void cleanup()
{
// Put back a "green" governor
setCPUGovernor("powersave");
closeFreqSetterFiles();
freeCoreRelations();
freeFreqInfo();
#ifdef _DUMP
closeDump();
#endif
}
void cleanup()
{
// Put back a "neutral" governor
setCPUGovernor("ondemand");
closeFreqSetterFiles();
freeCoreRelations();
freeFreqInfo();
#ifdef _DUMP
closeDump();
#endif
}
int main(int argc, char** argv)
{
struct sched_param sp;
pthread_t bgth;
if ( argc != 3 && argc != 5 )
{
usage();
return -1;
}
unsigned int coreID = 0;
unsigned int startFreq = 0;
unsigned int targetFreq = 0;
unsigned int argcCounter = 1;
// Option for core specification
if ( strcmp(argv[1],"-c")==0 )
{
if ( sscanf(argv[2],"%u",&coreID) != 1 )
{
fprintf(stderr,"Fail to get the core ID argument\n");
return -2;
}
argcCounter +=2;
if ( argc != 5 )
{
fprintf(stderr,"Missing frequencies arguments\n");
usage();
return -1;
}
}
if ( sscanf(argv[argcCounter],"%u",&startFreq) != 1 )
{
fprintf(stderr,"Fail to get the start frequency argument\n");
return -3;
}
if ( sscanf(argv[argcCounter+1],"%u",&targetFreq) != 1 )
{
fprintf(stderr,"Fail to get the target freq argument\n");
return -4;
}
// Additional checks
if ( coreID >= getCoreNumber() )
{
fprintf(stdout,"The core ID that user gave is invalid\n");
fprintf(stdout,"Core ID is set to 0\n");
coreID = 0;
}
initFreqInfo();
if ( isFreqAvailable(coreID,startFreq) == 0 )
{
fprintf(stdout,"The starting frequency that you have entered (%d) is not available for the core %d\n",startFreq,coreID);
fprintf(stdout,"Aborting");
cleanup();
return -6;
}
if ( isFreqAvailable(coreID,targetFreq) == 0 )
{
fprintf(stdout,"The target frequency that you have entered (%d) is not available for the core %d\n",targetFreq,coreID);
fprintf(stdout,"Aborting");
cleanup();
return -7;
}
initCoreRelations();
#ifdef _DUMP
openDump("./results.dump",NB_TRY_REPET_LOOP*NB_VALIDATION_REPET);
#endif
// stay on cpu 2
pinCPU(coreID);
// create a background task to keep CPU awaken
pthread_create(&bgth, NULL, thfn, NULL);
// go realtime, max prio
sched_getparam(0, &sp);
sp.sched_priority = sched_get_priority_max(SCHED_FIFO);
if (sched_setscheduler(0, SCHED_FIFO, &sp))
{
perror("setscheduler background");
}
if ( setCPUGovernor("userspace") != 0 )
{
fprintf(stderr,"We are unable to set \"userspace\" governor. Do you have cpufreq and permissions ?\n");
cleanup();
return -5;
}
// Set the minimal frequency
if ( openFreqSetterFiles() != 0 )
{
cleanup();
return -3;
}
setFreqForAllRelatedCore(coreID,getMinAvailableFreq(coreID));
runTest(startFreq, targetFreq, coreID);
// kill bg thread
pthread_cancel(bgth);
cleanup();
return 0;
}