User Guide

Contents

Counters API

The counters API is used to observe user-defined global characteristic counters that are unknown to
VTune
Profiler
. 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
__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.

Usage Example

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);

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804