Function computeElapsedTimeUserdata

Src/Base/AMReX_CuptiTrace.cpp:141–181

}

double
computeElapsedTimeUserdata (const std::vector<std::unique_ptr<CUpti_Activity_Userdata>>&
                            activityRecordUserdata) noexcept
{
    if (activityRecordUserdata.empty()) {
        return 0.0;
    }

    std::map<int, unsigned long long> streamIDToElapsedTimeMap;

    // Initialize tally of unique streams
    for (auto& record : activityRecordUserdata) {
        if (streamIDToElapsedTimeMap.find(record->getStreamID())
            == streamIDToElapsedTimeMap.end()) {
            // Not found
            streamIDToElapsedTimeMap[record->getStreamID()] = 0;
        } else {
            // Found
        }
    }

    // Sum kernel times in each stream
    for (auto& record : activityRecordUserdata) {
        streamIDToElapsedTimeMap[record->getStreamID()] += record->getTimeElapsed();
    }

    // Sum over streams
    unsigned long long res = 0;
    for (auto const& kv : streamIDToElapsedTimeMap) {
        res += kv.second;
    }

    // Average time per kernel
    res /= (1.*activityRecordUserdata.size());

    // Alternative: average time per stream
    //res /= streamIDToElapsedTimeMap.size();

    // Default is ns, convert to sec
    return (double) res*1e-9;
}

void
CUpti_Activity_Userdata::setUintID (unsigned uintID) noexcept