U64 LLFastTimer::countsPerSecond()
{
if (!sCPUClockFrequency)
{
CProcessor proc;
sCPUClockFrequency = proc.GetCPUFrequency(50);
}
return U64(sCPUClockFrequency);
}
LLCPUInfo::LLCPUInfo()
{
std::ostringstream out;
CProcessor proc;
const ProcessorInfo* info = proc.GetCPUInfo();
// proc.WriteInfoTextFile("procInfo.txt");
mHasSSE = info->_Ext.SSE_StreamingSIMD_Extensions;
mHasSSE2 = info->_Ext.SSE2_StreamingSIMD2_Extensions;
mHasAltivec = info->_Ext.Altivec_Extensions;
mCPUMhz = (S32)(proc.GetCPUFrequency(50)/1000000.0);
mFamily.assign( info->strFamily );
mCPUString = "Unknown";
#if LL_WINDOWS || LL_DARWIN || LL_SOLARIS
out << proc.strCPUName;
if (200 < mCPUMhz && mCPUMhz < 10000) // *NOTE: cpu speed is often way wrong, do a sanity check
{
out << " (" << mCPUMhz << " MHz)";
}
mCPUString = out.str();
#elif LL_LINUX
std::map< std::string, std::string > cpuinfo;
LLFILE* cpuinfo_fp = LLFile::fopen(CPUINFO_FILE, "rb");
if(cpuinfo_fp)
{
char line[MAX_STRING];
memset(line, 0, MAX_STRING);
while(fgets(line, MAX_STRING, cpuinfo_fp))
{
// /proc/cpuinfo on Linux looks like:
// name\t*: value\n
char* tabspot = strchr( line, '\t' );
if (tabspot == NULL)
continue;
char* colspot = strchr( tabspot, ':' );
if (colspot == NULL)
continue;
char* spacespot = strchr( colspot, ' ' );
if (spacespot == NULL)
continue;
char* nlspot = strchr( line, '\n' );
if (nlspot == NULL)
nlspot = line + strlen( line ); // Fallback to terminating NUL
std::string linename( line, tabspot );
std::string llinename(linename);
LLStringUtil::toLower(llinename);
std::string lineval( spacespot + 1, nlspot );
cpuinfo[ llinename ] = lineval;
}
fclose(cpuinfo_fp);
}
# if LL_X86
std::string flags = " " + cpuinfo["flags"] + " ";
LLStringUtil::toLower(flags);
mHasSSE = ( flags.find( " sse " ) != std::string::npos );
mHasSSE2 = ( flags.find( " sse2 " ) != std::string::npos );
F64 mhz;
if (LLStringUtil::convertToF64(cpuinfo["cpu mhz"], mhz)
&& 200.0 < mhz && mhz < 10000.0)
{
mCPUMhz = (S32)llrint(mhz);
}
if (!cpuinfo["model name"].empty())
mCPUString = cpuinfo["model name"];
# endif // LL_X86
#endif // LL_LINUX
}