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dc_consensus_test.cpp
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126 lines (109 loc) · 3.13 KB
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/**
* Copyright (c) 2009 Carnegie Mellon University.
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an "AS
* IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*
* For more about this software visit:
*
* http://www.graphlab.ml.cmu.edu
*
*/
#include <iostream>
#include <string>
#include <map>
#include <graphlab/rpc/dc.hpp>
#include <graphlab/util/mpi_tools.hpp>
#include <graphlab/rpc/dc_init_from_mpi.hpp>
#include <graphlab/util/blocking_queue.hpp>
#include <graphlab/rpc/async_consensus.hpp>
using namespace graphlab;
class simple_engine_test {
public:
dc_dist_object<simple_engine_test> rmi;
blocking_queue<size_t> queue;
async_consensus cons;
atomic<size_t> numactive;;
simple_engine_test(distributed_control &dc):rmi(dc, this), cons(dc, 4) {
numactive.value = 4;
dc.barrier();
}
void add_task_local(size_t i) {
queue.enqueue(i);
if (numactive.value < 4) cons.cancel();
}
void task(size_t i) {
if (i < 5) std::cout << "Task " << i << std::endl;
if (i > 0) {
if (rmi.numprocs() == 1) {
add_task_local(i - 1);
}
else {
rmi.remote_call((procid_t)((rmi.procid() + 1) % rmi.numprocs()),
&simple_engine_test::add_task_local,
i - 1);
}
}
}
bool try_terminate(size_t cpuid, std::pair<size_t, bool> &job) {
job.second = false;
numactive.dec();
cons.begin_done_critical_section(cpuid);
job = queue.try_dequeue();
if (job.second == false) {
bool ret = cons.end_done_critical_section(cpuid);
numactive.inc();
return ret;
}
else {
cons.cancel_critical_section(cpuid);
numactive.inc();
return false;
}
}
void thread(size_t cpuid) {
while(1) {
std::pair<size_t, bool> job = queue.try_dequeue();
if (job.second == false) {
bool ret = try_terminate(cpuid, job);
if (ret == true) break;
if (ret == false && job.second == false) continue;
}
task(job.first);
}
}
void start_thread() {
thread_group thrgrp;
for (size_t i = 0;i < 4; ++i) {
thrgrp.launch(boost::bind(
&simple_engine_test::thread,
this, i));
}
thrgrp.join();
ASSERT_EQ(queue.size(), 0);
}
};
int main(int argc, char ** argv) {
/** Initialization */
mpi_tools::init(argc, argv);
global_logger().set_log_level(LOG_DEBUG);
dc_init_param param;
if (init_param_from_mpi(param) == false) {
return 0;
}
distributed_control dc(param);
simple_engine_test test(dc);
test.add_task_local(1000);
test.start_thread();
mpi_tools::finalize();
}