Intel® VTune™ Amplifier XE and Intel® VTune™ Amplifier for Systems Help
The counters API is used to observe user-defined global characteristic counters that are unknown to VTune Amplifier. For example, it is useful for system on a chip (SoC) development when different counters may represent different parts of the SoC and count some hardware characteristics.
Use This Primitive |
To Do This |
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__itt_counter __itt_counter_create(const char *name, const char *domain); __itt_counter_createA(const char *name, const char *domain); __itt_counter_createW(const wchar_t *name, const wchar_t *domain); __itt_counter_create_typed (const char *name, const char *domain, __itt_metadata_type type); __itt_counter_create_typedA __itt_counter_create_typedA(const char *name, const char *domain, __itt_metadata_type type); __itt_counter_create_typedW __itt_counter_create_typedW(const wchar_t *name, const wchar_t *domain, __itt_metadata_type type); |
Define and create a new counter object. A counter name and domain name should be specified. To load a specialized type of data, specify the counter type. By default the unsigned int64 type is used. |
__itt_counter_inc (__itt_counter id); __itt_counter_inc_delta(__itt_counter id, unsigned long long value); __itt_counter_dec(__itt_counter id); __itt_counter_dec_delta(__itt_counter id, unsigned long long value); |
Increment\decrement counter value. Applicable to uint64 counters only. |
__itt_counter_set_value(__itt_counter id, void *value_ptr); |
Directly set the counter value. This is the recommended way to change the value of a counter. |
__itt_counter_destroy(__itt_counter id); |
Remove an existing counter. |
The following example creates a counter that measures temperature and memory usage metrics.
#include "ittnotify.h"
__itt_counter temperatureCounter = __itt_counter_create("Temperature", "Domain");
__itt_counter memoryUsageCounter = __itt_counter_create("Memory Usage", "Domain");
unsigned __int64 temperature;
while (...)
{
...
temperature = getTemperature();
__itt_counter_set_value(temperatureCounter, &temperature);
__itt_counter_inc_delta(memoryUsageCounter, getAllocatedMemSize());
__itt_counter_dec_delta(memoryUsageCounter, getDeallocatedMemSize());
...
}
__itt_counter_destroy(temperatureCounter);
__itt_counter_destroy(memoryUsageCounter);