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Implement getting CPU usage in linux.

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This commit is contained in:
Bartosz Taudul 2019-02-24 19:02:49 +01:00
parent 0c75a5178c
commit bafc8a1330
2 changed files with 41 additions and 24 deletions
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59
client/TracySysTime.cpp
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@ -4,6 +4,10 @@
# if defined _WIN32 || defined __CYGWIN__ # if defined _WIN32 || defined __CYGWIN__
# include <windows.h> # include <windows.h>
# elif defined __linux__
# include <assert.h>
# include <stdio.h>
# include <inttypes.h>
# endif # endif
namespace tracy namespace tracy
@ -16,7 +20,7 @@ static inline uint64_t ConvertTime( const FILETIME& t )
return ( uint64_t( t.dwHighDateTime ) << 32 ) | uint64_t( t.dwLowDateTime ); return ( uint64_t( t.dwHighDateTime ) << 32 ) | uint64_t( t.dwLowDateTime );
} }
SysTime::SysTime() void SysTime::ReadTimes()
{ {
FILETIME idleTime; FILETIME idleTime;
FILETIME kernelTime; FILETIME kernelTime;
@ -30,29 +34,42 @@ SysTime::SysTime()
used = kernel + user; used = kernel + user;
} }
float SysTime::Get() # elif defined __linux__
void SysTime::ReadTimes()
{ {
FILETIME idleTime; uint64_t user, nice, system;
FILETIME kernelTime; FILE* f = fopen( "/proc/stat", "r" );
FILETIME userTime; assert( f );
fscanf( f, "cpu %" PRIu64 " %" PRIu64 " %" PRIu64" %" PRIu64, &user, &nice, &system, &idle );
GetSystemTimes( &idleTime, &kernelTime, &userTime ); fclose( f );
used = user + nice + system;
const auto newIdle = ConvertTime( idleTime );
const auto kernel = ConvertTime( kernelTime );
const auto user = ConvertTime( userTime );
const auto newUsed = kernel + user;
const auto diffIdle = newIdle - idle;
const auto diffUsed = newUsed - used;
idle = newIdle;
used = newUsed;
return diffUsed == 0 ? 0 : ( diffUsed - diffIdle ) * 100.f / diffUsed;
} }
# endif #endif
SysTime::SysTime()
{
ReadTimes();
}
float SysTime::Get()
{
const auto oldUsed = used;
const auto oldIdle = idle;
ReadTimes();
const auto diffIdle = idle - oldIdle;
const auto diffUsed = used - oldUsed;
#if defined _WIN32 || defined __CYGWIN__
return diffUsed == 0 ? 0 : ( diffUsed - diffIdle ) * 100.f / diffUsed;
#elif defined __linux__
const auto total = diffUsed + diffIdle;
return total == 0 ? 0 : diffUsed * 100.f / total;
#endif
}
} }

6
client/TracySysTime.hpp
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@ -1,7 +1,7 @@
#ifndef __TRACYSYSTIME_HPP__ #ifndef __TRACYSYSTIME_HPP__
#define __TRACYSYSTIME_HPP__ #define __TRACYSYSTIME_HPP__
#if defined _WIN32 || defined __CYGWIN__ #if defined _WIN32 || defined __CYGWIN__ || defined __linux__
# define TRACY_HAS_SYSTIME # define TRACY_HAS_SYSTIME
#endif #endif
@ -18,10 +18,10 @@ public:
SysTime(); SysTime();
float Get(); float Get();
void ReadTimes();
private: private:
# if defined _WIN32 || defined __CYGWIN__
uint64_t idle, used; uint64_t idle, used;
# endif
}; };
} }