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

/******************************************************************************
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#include "metrics.hpp"

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

#include "glog/logging.h"
#include "lib/common/xml.hpp"
#include "rocprofiler/rocprofiler.h"

namespace counters
{
namespace
{
MetricMap
loadXml(const std::string& filename)
{
    MetricMap ret;
    DLOG(INFO) << "Loading Counter Config: " << filename;
    // todo: return unique_ptr....
    auto xml = xml::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"]);
        }
    }

    DLOG(INFO) << fmt::format("{}", ret);
    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}.remove_filename() /
               fmt::format("../lib/{}", filename);
    }
    return filename;
}

std::string
findViaEnvironment(const std::string& filename)
{
    if(getenv("ROCPROFILER_METRICS_PATH"))
    {
        DLOG(INFO) << filename << " is being looked up via env variable ROCPROFILER_METRICS_PATH";
        return std::filesystem::path{std::string(getenv("ROCPROFILER_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"));
}

};  // namespace counters