statistics.cc

来自「M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作」· CC 代码 · 共 293 行

/*
 * Copyright (c) 2003, 2004, 2005
 * The Regents of The University of Michigan
 * All Rights Reserved
 *
 * This code is part of the M5 simulator.
 *
 * Permission is granted to use, copy, create derivative works and
 * redistribute this software and such derivative works for any
 * purpose, so long as the copyright notice above, this grant of
 * permission, and the disclaimer below appear in all copies made; and
 * so long as the name of The University of Michigan is not used in
 * any advertising or publicity pertaining to the use or distribution
 * of this software without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND
 * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE
 * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT,
 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGES.
 *
 * Authors: Nathan L. Binkert
 */

#include <iomanip>
#include <fstream>
#include <list>
#include <map>
#include <string>

#include "base/callback.hh"
#include "base/cprintf.hh"
#include "base/hostinfo.hh"
#include "base/misc.hh"
#include "base/statistics.hh"
#include "base/str.hh"
#include "base/time.hh"
#include "base/trace.hh"
#include "base/stats/statdb.hh"

using namespace std;

namespace Stats {

StatData *
DataAccess::find() const
{
    return Database::find(const_cast<void *>((const void *)this));
}

const StatData *
getStatData(const void *stat)
{
    return Database::find(const_cast<void *>(stat));
}

void
DataAccess::map(StatData *data)
{
    Database::regStat(this, data);
}

StatData *
DataAccess::statData()
{
    StatData *ptr = find();
    assert(ptr);
    return ptr;
}

const StatData *
DataAccess::statData() const
{
    const StatData *ptr = find();
    assert(ptr);
    return ptr;
}

void
DataAccess::setInit()
{
    statData()->flags |= init;
}

void
DataAccess::setPrint()
{
    Database::regPrint(this);
}

StatData::StatData()
    : flags(none), precision(-1), prereq(0)
{
    static int count = 0;
    id = count++;
}

StatData::~StatData()
{
}

bool
StatData::less(StatData *stat1, StatData *stat2)
{
    const string &name1 = stat1->name;
    const string &name2 = stat2->name;

    vector<string> v1;
    vector<string> v2;

    tokenize(v1, name1, '.');
    tokenize(v2, name2, '.');

    int last = min(v1.size(), v2.size()) - 1;
    for (int i = 0; i < last; ++i)
        if (v1[i] != v2[i])
            return v1[i] < v2[i];

    // Special compare for last element.
    if (v1[last] == v2[last])
        return v1.size() < v2.size();
    else
        return v1[last] < v2[last];

    return false;
}

bool
StatData::baseCheck() const
{
    if (!(flags & init)) {
#ifdef DEBUG
        cprintf("this is stat number %d\n", id);
#endif
        panic("Not all stats have been initialized");
        return false;
    }

    if ((flags & print) && name.empty()) {
        panic("all printable stats must be named");
        return false;
    }

    return true;
}


void
FormulaBase::result(VResult &vec) const
{
    if (root)
        vec = root->result();
}

Result
FormulaBase::total() const
{
    return root ? root->total() : 0.0;
}

size_t
FormulaBase::size() const
{
    if (!root)
        return 0;
    else
        return root->size();
}

void
FormulaBase::reset()
{
}

bool
FormulaBase::zero() const
{
    VResult vec;
    result(vec);
    for (int i = 0; i < vec.size(); ++i)
        if (vec[i] != 0.0)
            return false;
    return true;
}

void
FormulaBase::update(StatData *)
{
}

string
FormulaBase::str() const
{
    return root ? root->str() : "";
}

Formula::Formula()
{
    setInit();
}

Formula::Formula(Temp r)
{
    root = r;
    assert(size());
}

const Formula &
Formula::operator=(Temp r)
{
    assert(!root && "Can't change formulas");
    root = r;
    assert(size());
    return *this;
}

const Formula &
Formula::operator+=(Temp r)
{
    if (root)
        root = NodePtr(new BinaryNode<std::plus<Result> >(root, r));
    else
        root = r;
    assert(size());
    return *this;
}

void
check()
{
    typedef Database::stat_list_t::iterator iter_t;

    iter_t i, end = Database::stats().end();
    for (i = Database::stats().begin(); i != end; ++i) {
        StatData *data = *i;
        assert(data);
        if (!data->check() || !data->baseCheck())
            panic("stat check failed for %s\n", data->name);
    }

    int j = 0;
    for (i = Database::stats().begin(); i != end; ++i) {
        StatData *data = *i;
        if (!(data->flags & print))
            data->name = "__Stat" + to_string(j++);
    }

    Database::stats().sort(StatData::less);

    if (i == end)
        return;

    iter_t last = i;
    ++i;

    for (i = Database::stats().begin(); i != end; ++i) {
        if ((*i)->name == (*last)->name)
            panic("same name used twice! name=%s\n", (*i)->name);

        last = i;
    }
}

CallbackQueue resetQueue;

void
reset()
{
    Database::stat_list_t::iterator i = Database::stats().begin();
    Database::stat_list_t::iterator end = Database::stats().end();
    while (i != end) {
        StatData *data = *i;
        data->reset();
        ++i;
    }

    resetQueue.process();
}

void
registerResetCallback(Callback *cb)
{
    resetQueue.add(cb);
}

/* namespace Stats */ }