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+/*
+ * 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.
+ */
+
+#include <sstream>
+
+#include "sat_counter.hh"
+
+#include "statistics.hh"
+#include "sim_stats.hh"
+
+
+using namespace std;
+
+
+SaturatingCounterPred::SaturatingCounterPred(string p_name,
+ string z_name,
+ string o_name,
+ unsigned _index_bits,
+ unsigned _counter_bits,
+ unsigned _zero_change,
+ unsigned _one_change,
+ unsigned _thresh,
+ unsigned _init_value)
+{
+ pred_name = p_name;
+ zero_name = z_name;
+ one_name = o_name;
+
+ index_bits = _index_bits;
+ counter_bits = _counter_bits;
+ zero_change = _zero_change;
+ one_change = _one_change;
+ thresh = _thresh;
+ init_value = _init_value;
+
+ max_index = (1 << index_bits) - 1;
+ max_value = (1 << counter_bits) - 1;
+
+ table = new unsigned[max_index + 1];
+
+ // Initialize with the right parameters & clear the counter
+ for (int i = 0; i <= max_index; ++i)
+ table[i] = init_value;
+}
+
+void SaturatingCounterPred::regStats()
+{
+ using namespace Statistics;
+ stringstream name, description;
+
+ //
+ // Number of predictions
+ //
+ name << pred_name << ":" << zero_name << ":preds";
+ description << "number of predictions of " << zero_name;
+ predicted_zero
+ .name(name.str())
+ .desc(description.str())
+ ;
+ description.str("");
+ name.str("");
+
+ name << pred_name << ":" << one_name << ":preds";
+ description << "number of predictions of " << one_name;
+ predicted_one
+ .name(name.str())
+ .desc(description.str())
+ ;
+ description.str("");
+ name.str("");
+
+ //
+ // Count the number of correct predictions
+ //
+ name << pred_name << ":" << zero_name << ":corr_preds";
+ description << "number of correct " << zero_name << " preds";
+ correct_pred_zero
+ .name(name.str())
+ .desc(description.str())
+ ;
+ description.str("");
+ name.str("");
+
+ name << pred_name << ":" << one_name << ":corr_preds";
+ description << "number of correct " << one_name << " preds";
+ correct_pred_one
+ .name(name.str())
+ .desc(description.str())
+ ;
+ description.str("");
+ name.str("");
+
+ //
+ // Number of predictor updates
+ //
+ name << pred_name << ":" << zero_name << ":updates";
+ description << "number of actual " << zero_name << "s";
+ record_zero
+ .name(name.str())
+ .desc(description.str())
+ ;
+ description.str("");
+ name.str("");
+
+ name << pred_name << ":" << one_name << ":updates";
+ description << "number of actual " << one_name << "s";
+ record_one
+ .name(name.str())
+ .desc(description.str())
+ ;
+ description.str("");
+ name.str("");
+}
+
+void SaturatingCounterPred::regFormulas()
+{
+ using namespace Statistics;
+ stringstream name, description;
+
+ //
+ // Number of predictions
+ //
+ name << pred_name << ":predictions";
+ preds_total
+ .name(name.str())
+ .desc("total number of predictions made")
+ ;
+ preds_total = predicted_zero + predicted_one;
+ name.str("");
+
+ //
+ // Fraction of all predictions that are one or zero
+ //
+ name << pred_name << ":" << zero_name << ":pred_frac";
+ description << "fraction of all preds that were " << zero_name;
+ pred_frac_zero
+ .name(name.str())
+ .desc(description.str())
+ ;
+ pred_frac_zero = 100 * predicted_zero / preds_total;
+ description.str("");
+ name.str("");
+
+ name << pred_name << ":" << one_name << ":pred_frac";
+ description << "fraction of all preds that were " << one_name;
+ pred_frac_one
+ .name(name.str())
+ .desc(description.str())
+ ;
+ pred_frac_one = 100 * predicted_one / preds_total;
+ description.str("");
+ name.str("");
+
+
+ //
+ // Count the number of correct predictions
+ //
+ name << pred_name << ":correct_preds";
+ correct_total
+ .name(name.str())
+ .desc("total correct predictions made")
+ ;
+ correct_total = correct_pred_one + correct_pred_zero;
+ name.str("");
+
+ //
+ // Number of predictor updates
+ //
+ name << pred_name << ":updates";
+ updates_total
+ .name(name.str())
+ .desc("total number of updates")
+ ;
+ updates_total = record_zero + record_one;
+ name.str("");
+
+ //
+ // Prediction accuracy rates
+ //
+ name << pred_name << ":pred_rate";
+ pred_rate
+ .name(name.str())
+ .desc("correct fraction of all preds")
+ ;
+ pred_rate = correct_total / updates_total;
+ name.str("");
+
+ name << pred_name << ":" << zero_name << ":pred_rate";
+ description << "fraction of " << zero_name << " preds that were correct";
+ frac_correct_zero
+ .name(name.str())
+ .desc(description.str())
+ ;
+ frac_correct_zero = 100 * correct_pred_zero /
+ (correct_pred_zero + record_one - correct_pred_one);
+ description.str("");
+ name.str("");
+
+ name << pred_name << ":" << one_name << ":pred_rate";
+ description << "fraction of " << one_name << " preds that were correct";
+ frac_correct_one
+ .name(name.str())
+ .desc(description.str())
+ ;
+ frac_correct_one = 100 * correct_pred_one /
+ (correct_pred_one + record_zero - correct_pred_zero);
+ description.str("");
+ name.str("");
+
+ //
+ // Coverage
+ //
+ name << pred_name << ":" << zero_name << ":coverage";
+ description << "fraction of " << zero_name
+ << "s that were predicted correctly";
+ coverage_zero
+ .name(name.str())
+ .desc(description.str())
+ ;
+ coverage_zero = 100 * correct_pred_zero / record_zero;
+ description.str("");
+ name.str("");
+
+ name << pred_name << ":" << one_name << ":coverage";
+ description << "fraction of " << one_name
+ << "s that were predicted correctly";
+ coverage_one
+ .name(name.str())
+ .desc(description.str())
+ ;
+ coverage_one = 100 * correct_pred_one / record_one;
+ description.str("");
+ name.str("");
+}
+
+
+
+
+
+
+
+
+
+
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