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#endif
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ptr += 2; // ': '
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if( memcmp( ptr, "sched_switch", 12 ) == 0 )
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{
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ptr += 14;
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line += 2; // ': '
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if( memcmp( line, "sched_switch", 12 ) == 0 )
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{
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line += 14;
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while( memcmp( ptr, "prev_pid", 8 ) != 0 ) ptr++;
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ptr += 9;
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while( memcmp( line, "prev_pid", 8 ) != 0 ) line++;
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line += 9;
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const auto oldPid = ReadNumber( ptr );
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ptr++;
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const auto oldPid = ReadNumber( line );
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line++;
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while( memcmp( ptr, "prev_state", 10 ) != 0 ) ptr++;
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ptr += 11;
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while( memcmp( line, "prev_state", 10 ) != 0 ) line++;
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line += 11;
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const auto oldState = (uint8_t)ReadState( *ptr );
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ptr += 5;
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const auto oldState = (uint8_t)ReadState( *line );
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line += 5;
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while( memcmp( ptr, "next_pid", 8 ) != 0 ) ptr++;
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ptr += 9;
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while( memcmp( line, "next_pid", 8 ) != 0 ) line++;
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line += 9;
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const auto newPid = ReadNumber( ptr );
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const auto newPid = ReadNumber( line );
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uint8_t reason = 100;
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uint8_t reason = 100;
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Magic magic;
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auto token = GetToken();
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auto& tail = token->get_tail_index();
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auto item = token->enqueue_begin( magic );
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MemWrite( &item->hdr.type, QueueType::ContextSwitch );
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MemWrite( &item->contextSwitch.time, time );
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MemWrite( &item->contextSwitch.oldThread, oldPid );
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MemWrite( &item->contextSwitch.newThread, newPid );
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MemWrite( &item->contextSwitch.cpu, cpu );
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MemWrite( &item->contextSwitch.reason, reason );
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MemWrite( &item->contextSwitch.state, oldState );
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tail.store( magic + 1, std::memory_order_release );
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}
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else if( memcmp( ptr, "sched_wakeup", 12 ) == 0 )
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{
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ptr += 14;
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while( memcmp( ptr, "pid", 3 ) != 0 ) ptr++;
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ptr += 4;
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const auto pid = ReadNumber( ptr );
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Magic magic;
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auto token = GetToken();
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auto& tail = token->get_tail_index();
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auto item = token->enqueue_begin( magic );
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MemWrite( &item->hdr.type, QueueType::ThreadWakeup );
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MemWrite( &item->threadWakeup.time, time );
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MemWrite( &item->threadWakeup.thread, pid );
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tail.store( magic + 1, std::memory_order_release );
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}
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Magic magic;
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auto token = GetToken();
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auto& tail = token->get_tail_index();
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auto item = token->enqueue_begin( magic );
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MemWrite( &item->hdr.type, QueueType::ContextSwitch );
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MemWrite( &item->contextSwitch.time, time );
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MemWrite( &item->contextSwitch.oldThread, oldPid );
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MemWrite( &item->contextSwitch.newThread, newPid );
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MemWrite( &item->contextSwitch.cpu, cpu );
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MemWrite( &item->contextSwitch.reason, reason );
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MemWrite( &item->contextSwitch.state, oldState );
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tail.store( magic + 1, std::memory_order_release );
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}
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else if( memcmp( line, "sched_wakeup", 12 ) == 0 )
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{
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line += 14;
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free( line );
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while( memcmp( line, "pid", 3 ) != 0 ) line++;
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line += 4;
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const auto pid = ReadNumber( line );
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Magic magic;
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auto token = GetToken();
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auto& tail = token->get_tail_index();
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auto item = token->enqueue_begin( magic );
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MemWrite( &item->hdr.type, QueueType::ThreadWakeup );
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MemWrite( &item->threadWakeup.time, time );
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MemWrite( &item->threadWakeup.thread, pid );
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tail.store( magic + 1, std::memory_order_release );
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}
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}
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#ifdef __ANDROID__
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static void ProcessTraceLines( int fd )
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{
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// Linux pipe buffer is 64KB, additional 1KB is for unfinished lines
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char* buf = (char*)tracy_malloc( (64+1)*1024 );
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char* line = buf;
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for(;;)
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{
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const auto rd = read( fd, line, 64*1024 );
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if( rd <= 0 ) break;
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#ifdef TRACY_ON_DEMAND
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if( !GetProfiler().IsConnected() )
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{
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if( rd < 64*1024 )
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{
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assert( line[rd-1] == '\n' );
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line = buf;
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std::this_thread::sleep_for( std::chrono::milliseconds( 10 ) );
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}
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else
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{
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const auto end = line + rd;
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line = end - 1;
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while( line > buf && *line != '\n' ) line--;
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if( line > buf )
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{
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line++;
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const auto lsz = end - line;
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memmove( buf, line, lsz );
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line = buf + lsz;
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}
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}
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continue;
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}
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#endif
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const auto end = line + rd;
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line = buf;
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for(;;)
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{
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auto next = line;
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while( next < end && *next != '\n' ) next++;
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next++;
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if( next >= end )
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{
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const auto lsz = end - line;
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memmove( buf, line, lsz );
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line = buf + lsz;
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break;
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}
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HandleTraceLine( line );
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line = next;
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}
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if( rd < 64*1024 )
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{
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std::this_thread::sleep_for( std::chrono::milliseconds( 10 ) );
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}
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}
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tracy_free( buf );
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}
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void SysTraceWorker( void* ptr )
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{
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SetThreadName( "Tracy SysTrace" );
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@ -619,14 +668,32 @@ void SysTraceWorker( void* ptr )
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{
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// parent
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close( pipefd[1] );
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FILE* f = fdopen( pipefd[0], "rb" );
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if( !f ) return;
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ProcessTraceLines( f );
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fclose( f );
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ProcessTraceLines( pipefd[0] );
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close( pipefd[0] );
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}
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}
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}
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#else
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static void ProcessTraceLines( FILE* f )
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{
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size_t lsz = 1024;
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auto line = (char*)malloc( lsz );
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for(;;)
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{
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auto rd = getline( &line, &lsz, f );
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if( rd < 0 ) break;
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#ifdef TRACY_ON_DEMAND
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if( !GetProfiler().IsConnected() ) continue;
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#endif
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HandleTraceLine( line );
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}
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free( line );
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}
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void SysTraceWorker( void* ptr )
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{
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SetThreadName( "Tracy SysTrace" );
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