gem5/base/sat_counter.hh
Nathan Binkert 25a358983a Major stats package cleanup
Add support for generic visitors for stats and use them
to implement independent output functions.

Support for mysql output and some initial code for hacking
on mysql output with python

arch/alpha/pseudo_inst.cc:
base/hybrid_pred.cc:
base/hybrid_pred.hh:
base/sat_counter.cc:
base/sat_counter.hh:
cpu/simple_cpu/simple_cpu.cc:
kern/tru64/tru64_events.cc:
sim/main.cc:
sim/process.cc:
sim/process.hh:
sim/sim_events.cc:
sim/sim_object.cc:
sim/system.hh:
    update for changes in stats package
base/statistics.cc:
    move the python output code to base/stats/puthon.(cc|hh)
    and reimplement it as a visitor.

    move the text output code to base/stats/text.(cc|hh) and
    reimplement it as a visitor.

    move the database stuff into base/stats/statdb.(cc|hh) and
    get rid of the class.  Put everything as globals in the
    Statistics::Database namespace.

    allocate unique ids for all stats.

    directly implement the check routine and get rid of the
    various dumping routines since they're now in separate files.

    make sure that no two stats have the same name

    clean up some loops
base/statistics.hh:
    major changes to the statistics package again

    lots of code was factored out of statistics.hh into several
    separate files in base/stats/ (this will continue)

    There are now two Stat package types Result and Counter that
    are specified to allow the user to keep the counted type
    separate from the result type.  They are currently both doubles
    but that's an experiment.  There is no more per stat ability to
    set the type.  Statistics::Counter is not the same as Counter!

    Implement a visitor for statistics output so that new output
    types can be implemented independently from the stats package
    itself.

    Add a unique id to each stat so that it can be used to keep
    track of stats more simply.  This number can also be used in
    debugging problems with stats.

    Tweak the bucket size stuff a bit to make it work better.

    fixed VectorDist size bug
cpu/memtest/memtest.cc:
    Fix up for changes in stats package
    Don't use value() since it doesn't work with binning.  If you
    want a number as a stat, and to use it in the program itself,
    you really want two separate variables, one that's a stat,
    and one that's not.
cpu/memtest/memtest.hh:
    Fix up for changes in stats package
test/Makefile:
    Try to build stuff now that directories matter
test/stattest.cc:
    test all new output types
    choose which one with command line options

--HG--
extra : convert_revision : e3a3f5f0828c67c0e2de415d936ad240adaddc89
2004-05-04 17:01:00 -04:00

190 lines
5.7 KiB
C++

/*
* Copyright (c) 2003 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __SAT_COUNTER_HH__
#define __SAT_COUNTER_HH__
#include <string>
#include "base/predictor.hh"
#include "base/statistics.hh"
#include "sim/stats.hh"
//
//
// A simple saturating counter predictor
//
//
class SaturatingCounterPred : public GenericPredictor
{
private:
std::string pred_name;
std::string zero_name;
std::string one_name;
unsigned index_bits;
unsigned counter_bits;
unsigned zero_change;
unsigned one_change;
unsigned thresh;
unsigned init_value;
unsigned max_value; // maximum counter value
unsigned long max_index; // also the index mask value
unsigned *table;
// Statistics
Statistics::Scalar<> predicted_one; // Total predictions of one, preds_one
Statistics::Scalar<> predicted_zero; // Total predictions of zero, preds_zero
Statistics::Scalar<> correct_pred_one; // Total correct predictions of one, correct_one
Statistics::Scalar<> correct_pred_zero; // Total correct predictions of zero, correct_zero
Statistics::Scalar<> record_zero; //updates_zero
Statistics::Scalar<> record_one; //updates_one
Statistics::Formula preds_total;
Statistics::Formula pred_frac_zero;
Statistics::Formula pred_frac_one;
Statistics::Formula correct_total;
Statistics::Formula updates_total;
Statistics::Formula pred_rate;
Statistics::Formula frac_correct_zero;
Statistics::Formula frac_correct_one;
Statistics::Formula coverage_zero;
Statistics::Formula coverage_one;
private:
bool pred_one(unsigned &counter) { return counter > thresh; }
bool pred_zero(unsigned &counter) { return counter <= thresh; }
void update_one(unsigned &counter) {
if (one_change)
counter += one_change;
else
counter = 0;
// check for wrap
if (counter > max_value)
counter = max_value;
}
void update_zero(unsigned &counter) {
if (zero_change) {
// check for wrap
if (counter < zero_change)
counter = 0;
else
counter -= zero_change;
} else
counter = 0;
}
public:
SaturatingCounterPred(std::string p_name,
std::string z_name, std::string o_name,
unsigned _index_bits, unsigned _counter_bits = 2,
unsigned _zero_change = 1, unsigned _one_change = 1,
unsigned _thresh = 1, unsigned _init_value = 0);
void clear() {
for (int i = 0; i <= max_index; ++i)
table[i] = init_value;
}
// Record the ACTUAL result... and indicate whether the prediction
// corresponding to this event was correct
void record(unsigned long _index, unsigned _val, unsigned _predicted,
unsigned _pdata)
{
record(_index, _val, _predicted);
}
void record(unsigned long _index, unsigned _val, unsigned _predicted) {
unsigned long index = _index & max_index;
if (_val) {
update_one(table[index]);
++record_one;
if (_predicted)
++correct_pred_one;
} else {
update_zero(table[index]);
++record_zero;
if (!_predicted)
++correct_pred_zero;
}
}
unsigned value(unsigned long _index) {
unsigned long index = _index & max_index;
return table[index];
}
unsigned predict(unsigned long _index, unsigned &pdata) {
return predict(_index);
}
unsigned predict(unsigned long _index) {
unsigned long index = _index & max_index;
if (pred_one(table[index])) {
++predicted_one;
return 1;
}
++predicted_zero;
return 0;
}
// No internal state is changed here
unsigned peek(unsigned long _index) {
unsigned long index = _index & max_index;
if (pred_one(table[index]))
return 1;
return 0;
}
//=======================================================
void regStats();
void regFormulas();
};
#endif // __SAT_COUNTER_HH__