text.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 751 行 · 第 1/2 页

/*
 * Copyright (c) 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
 */

#if defined(__APPLE__)
#define _GLIBCPP_USE_C99 1
#endif

#if defined(__sun)
#include <math.h>
#endif

#include <iostream>
#include <sstream>
#include <fstream>
#include <string>

#include "base/misc.hh"
#include "base/statistics.hh"
#include "base/stats/statdb.hh"
#include "base/stats/text.hh"
#include "base/stats/visit.hh"

using namespace std;

#ifndef NAN
float __nan();
/** Define Not a number. */
#define NAN (__nan())
/** Need to define __nan() */
#define __M5_NAN
#endif

#ifdef __M5_NAN
float
__nan()
{
    union {
        uint32_t ui;
        float f;
    } nan;

    nan.ui = 0x7fc00000;
    return nan.f;
}
#endif

namespace Stats {

Text::Text()
    : mystream(false), stream(NULL), compat(false), descriptions(false)
{
}

Text::Text(std::ostream &stream)
    : mystream(false), stream(NULL), compat(false), descriptions(false)
{
    open(stream);
}

Text::Text(const std::string &file)
    : mystream(false), stream(NULL), compat(false), descriptions(false)
{
    open(file);
}


Text::~Text()
{
    if (mystream) {
        assert(stream);
        delete stream;
    }
}

void
Text::open(std::ostream &_stream)
{
    if (stream)
        panic("stream already set!");

    mystream = false;
    stream = &_stream;
    assert(valid());
}

void
Text::open(const std::string &file)
{
    if (stream)
        panic("stream already set!");

    mystream = true;
    stream = new ofstream(file.c_str(), ios::trunc);
    assert(valid());
}

bool
Text::valid() const
{
    return stream != NULL;
}

void
Text::output()
{
    using namespace Database;

    ccprintf(*stream, "\n---------- Begin Simulation Statistics ----------\n");
    stat_list_t::const_iterator i, end = stats().end();
    for (i = stats().begin(); i != end; ++i)
        (*i)->visit(*this);
    ccprintf(*stream, "\n---------- End Simulation Statistics   ----------\n");
    stream->flush();
}

bool
Text::noOutput(const StatData &data)
{
    if (!(data.flags & print))
        return true;

    if (data.prereq && data.prereq->zero())
        return true;

    return false;
}

string
ValueToString(Result value, int precision, bool compat)
{
    stringstream val;

    if (!isnan(value)) {
        if (precision != -1)
            val.precision(precision);
        else if (value == rint(value))
            val.precision(0);

        val.unsetf(ios::showpoint);
        val.setf(ios::fixed);
        val << value;
    } else {
        val << (compat ? "<err: div-0>" : "no value");
    }

    return val.str();
}

struct ScalarPrint
{
    Result value;
    string name;
    string desc;
    StatFlags flags;
    bool compat;
    bool descriptions;
    int precision;
    Result pdf;
    Result cdf;

    void operator()(ostream &stream) const;
};

void
ScalarPrint::operator()(ostream &stream) const
{
    if (flags & nozero && value == 0.0 ||
        flags & nonan && isnan(value))
        return;

    stringstream pdfstr, cdfstr;

    if (!isnan(pdf))
        ccprintf(pdfstr, "%.2f%%", pdf * 100.0);

    if (!isnan(cdf))
        ccprintf(cdfstr, "%.2f%%", cdf * 100.0);

    if (compat && flags & __substat) {
        ccprintf(stream, "%32s %12s %10s %10s", name,
                 ValueToString(value, precision, compat), pdfstr, cdfstr);
    } else {
        ccprintf(stream, "%-40s %12s %10s %10s", name,
                 ValueToString(value, precision, compat), pdfstr, cdfstr);
    }

    if (descriptions) {
        if (!desc.empty())
            ccprintf(stream, " # %s", desc);
    }
    stream << endl;
}

struct VectorPrint
{
    string name;
    string desc;
    vector<string> subnames;
    vector<string> subdescs;
    StatFlags flags;
    bool compat;
    bool descriptions;
    int precision;
    VResult vec;
    Result total;

    void operator()(ostream &stream) const;
};

void
VectorPrint::operator()(std::ostream &stream) const
{
    int _size = vec.size();
    Result _total = 0.0;

    if (flags & (pdf | cdf)) {
        for (int i = 0; i < _size; ++i) {
            _total += vec[i];
        }
    }

    string base = name + (compat ? "_" : "::");

    ScalarPrint print;
    print.name = name;
    print.desc = desc;
    print.compat = compat;
    print.precision = precision;
    print.descriptions = descriptions;
    print.flags = flags;
    print.pdf = NAN;
    print.cdf = NAN;

    bool havesub = !subnames.empty();

    if (_size == 1) {
        print.value = vec[0];
        print(stream);
    } else if (!compat) {
        for (int i = 0; i < _size; ++i) {
            if (havesub && (i >= subnames.size() || subnames[i].empty()))
                continue;

            print.name = base + (havesub ? subnames[i] : to_string(i));
            print.desc = subdescs.empty() ? desc : subdescs[i];
            print.value = vec[i];

            if (_total && (flags & pdf)) {
                print.pdf = vec[i] / _total;
                print.cdf += print.pdf;
            }

            print(stream);
        }

        if (flags & ::Stats::total) {
            print.name = base + "total";
            print.desc = desc;
            print.value = total;
            print(stream);
        }
    } else {
        if (flags & ::Stats::total) {
            print.value = total;
            print(stream);
        }

        Result _pdf = 0.0;
        Result _cdf = 0.0;
        if (flags & dist) {
            ccprintf(stream, "%s.start_dist\n", name);
            for (int i = 0; i < _size; ++i) {
                print.name = havesub ? subnames[i] : to_string(i);
                print.desc = subdescs.empty() ? desc : subdescs[i];
                print.flags |= __substat;
                print.value = vec[i];

                if (_total) {
                    _pdf = vec[i] / _total;
                    _cdf += _pdf;
                }

                if (flags & pdf)
                    print.pdf = _pdf;
                if (flags & cdf)
                    print.cdf = _cdf;

                print(stream);
            }
            ccprintf(stream, "%s.end_dist\n", name);
        } else {
            for (int i = 0; i < _size; ++i) {
                if (havesub && subnames[i].empty())
                    continue;

                print.name = base;
                print.name += havesub ? subnames[i] : to_string(i);
                print.desc = subdescs.empty() ? desc : subdescs[i];
                print.value = vec[i];

                if (_total) {
                    _pdf = vec[i] / _total;
                    _cdf += _pdf;
                } else {
                    _pdf = _cdf = NAN;
                }

                if (flags & pdf) {
                    print.pdf = _pdf;
                    print.cdf = _cdf;
                }

                print(stream);
            }
        }
    }
}

struct DistPrint
{
    string name;
    string desc;
    StatFlags flags;
    bool compat;
    bool descriptions;
    int precision;

    Result min_val;
    Result max_val;
    Result underflow;
    Result overflow;
    VResult vec;
    Result sum;
    Result squares;
    Result samples;

    Counter min;
    Counter max;
    Counter bucket_size;
    int size;
    bool fancy;

    void operator()(ostream &stream) const;
};

void
DistPrint::operator()(ostream &stream) const
{
    if (fancy) {