SummarizingMetric(const char * name, T initial_value, bool reg_new = true)
: impl::MetricBase(name, reg_new)
, initial_value(initial_value)
, value_(initial_value)
, n(0) // TODO: this assumes initial_value is not actually a value
, mean(initial_value)
, M2(0)
, min(std::numeric_limits<T>::max())
, max(std::numeric_limits<T>::min()) {
#ifdef VTRACE_SAMPLED
if (SummarizingMetric::vt_type == -1) {
LOG(ERROR) << "warning: VTrace sampling unsupported for this type of SummarizingMetric.";
} else {
std::string namestr( name );
std::string countstr = namestr + "_count";
std::string meanstr = namestr + "_mean";
std::string stddevstr = namestr + "_stddev";
vt_counter_value = VT_COUNT_DEF(name, name, SummarizingMetric::vt_type, VT_COUNT_DEFGROUP);
vt_counter_count = VT_COUNT_DEF(countstr.c_str(), countstr.c_str(), VT_COUNT_TYPE_UNSIGNED, VT_COUNT_DEFGROUP);
vt_counter_mean = VT_COUNT_DEF(meanstr.c_str(), meanstr.c_str(), VT_COUNT_TYPE_DOUBLE, VT_COUNT_DEFGROUP);
vt_counter_stddev = VT_COUNT_DEF(stddevstr.c_str(), stddevstr.c_str(), VT_COUNT_TYPE_DOUBLE, VT_COUNT_DEFGROUP);
}
#endif
}
// reset using function
// IMPORTANT: currently, this forces the merge to do a min instead of a sum
SimpleMetric(const char * name, InitFn initf, bool reg_new = true):
value_(initf()), initf_(initf), impl::MetricBase(name, reg_new) {
#ifdef VTRACE_SAMPLED
if (SimpleMetric::vt_type == -1) {
LOG(ERROR) << "warning: VTrace sampling unsupported for this type of SimpleMetric.";
} else {
vt_counter = VT_COUNT_DEF(name, name, SimpleMetric::vt_type, VT_COUNT_DEFGROUP);
}
#endif
}
MaxMetric(const char * name, T initial_value, bool reg_new = true):
initial_value(initial_value), value_(initial_value), impl::MetricBase(name, reg_new) {
#ifdef VTRACE_SAMPLED
if (MaxMetric::vt_type == -1) {
LOG(ERROR) << "warning: VTrace sampling unsupported for this type of MaxMetric.";
} else {
vt_counter = VT_COUNT_DEF(name, name, MaxMetric::vt_type, VT_COUNT_DEFGROUP);
}
#endif
}
