95 lines
3.9 KiB
C++
95 lines
3.9 KiB
C++
/*******************************************************************************
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* Copyright (C) 2017, MINRES Technologies GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Contributors:
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* eyck@minres.com - initial API and implementation
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******************************************************************************/
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#include "iss/plugin/cycle_estimate.h"
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#include <iss/arch_if.h>
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#include <util/logging.h>
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#include <fstream>
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iss::plugin::cycle_estimate::cycle_estimate(std::string config_file_name)
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: arch_instr(nullptr)
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{
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if (config_file_name.length() > 0) {
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std::ifstream is(config_file_name);
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if (is.is_open()) {
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try {
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is >> root;
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} catch (Json::RuntimeError &e) {
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LOG(ERR) << "Could not parse input file " << config_file_name << ", reason: " << e.what();
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}
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} else {
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LOG(ERR) << "Could not open input file " << config_file_name;
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}
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}
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}
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iss::plugin::cycle_estimate::~cycle_estimate() {
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}
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bool iss::plugin::cycle_estimate::registration(const char* const version, vm_if& vm) {
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arch_instr = vm.get_arch()->get_instrumentation_if();
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if(!arch_instr) return false;
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const std::string core_name = arch_instr->core_type_name();
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Json::Value &val = root[core_name];
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if(!val.isNull() && val.isArray()){
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delays.reserve(val.size());
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for(auto it:val){
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auto name = it["name"];
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auto size = it["size"];
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auto delay = it["delay"];
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if(!name.isString() || !size.isUInt() || !(delay.isUInt() || delay.isArray())) throw std::runtime_error("JSON parse error");
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if(delay.isUInt()){
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delays.push_back(instr_desc{size.asUInt(), delay.asUInt(), 0});
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} else {
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delays.push_back(instr_desc{size.asUInt(), delay[0].asUInt(), delay[1].asUInt()});
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}
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}
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} else {
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LOG(ERR)<<"plugin cycle_estimate: could not find an entry for "<<core_name<<" in JSON file"<<std::endl;
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}
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return true;
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}
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void iss::plugin::cycle_estimate::callback(instr_info_t instr_info, exec_info const&) {
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assert(arch_instr && "No instrumentation interface available but callback executed");
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auto entry = delays[instr_info.instr_id];
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bool taken = (arch_instr->get_next_pc()-arch_instr->get_pc()) != (entry.size/8);
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if (taken && entry.taken > 1)
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arch_instr->set_curr_instr_cycles(entry.taken);
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else if (entry.not_taken > 1)
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arch_instr->set_curr_instr_cycles(entry.not_taken);
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}
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