gem5/src/base/stats/group.cc

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#include "base/stats/group.hh"

#include "base/logging.hh"
#include "base/stats/info.hh"
#include "base/trace.hh"
#include "debug/Stats.hh"
#include "sim/sim_object.hh"

namespace Stats {

Group::Group(Group *parent, const char *name)
    : mergedParent(nullptr)
{
    if (parent && name) {
        parent->addStatGroup(name, this);
    } else if (parent && !name) {
        parent->mergeStatGroup(this);
    }
}

Group::~Group()
{
}

void
Group::regStats()
{
    for (auto &g : mergedStatGroups)
        g->regStats();

    for (auto &g : statGroups) {
        if (DTRACE(Stats)) {
            M5_VAR_USED const SimObject *so =
                dynamic_cast<const SimObject *>(this);
            DPRINTF(Stats, "%s: regStats in group %s\n",
                    so ? so->name() : "?",
                    g.first);
        }
        g.second->regStats();
    }
}

void
Group::resetStats()
{
    for (auto &s : stats)
        s->reset();

    for (auto &g : mergedStatGroups)
        g->resetStats();

    for (auto &g : statGroups)
        g.second->resetStats();
}

void
Group::preDumpStats()
{
    for (auto &g : mergedStatGroups)
        g->preDumpStats();

    for (auto &g : statGroups)
        g.second->preDumpStats();
}

void
Group::addStat(Stats::Info *info)
{
    stats.push_back(info);
    if (mergedParent)
        mergedParent->addStat(info);
}

void
Group::addStatGroup(const char *name, Group *block)
{
    panic_if(statGroups.find(name) != statGroups.end(),
             "Stats of the same group share the same name `%s`.\n", name);

    statGroups[name] = block;
}

const Info *
Group::resolveStat(std::string name) const
{
    auto pos = name.find(".");
    if (pos == std::string::npos) {
        // look for the stat in this group
        for (auto &info : stats) {
            if (info->name == name) {
                return info;
            }
        }
    } else {
        // look for the stat in subgroups
        const std::string gname = name.substr(0, pos);
        for (auto &g : statGroups) {
            if (g.first == gname) {
                return g.second->resolveStat(name.substr(pos + 1));
            }
        }
    }

    // finally look for the stat in groups that have been merged
    for (auto &g : mergedStatGroups) {
        auto info = g->resolveStat(name);
        if (info) {
            return info;
        }
    }

    return nullptr;
}

void
Group::mergeStatGroup(Group *block)
{
    panic_if(!block, "No stat block provided");
    panic_if(block->mergedParent,
             "Stat group already merged into another group");
    panic_if(block == this, "Stat group can't merge with itself");

    // Track the new stat group
    mergedStatGroups.push_back(block);

    // We might not have seen stats that were associated with the
    // child group before it was merged, so add them here.
    for (auto &s : block->stats)
        addStat(s);

    // Setup the parent pointer so the child know that it needs to
    // register new stats with the parent.
    block->mergedParent = this;
}

const std::map<std::string, Group *> &
Group::getStatGroups() const
{
    return statGroups;
}

const std::vector<Info *> &
Group::getStats() const
{
    return stats;
}

} // namespace Stats