rocm-systems/source/lib/rocprofiler/counters/metrics.cpp

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#include "metrics.hpp"

#include <rocprofiler/rocprofiler.h>

#include "lib/common/synchronized.hpp"
#include "lib/common/utility.hpp"
#include "lib/common/xml.hpp"

#include "glog/logging.h"

#include <dlfcn.h>  // for dladdr
#include <atomic>
#include <cstdlib>
#include <filesystem>
#include <optional>

namespace rocprofiler
{
namespace counters
{
namespace
{
MetricMap
loadXml(const std::string& filename)
{
    static std::atomic<uint64_t> id = 0;
    MetricMap                    ret;
    DLOG(INFO) << "Loading Counter Config: " << filename;
    // todo: return unique_ptr....
    auto xml = common::Xml::Create(filename);
    LOG_IF(FATAL, !xml)
        << "Could not open XML Counter Config File (set env ROCPROFILER_METRICS_PATH)";

    for(const auto& [gfx_name, nodes] : xml->GetAllNodes())
    {
        /**
         * "top." is used to designate the root encapsulation of all contained XML subroots (in our
         * case "gfxX"). This is inserted by the parser so it will always be present. .metric
         * denotes XML tags that are contained in the subroots. This will not change unless we
         * respec the XML (which we should...).
         */
        if(gfx_name.find("metric") == std::string::npos ||
           gfx_name.find("top.") == std::string::npos)
            continue;

        auto& metricVec =
            ret.emplace(gfx_name.substr(strlen("top."),
                                        gfx_name.size() - strlen("top.") - strlen(".metric")),
                        std::vector<Metric>())
                .first->second;
        for(const auto& node : nodes)
        {
            metricVec.emplace_back(node->opts["name"],
                                   node->opts["block"],
                                   node->opts["event"],
                                   node->opts["descr"],
                                   node->opts["expr"],
                                   node->opts["special"],
                                   id);
            id++;
        }
    }

    return ret;
}

std::string
findViaInstallPath(const std::string& filename)
{
    Dl_info dl_info = {};
    DLOG(INFO) << filename << " is being looked up via install path";
    if(dladdr(reinterpret_cast<const void*>(rocprofiler_query_available_agents), &dl_info) != 0)
    {
        return std::filesystem::path{dl_info.dli_fname}.parent_path().parent_path() /
               fmt::format("share/rocprofiler/{}", filename);
    }
    return filename;
}

std::string
findViaEnvironment(const std::string& filename)
{
    if(const char* metrics_path = nullptr; (metrics_path = getenv("ROCPROFILER_METRICS_PATH")))
    {
        DLOG(INFO) << filename << " is being looked up via env variable ROCPROFILER_METRICS_PATH";
        return std::filesystem::path{std::string{metrics_path}} / filename;
    }
    // No environment variable, lookup via install path
    return findViaInstallPath(filename);
}

}  // namespace

MetricMap
getDerivedHardwareMetrics()
{
    return loadXml(findViaEnvironment("derived_counters.xml"));
}

MetricMap
getBaseHardwareMetrics()
{
    return loadXml(findViaEnvironment("basic_counters.xml"));
}

const MetricIdMap&
getMetricIdMap()
{
    static MetricIdMap id_map = []() {
        MetricIdMap map;
        for(const auto& [_, val] : getMetricMap())
        {
            for(const auto& metric : val)
            {
                map.emplace(metric.id(), metric);
            }
        }
        return map;
    }();
    return id_map;
}

const MetricMap&
getMetricMap()
{
    static MetricMap map = []() {
        MetricMap ret = getBaseHardwareMetrics();
        for(auto& [key, val] : getDerivedHardwareMetrics())
        {
            auto [iter, inserted] = ret.emplace(key, val);
            if(!inserted)
            {
                iter->second.insert(iter->second.end(), val.begin(), val.end());
            }
        }
        return ret;
    }();
    return map;
}

const std::vector<Metric>&
getMetricsForAgent(const std::string& agent)
{
    static const std::vector<Metric> empty;
    const auto&                      map = getMetricMap();
    if(const auto* metric_ptr = rocprofiler::common::get_val(map, agent))
    {
        return *metric_ptr;
    }

    return empty;
}

bool
operator<(Metric const& lhs, Metric const& rhs)
{
    return lhs.id() < rhs.id();
}
}  // namespace counters
}  // namespace rocprofiler