void Processor::K10PerformanceCounters::perfMonitorDCMA(class Processor *p)
{
PerformanceCounter *perfCounter;
DWORD cpuIndex, nodeId, coreId;
PROCESSORMASK cpuMask;
unsigned int perfCounterSlot;
uint64_t misses;
// This pointers will refer an array containing previous performance counter values
uint64_t *prevPerfCounters;
try {
p->setNode(p->ALL_NODES);
p->setCore(p->ALL_CORES);
cpuMask = p->getMask();
/* We do this to do some "caching" of the mask, instead of calculating each time
we need to retrieve the time stamp counter */
// Allocating space for previous values of counters.
prevPerfCounters = (uint64_t *) calloc(
p->getProcessorCores() * p->getProcessorNodes(),
sizeof(uint64_t));
//Creates a new performance counter, for now we set slot 0, but we will
//use the findAvailable slot method to find an available method to be used
perfCounter = new PerformanceCounter(cpuMask, 0, p->getMaxSlots());
//Event 0x76 is Idle Counter
perfCounter->setEventSelect(0x47);
perfCounter->setCountOsMode(true);
perfCounter->setCountUserMode(true);
perfCounter->setCounterMask(0);
perfCounter->setEdgeDetect(false);
perfCounter->setEnableAPICInterrupt(false);
perfCounter->setInvertCntMask(false);
perfCounter->setUnitMask(0);
//Finds an available slot for our purpose
perfCounterSlot = perfCounter->findAvailableSlot();
//findAvailableSlot() returns -2 in case of error
if (perfCounterSlot == 0xfffffffe)
throw "unable to access performance counter slots";
//findAvailableSlot() returns -1 in case there aren't available slots
if (perfCounterSlot == 0xffffffff)
throw "unable to find an available performance counter slot";
printf("Performance counter will use slot #%d\n", perfCounterSlot);
//In case there are no errors, we program the object with the slot itself has found
perfCounter->setSlot(perfCounterSlot);
// Program the counter slot
if (!perfCounter->program())
throw "unable to program performance counter parameters";
// Enable the counter slot
if (!perfCounter->enable())
throw "unable to enable performance counters";
/* Here we take a snapshot of the performance counter and a snapshot of the time
* stamp counter to initialize the arrays to let them not show erratic huge numbers
* on first step
*/
if (!perfCounter->takeSnapshot())
throw "unable to retrieve performance counter data";
cpuIndex = 0;
for (nodeId = 0; nodeId < p->getProcessorNodes(); nodeId++)
{
for (coreId = 0x0; coreId < p->getProcessorCores(); coreId++)
{
prevPerfCounters[cpuIndex] = perfCounter->getCounter(cpuIndex);
cpuIndex++;
}
}
Signal::activateSignalHandler(SIGINT);
while (!Signal::getSignalStatus())
{
if (!perfCounter->takeSnapshot())
throw "unable to retrieve performance counter data";
cpuIndex = 0;
for (nodeId = 0; nodeId < p->getProcessorNodes(); nodeId++)
{
printf("Node %d -", nodeId);
for (coreId = 0x0; coreId < p->getProcessorCores(); coreId++)
{
misses = perfCounter->getCounter(cpuIndex) - prevPerfCounters[cpuIndex];
printf(" c%u:%0.3fk", coreId, (float) (misses/1000.0f));
prevPerfCounters[cpuIndex] = perfCounter->getCounter(cpuIndex);
cpuIndex++;
}
printf("\n");
}
Sleep(1000);
}
perfCounter->disable();
printf ("CTRL-C executed. Cleaning on exit...\n");
} catch (char const *str) {
if (perfCounter->getEnabled()) perfCounter->disable();
printf("K10PerformanceCounters.cpp::perfMonitorCPUUsage - %s\n", str);
}
free(perfCounter);
free(prevPerfCounters);
return;
}
void Processor::K10PerformanceCounters::perfMonitorCPUUsage(class Processor *p)
{
PerformanceCounter *perfCounter;
MSRObject *tscCounter; //We need the timestamp counter too to determine the cpu usage in percentage
DWORD cpuIndex, nodeId, coreId;
PROCESSORMASK cpuMask;
unsigned int perfCounterSlot;
uint64_t usage;
// These two pointers will refer to two arrays containing previous performance counter values
// and previous Time Stamp counters. We need these to obtain instantaneous CPU usage information
uint64_t *prevPerfCounters;
uint64_t *prevTSCCounters;
try
{
p->setNode(p->ALL_NODES);
p->setCore(p->ALL_CORES);
cpuMask = p->getMask();
/* We do this to do some "caching" of the mask, instead of calculating each time
we need to retrieve the time stamp counter */
// Allocating space for previous values of counters.
prevPerfCounters = (uint64_t *) calloc(p->getProcessorCores() * p->getProcessorNodes(), sizeof(uint64_t));
prevTSCCounters = (uint64_t *) calloc(p->getProcessorCores() * p->getProcessorNodes(), sizeof(uint64_t));
// MSR Object to retrieve the time stamp counter for all the nodes and all the processors
tscCounter = new MSRObject();
//Creates a new performance counter, for now we set slot 0, but we will
//use the findAvailable slot method to find an available method to be used
perfCounter = new PerformanceCounter(cpuMask, 0, p->getMaxSlots());
//Event 0x76 is Idle Counter
perfCounter->setEventSelect(0x76);
perfCounter->setCountOsMode(true);
perfCounter->setCountUserMode(true);
perfCounter->setCounterMask(0);
perfCounter->setEdgeDetect(false);
perfCounter->setEnableAPICInterrupt(false);
perfCounter->setInvertCntMask(false);
perfCounter->setUnitMask(0);
perfCounter->setMaxSlots(p->getMaxSlots());
//Finds an available slot for our purpose
perfCounterSlot = perfCounter->findAvailableSlot();
//findAvailableSlot() returns -2 in case of error
if (perfCounterSlot == 0xfffffffe)
throw "unable to access performance counter slots";
//findAvailableSlot() returns -1 in case there aren't available slots
if (perfCounterSlot == 0xffffffff)
throw "unable to find an available performance counter slot";
printf("Performance counter will use slot #%d\n", perfCounterSlot);
//In case there are no errors, we program the object with the slot itself has found
perfCounter->setSlot(perfCounterSlot);
// Program the counter slot
if (!perfCounter->program())
throw "unable to program performance counter parameters";
// Enable the counter slot
if (!perfCounter->enable())
throw "unable to enable performance counters";
/* Here we take a snapshot of the performance counter and a snapshot of the time
* stamp counter to initialize the arrays to let them not show erratic huge numbers
* on first step
*/
if (!perfCounter->takeSnapshot())
{
throw "unable to retrieve performance counter data";
return;
}
if (!tscCounter->readMSR(TIME_STAMP_COUNTER_REG, cpuMask))
{
throw "unable to retrieve time stamp counter";
return;
}
cpuIndex = 0;
for (nodeId = 0; nodeId < p->getProcessorNodes(); nodeId++)
{
for (coreId = 0; coreId < p->getProcessorCores(); coreId++)
{
prevPerfCounters[cpuIndex] = perfCounter->getCounter(cpuIndex);
prevTSCCounters[cpuIndex] = tscCounter->getBits(cpuIndex, 0, 64);
cpuIndex++;
}
}
Signal::activateSignalHandler(SIGINT);
printf("Values >100%% can be expected if the CPU is in a Boosted State\n");
while (!Signal::getSignalStatus())
{
if (!perfCounter->takeSnapshot())
{
throw "unable to retrieve performance counter data";
return;
}
if (!tscCounter->readMSR(TIME_STAMP_COUNTER_REG, cpuMask))
{
throw "unable to retrieve time stamp counter";
return;
}
cpuIndex = 0;
for (nodeId = 0; nodeId < p->getProcessorNodes(); nodeId++)
{
printf("\nNode %d -", nodeId);
for (coreId = 0x0; coreId < p->getProcessorCores(); coreId++)
{
usage = ((perfCounter->getCounter(cpuIndex)) - prevPerfCounters[cpuIndex]) * 100;
usage /= tscCounter->getBits(cpuIndex, 0, 64) - prevTSCCounters[cpuIndex];
printf(" c%d:%d%%", coreId, (unsigned int) usage);
prevPerfCounters[cpuIndex] = perfCounter->getCounter(cpuIndex);
prevTSCCounters[cpuIndex] = tscCounter->getBits(cpuIndex, 0, 64);
cpuIndex++;
}
}
Sleep(1000);
}
perfCounter->disable();
printf ("CTRL-C executed. Cleaning on exit...\n");
} catch (char const *str) {
if (perfCounter->getEnabled()) perfCounter->disable();
printf("K10PerformanceCounters.cpp::perfMonitorCPUUsage - %s\n", str);
}
free(perfCounter);
free(tscCounter);
free(prevPerfCounters);
free(prevTSCCounters);
return;
}