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-rw-r--r--src/mem/ruby/system/MultiBitSelBloomFilter.cc191
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diff --git a/src/mem/ruby/system/MultiBitSelBloomFilter.cc b/src/mem/ruby/system/MultiBitSelBloomFilter.cc
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--- a/src/mem/ruby/system/MultiBitSelBloomFilter.cc
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-
-/*
- * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
- * 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.
- */
-
-/*
- * NonCountingBloomFilter.C
- *
- * Description:
- *
- *
- */
-
-#include "mem/ruby/system/MultiBitSelBloomFilter.hh"
-#include "mem/gems_common/Map.hh"
-#include "mem/ruby/common/Address.hh"
-
-MultiBitSelBloomFilter::MultiBitSelBloomFilter(string str)
-{
-
- string tail(str);
- string head = string_split(tail, '_');
-
- // head contains filter size, tail contains bit offset from block number
- m_filter_size = atoi(head.c_str());
-
- head = string_split(tail, '_');
- m_num_hashes = atoi(head.c_str());
-
- head = string_split(tail, '_');
- m_skip_bits = atoi(head.c_str());
-
- if(tail == "Regular") {
- isParallel = false;
- } else if (tail == "Parallel") {
- isParallel = true;
- } else {
- cout << "ERROR: Incorrect config string for MultiBitSel Bloom! :" << str << endl;
- assert(0);
- }
-
- m_filter_size_bits = log_int(m_filter_size);
-
- m_par_filter_size = m_filter_size/m_num_hashes;
- m_par_filter_size_bits = log_int(m_par_filter_size);
-
- m_filter.setSize(m_filter_size);
- clear();
-}
-
-MultiBitSelBloomFilter::~MultiBitSelBloomFilter(){
-}
-
-void MultiBitSelBloomFilter::clear()
-{
- for (int i = 0; i < m_filter_size; i++) {
- m_filter[i] = 0;
- }
-}
-
-void MultiBitSelBloomFilter::increment(const Address& addr)
-{
- // Not used
-}
-
-
-void MultiBitSelBloomFilter::decrement(const Address& addr)
-{
- // Not used
-}
-
-void MultiBitSelBloomFilter::merge(AbstractBloomFilter * other_filter){
- // assumes both filters are the same size!
- MultiBitSelBloomFilter * temp = (MultiBitSelBloomFilter*) other_filter;
- for(int i=0; i < m_filter_size; ++i){
- m_filter[i] |= (*temp)[i];
- }
-
-}
-
-void MultiBitSelBloomFilter::set(const Address& addr)
-{
- for (int i = 0; i < m_num_hashes; i++) {
- int idx = get_index(addr, i);
- m_filter[idx] = 1;
-
- //Profile hash value distribution
- //g_system_ptr->getProfiler()->getXactProfiler()->profileHashValue(i, idx); //gem5:Arka for decomissioning of log_tm
- }
-}
-
-void MultiBitSelBloomFilter::unset(const Address& addr)
-{
- cout << "ERROR: Unset should never be called in a Bloom filter";
- assert(0);
-}
-
-bool MultiBitSelBloomFilter::isSet(const Address& addr)
-{
- bool res = true;
-
- for (int i=0; i < m_num_hashes; i++) {
- int idx = get_index(addr, i);
- res = res && m_filter[idx];
- }
- return res;
-}
-
-
-int MultiBitSelBloomFilter::getCount(const Address& addr)
-{
- return isSet(addr)? 1: 0;
-}
-
-int MultiBitSelBloomFilter::getIndex(const Address& addr)
-{
- return 0;
-}
-
-int MultiBitSelBloomFilter::readBit(const int index) {
- return 0;
-}
-
-void MultiBitSelBloomFilter::writeBit(const int index, const int value) {
-
-}
-
-int MultiBitSelBloomFilter::getTotalCount()
-{
- int count = 0;
-
- for (int i = 0; i < m_filter_size; i++) {
- count += m_filter[i];
- }
- return count;
-}
-
-void MultiBitSelBloomFilter::print(ostream& out) const
-{
-}
-
-int MultiBitSelBloomFilter::get_index(const Address& addr, int i)
-{
- // m_skip_bits is used to perform BitSelect after skipping some bits. Used to simulate BitSel hashing on larger than cache-line granularities
- uint64 x = (addr.getLineAddress()) >> m_skip_bits;
- int y = hash_bitsel(x, i, m_num_hashes, 30, m_filter_size_bits);
- //36-bit addresses, 6-bit cache lines
-
- if(isParallel) {
- return (y % m_par_filter_size) + i*m_par_filter_size;
- } else {
- return y % m_filter_size;
- }
-}
-
-
-int MultiBitSelBloomFilter::hash_bitsel(uint64 value, int index, int jump, int maxBits, int numBits) {
- uint64 mask = 1;
- int result = 0;
- int bit, i;
-
- for(i = 0; i < numBits; i++) {
- bit = (index + jump*i) % maxBits;
- if (value & (mask << bit)) result += mask << i;
- }
- return result;
-}