void memory_release_loop() {
memory_release_lock.lock();
while (!stop_memory_release_thread) {
memory_release_cond.timedwait(memory_release_lock, 15);
MallocExtension::instance()->ReleaseFreeMemory();
}
memory_release_lock.unlock();
}
void callback(graphlab::vertex_id_type v) {
//logstream(LOG_INFO) << "Locked " << ggraph->global_vid(v) << std::endl;
mt.lock();
ASSERT_EQ(current_demand_set[v], 1);
locked_set[v]++;
nlocksacquired++;
mt.unlock();
// graphlab::my_sleep(1);
locked_elements.enqueue(v);
}
void thread_stuff() {
std::pair<graphlab::vertex_id_type, bool> deq;
while(1) {
deq = locked_elements.dequeue();
if (deq.second == false) break;
else {
locks->philosopher_stops_eating(deq.first);
mt.lock();
current_demand_set[deq.first] = 0;
bool getnextlock = nlocks_to_acquire > 0;
if (nlocks_to_acquire > 0) {
nlocks_to_acquire--;
if (nlocks_to_acquire % 100 == 0) {
std::cout << "Remaining: " << nlocks_to_acquire << std::endl;
}
}
if (nlocks_to_acquire == 0 &&
nlocksacquired == INITIAL_NLOCKS_TO_ACQUIRE + lockable_vertices.size()) cond.signal();
mt.unlock();
if (getnextlock > 0) {
graphlab::vertex_id_type toacquire = 0;
while(1) {
mt.lock();
toacquire = lockable_vertices[graphlab::random::rand() %
lockable_vertices.size()];
if (current_demand_set[toacquire] == 0) {
current_demand_set[toacquire] = 1;
demand_set[toacquire]++;
mt.unlock();
break;
}
mt.unlock();
}
locks->make_philosopher_hungry(toacquire);
}
}
}
}
/* Obtain a backtrace and print it to ofile. */
void __print_back_trace() {
void *array[1024];
size_t size, i;
char **strings;
back_trace_file_lock.lock();
if (write_error) {
back_trace_file_lock.unlock();
return;
}
char filename[1024];
sprintf(filename, "backtrace.%d", int(graphlab::dc_impl::get_last_dc_procid()));
FILE* ofile = NULL;
if (write_count == 0) {
ofile = fopen(filename, "w");
}
else {
ofile = fopen(filename, "a");
}
// if unable to open the file for output
if (ofile == NULL) {
// print an error, set the error flag so we don't ever print it again
fprintf(stderr, "Unable to open output backtrace file.\n");
write_error = 1;
back_trace_file_lock.unlock();
return;
}
++write_count;
size = backtrace(array, 1024);
strings = backtrace_symbols(array, size);
fprintf(ofile, "Pointers\n");
fprintf(ofile, "------------\n");
for (i = 0; i < size; ++i) {
fprintf(ofile, "%p\n", array[i]);
}
fprintf(ofile, "Raw\n");
fprintf(ofile, "------------\n");
for (i = 0; i < size; ++i) {
fprintf(ofile, "%s\n", strings[i]);
}
fprintf(ofile, "\nDemangled\n");
fprintf(ofile, "------------\n");
for (i = 0; i < size; ++i) {
std::string ret = demangle(strings[i]);
fprintf(ofile, "%s\n", ret.c_str());
}
free(strings);
fprintf(ofile, "\n\n\n\n\n\n\n\n\n\n\n\n\n");
fclose(ofile);
back_trace_file_lock.unlock();
}