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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.
*/
#include "mem/ruby/profiler/AddressProfiler.hh"
#include <vector>
#include "base/bitfield.hh"
#include "base/stl_helpers.hh"
#include "mem/ruby/profiler/Profiler.hh"
#include "mem/ruby/protocol/RubyRequest.hh"
namespace gem5
{
namespace ruby
{
typedef AddressProfiler::AddressMap AddressMap;
using gem5::stl_helpers::operator<<;
// Helper functions
AccessTraceForAddress&
lookupTraceForAddress(Addr addr, AddressMap& record_map)
{
// we create a static default object here that is used to insert
// since the insertion will create a copy of the object in the
// process. Perhaps this is optimizing early, but it doesn't seem
// like it could hurt.
static const AccessTraceForAddress dflt;
std::pair<AddressMap::iterator, bool> r =
record_map.insert(std::make_pair(addr, dflt));
AddressMap::iterator i = r.first;
AccessTraceForAddress &access_trace = i->second;
if (r.second) {
// there was nothing there and the insert succeed, so we need
// to actually set the address.
access_trace.setAddress(addr);
}
return access_trace;
}
void
printSorted(std::ostream& out, int num_of_sequencers,
const AddressMap &record_map, std::string description,
Profiler *profiler)
{
const int records_printed = 100;
uint64_t misses = 0;
std::vector<const AccessTraceForAddress *> sorted;
AddressMap::const_iterator i = record_map.begin();
AddressMap::const_iterator end = record_map.end();
for (; i != end; ++i) {
const AccessTraceForAddress* record = &i->second;
misses += record->getTotal();
sorted.push_back(record);
}
sort(sorted.begin(), sorted.end(), AccessTraceForAddress::less_equal);
out << "Total_entries_" << description << ": " << record_map.size()
<< std::endl;
if (profiler->getAllInstructions()) {
out << "Total_Instructions_" << description << ": " << misses
<< std::endl;
} else {
out << "Total_data_misses_" << description << ": " << misses
<< std::endl;
}
out << "total | load store atomic | user supervisor | sharing | touched-by"
<< std::endl;
Histogram remaining_records(1, 100);
Histogram all_records(1, 100);
Histogram remaining_records_log(-1);
Histogram all_records_log(-1);
// Allows us to track how many lines where touched by n processors
std::vector<int64_t> m_touched_vec;
std::vector<int64_t> m_touched_weighted_vec;
m_touched_vec.resize(num_of_sequencers+1);
m_touched_weighted_vec.resize(num_of_sequencers+1);
for (int j = 0; j < m_touched_vec.size(); j++) {
m_touched_vec[j] = 0;
m_touched_weighted_vec[j] = 0;
}
int counter = 0;
int max = sorted.size();
while (counter < max && counter < records_printed) {
const AccessTraceForAddress* record = sorted[counter];
double percent = 100.0 * (record->getTotal() / double(misses));
out << description << " | " << percent << " % " << *record
<< std::endl;
all_records.add(record->getTotal());
all_records_log.add(record->getTotal());
counter++;
m_touched_vec[record->getTouchedBy()]++;
m_touched_weighted_vec[record->getTouchedBy()] += record->getTotal();
}
while (counter < max) {
const AccessTraceForAddress* record = sorted[counter];
all_records.add(record->getTotal());
remaining_records.add(record->getTotal());
all_records_log.add(record->getTotal());
remaining_records_log.add(record->getTotal());
m_touched_vec[record->getTouchedBy()]++;
m_touched_weighted_vec[record->getTouchedBy()] += record->getTotal();
}
out << std::endl;
out << "all_records_" << description << ": "
<< all_records << std::endl
<< "all_records_log_" << description << ": "
<< all_records_log << std::endl
<< "remaining_records_" << description << ": "
<< remaining_records << std::endl
<< "remaining_records_log_" << description << ": "
<< remaining_records_log << std::endl
<< "touched_by_" << description << ": "
<< m_touched_vec << std::endl
<< "touched_by_weighted_" << description << ": "
<< m_touched_weighted_vec << std::endl
<< std::endl;
}
AddressProfiler::AddressProfiler(int num_of_sequencers, Profiler *profiler)
: m_profiler(profiler)
{
m_num_of_sequencers = num_of_sequencers;
clearStats();
}
AddressProfiler::~AddressProfiler()
{
}
void
AddressProfiler::setHotLines(bool hot_lines)
{
m_hot_lines = hot_lines;
}
void
AddressProfiler::setAllInstructions(bool all_instructions)
{
m_all_instructions = all_instructions;
}
void
AddressProfiler::printStats(std::ostream& out) const
{
if (m_hot_lines) {
out << std::endl;
out << "AddressProfiler Stats" << std::endl;
out << "---------------------" << std::endl;
out << std::endl;
out << "sharing_misses: " << m_sharing_miss_counter << std::endl;
out << "getx_sharing_histogram: " << m_getx_sharing_histogram
<< std::endl;
out << "gets_sharing_histogram: " << m_gets_sharing_histogram
<< std::endl;
out << std::endl;
out << "Hot Data Blocks" << std::endl;
out << "---------------" << std::endl;
out << std::endl;
printSorted(out, m_num_of_sequencers, m_dataAccessTrace,
"block_address", m_profiler);
out << std::endl;
out << "Hot MacroData Blocks" << std::endl;
out << "--------------------" << std::endl;
out << std::endl;
printSorted(out, m_num_of_sequencers, m_macroBlockAccessTrace,
"macroblock_address", m_profiler);
out << "Hot Instructions" << std::endl;
out << "----------------" << std::endl;
out << std::endl;
printSorted(out, m_num_of_sequencers, m_programCounterAccessTrace,
"pc_address", m_profiler);
}
if (m_all_instructions) {
out << std::endl;
out << "All Instructions Profile:" << std::endl;
out << "-------------------------" << std::endl;
out << std::endl;
printSorted(out, m_num_of_sequencers, m_programCounterAccessTrace,
"pc_address", m_profiler);
out << std::endl;
}
if (m_retryProfileHisto.size() > 0) {
out << "Retry Profile" << std::endl;
out << "-------------" << std::endl;
out << std::endl;
out << "retry_histogram_absolute: " << m_retryProfileHisto
<< std::endl;
out << "retry_histogram_write: " << m_retryProfileHistoWrite
<< std::endl;
out << "retry_histogram_read: " << m_retryProfileHistoRead
<< std::endl;
out << "retry_histogram_percent: ";
m_retryProfileHisto.printPercent(out);
out << std::endl;
printSorted(out, m_num_of_sequencers, m_retryProfileMap,
"block_address", m_profiler);
out << std::endl;
}
}
void
AddressProfiler::clearStats()
{
// Clear the maps
m_sharing_miss_counter = 0;
m_dataAccessTrace.clear();
m_macroBlockAccessTrace.clear();
m_programCounterAccessTrace.clear();
m_retryProfileMap.clear();
m_retryProfileHisto.clear();
m_retryProfileHistoRead.clear();
m_retryProfileHistoWrite.clear();
m_getx_sharing_histogram.clear();
m_gets_sharing_histogram.clear();
}
void
AddressProfiler::profileGetX(Addr datablock, Addr PC,
const Set& owner, const Set& sharers,
NodeID requestor)
{
Set indirection_set;
indirection_set.addSet(sharers);
indirection_set.addSet(owner);
indirection_set.remove(requestor);
int num_indirections = indirection_set.count();
m_getx_sharing_histogram.add(num_indirections);
bool indirection_miss = (num_indirections > 0);
addTraceSample(datablock, PC, RubyRequestType_ST, RubyAccessMode(0),
requestor, indirection_miss);
}
void
AddressProfiler::profileGetS(Addr datablock, Addr PC,
const Set& owner, const Set& sharers,
NodeID requestor)
{
Set indirection_set;
indirection_set.addSet(owner);
indirection_set.remove(requestor);
int num_indirections = indirection_set.count();
m_gets_sharing_histogram.add(num_indirections);
bool indirection_miss = (num_indirections > 0);
addTraceSample(datablock, PC, RubyRequestType_LD, RubyAccessMode(0),
requestor, indirection_miss);
}
void
AddressProfiler::addTraceSample(Addr data_addr, Addr pc_addr,
RubyRequestType type,
RubyAccessMode access_mode, NodeID id,
bool sharing_miss)
{
if (m_all_instructions) {
if (sharing_miss) {
m_sharing_miss_counter++;
}
// record data address trace info
data_addr = makeLineAddress(data_addr);
lookupTraceForAddress(data_addr, m_dataAccessTrace).
update(type, access_mode, id, sharing_miss);
// record macro data address trace info
// 6 for datablock, 4 to make it 16x more coarse
Addr macro_addr = mbits<Addr>(data_addr, 63, 10);
lookupTraceForAddress(macro_addr, m_macroBlockAccessTrace).
update(type, access_mode, id, sharing_miss);
// record program counter address trace info
lookupTraceForAddress(pc_addr, m_programCounterAccessTrace).
update(type, access_mode, id, sharing_miss);
}
if (m_all_instructions) {
// This code is used if the address profiler is an
// all-instructions profiler record program counter address
// trace info
lookupTraceForAddress(pc_addr, m_programCounterAccessTrace).
update(type, access_mode, id, sharing_miss);
}
}
void
AddressProfiler::profileRetry(Addr data_addr, AccessType type, int count)
{
m_retryProfileHisto.add(count);
if (type == AccessType_Read) {
m_retryProfileHistoRead.add(count);
} else {
m_retryProfileHistoWrite.add(count);
}
if (count > 1) {
lookupTraceForAddress(data_addr, m_retryProfileMap).addSample(count);
}
}
} // namespace ruby
} // namespace gem5