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Calculating Multiple Metrics Extension

Calculating Multiple Metrics Extension

Sample Code

The following code demonstrates how to calculate and process multiple metric values:

// Get data count and total metric count
uint32_t dataCount = 0;
uint32_t totalMetricCount = 0;
zetMetricGroupCalculateMultipleMetricValuesExp(hMetricGroup, type, rawDataSize, pRawData, &dataCount, &totalMetricCount, nullptr, nullptr);

// Get metric counts and metric values
std::vector<uint32_t> metricCounts(dataCount);
std::vector<zet_typed_value_t> metricValues(totalMetricCount);
zetMetricGroupCalculateMultipleMetricValuesExp(hMetricGroup, type, rawDataSize, pRawData, &dataCount, &totalMetricCount, metricCounts.data(), metricValues.data());

// Example showing how to process the metric values

// Setup
uint32_t metricCount = 0;
zetMetricGet(hMetricGroup, &metricCount, nullptr);

zet_metric_handle_t* phMetrics = malloc(metricCount * sizeof(zet_metric_handle_t));
zetMetricGet(hMetricGroup, &metricCount, phMetrics);

// This loop over metric data is new for this extension
uint32_t startIndex = 0;
for (uint32_t dataIndex = 0; dataIndex < dataCount; dataIndex++) {

    // Processing each metric data is the same as for the single
    // calculate metric values
    const uint32_t metricCountForDataIndex = metricCounts[dataIndex];
    const uint32_t reportCount = metricCountForDataIndex / metricCount;
    for (uint32_t report = 0; report < reportCount; report++) {
        for (uint32_t metric = 0; metric < metricCount ; metric++) {
            const size_t metricIndex = report * metricCount + metric;
            process_metric_value(metricValues[startIndex + metricIndex]));
        }
    }

    startIndex += metricCountForDataIndex;
}
assert(startIndex == totalMetricCount);