#include <algorithm>
#include <tr1/functional>
#include <iterator>
-#include <numeric>
#include <stdexcept>
#include <sstream>
#include <xbt/log.h>
#include "misc.h"
#include "options.h"
+#include "tracing.h"
#include "process.h"
process::process(int argc, char* argv[])
{
- if (argc < 2 || !(std::istringstream(argv[1]) >> load))
+ if (argc < 2 || !(std::istringstream(argv[1]) >> real_load))
throw std::invalid_argument("bad or missing initial load parameter");
neigh.assign(argv + 2, argv + argc);
rev_neigh.insert(std::make_pair(host, ptr));
}
- prev_load_broadcast = -1; // force sending of load on first send()
- expected_load = load;
- total_load_running += load;
- total_load_init += load;
+ comp = 0.0;
+
+ prev_load_broadcast = -1; // force sending of load on first send_all()
+ expected_load = real_load;
+ total_load_running += real_load;
+ total_load_init += real_load;
ctrl_close_pending = data_close_pending = neigh.size();
close_received = false;
- may_receive = (neigh.size() > 0); // the same as (ctrl_close_pending ||
- // data_close_pending)
finalizing = false;
+ comp_iter = lb_iter = 0;
+
e_xbt_log_priority_t logp = xbt_log_priority_verbose;
if (!LOG_ISENABLED(logp))
return;
process::~process()
{
- total_load_exit += load;
+ total_load_exit += real_load;
+ if (opt::bookkeeping) {
+ INFO4("Final load after %d:%d iterations: %g ; expected: %g",
+ lb_iter, comp_iter, real_load, expected_load);
+ } else {
+ INFO2("Final load after %d iterations: %g",
+ lb_iter, real_load);
+ if (lb_iter != comp_iter)
+ WARN2("lb_iter (%d) and comp_iter (%d) differ!",
+ lb_iter, comp_iter);
+ }
+ VERB1("Total computation for this process: %g", comp);
}
int process::run()
{
- INFO1("Initial load: %g", load);
+ double next_iter_after_date = 0.0;
+ INFO1("Initial load: %g", real_load);
VERB0("Starting...");
- comp_iter = lb_iter = 0;
while (true) {
- if (load > 0.0) {
- ++comp_iter;
- if (opt::log_rate && comp_iter % opt::log_rate == 0) {
+ if (get_load() > 0.0) {
+ double now = MSG_get_clock();
+ if (now < next_iter_after_date)
+ MSG_process_sleep(next_iter_after_date - now);
+ next_iter_after_date = MSG_get_clock() + opt::min_iter_duration;
+
+ ++lb_iter;
+
+ if (opt::log_rate && lb_iter % opt::log_rate == 0) {
if (opt::bookkeeping)
INFO4("(%u:%u) current load: %g ; expected: %g",
- comp_iter, lb_iter, load, expected_load);
+ lb_iter, comp_iter, real_load, expected_load);
else
INFO2("(%u) current load: %g",
- comp_iter, load);
+ lb_iter, real_load);
}
- if (opt::bookkeeping)
- expected_load -= load_balance(expected_load);
- else
- load -= load_balance(load);
+ load_balance();
print_loads(true, xbt_log_priority_debug);
+ }
- send();
+ // send load information, and load (data) if any
+ send_all();
+ if (real_load > 0.0) {
+ ++comp_iter;
compute();
-
- } else {
- // send load information, and load when bookkeeping
- send();
}
- if (opt::comp_maxiter && comp_iter >= opt::comp_maxiter)
+ if (opt::lb_maxiter && lb_iter >= opt::lb_maxiter) {
+ VERB2("Reached lb_maxiter: %d/%d", lb_iter, opt::lb_maxiter);
+ break;
+ }
+ if (opt::comp_maxiter && comp_iter >= opt::comp_maxiter) {
+ VERB2("Reached comp_maxiter: %d/%d", comp_iter, opt::comp_maxiter);
break;
- if (opt::lb_maxiter && lb_iter >= opt::lb_maxiter)
+ }
+ if (opt::time_limit && MSG_get_clock() >= opt::time_limit) {
+ VERB2("Reached time limit: %g/%g", MSG_get_clock(), opt::time_limit);
break;
+ }
// block on receiving unless there is something to compute or
// to send
- bool recv_wait = (load == 0 &&
- ((opt::bookkeeping ? expected_load : load)
- == prev_load_broadcast));
- receive(recv_wait? WAIT: NO_WAIT);
+ double timeout;
+ if (real_load != 0 || get_load() != prev_load_broadcast)
+ timeout = 0.0;
+ else if (opt::min_iter_duration)
+ timeout = opt::min_iter_duration;
+ else
+ timeout = 1.0;
+ receive(timeout);
// one of our neighbor is finalizing
- if (opt::exit_on_close && close_received)
+ if (opt::exit_on_close && close_received) {
+ VERB0("Close received");
break;
+ }
// have no load and cannot receive anything
- if (load == 0.0 && !may_receive)
+ if (real_load == 0.0 && !may_receive()) {
+ VERB0("I'm a poor lonesome process, and I have no load...");
break;
+ }
// fixme: this check should be implemented with a distributed
// algorithm, and not a shared global variable!
// fixme: should this chunk be moved before call to receive() ?
if (100.0 * total_load_running / total_load_init <=
opt::load_ratio_threshold) {
- VERB0("No more load to balance in system, stopping.");
+ VERB0("No more load to balance in system.");
break;
+ } else {
+ DEBUG1("still %g load to balance, continuing...", total_load_running);
}
-
}
VERB0("Going to finalize...");
finalize();
*/
VERB0("Done.");
- INFO3("Final load after %d iteration%s: %g",
- comp_iter, ESSE(comp_iter), load);
- if (opt::bookkeeping)
- INFO1("Expected load: %g", expected_load);
return 0;
}
-double process::sum_of_to_send() const
-{
- using std::tr1::bind;
- using std::tr1::placeholders::_1;
- using std::tr1::placeholders::_2;
-
- return std::accumulate(neigh.begin(), neigh.end(), 0.0,
- bind(std::plus<double>(),
- _1, bind(&neighbor::get_to_send, _2)));
-}
-
-double process::load_balance(double /*my_load*/)
+void process::load_balance()
{
if (lb_iter == 1) // warn only once
- WARN0("process::load_balance is a no-op!");
- return 0.0;
+ WARN0("process::load_balance() is a no-op!");
}
void process::compute()
{
- if (load > 0.0) {
- double duration = opt::comp_cost(load);
- m_task_t task = MSG_task_create("computation", duration, 0.0, NULL);
- DEBUG2("compute %g flop%s", duration, ESSE(duration));
+ if (real_load > 0.0) {
+ double flops = opt::comp_cost(real_load);
+ m_task_t task = MSG_task_create("computation", flops, 0.0, NULL);
+ TRACE_msg_set_task_category(task, TRACE_CAT_COMP);
+ DEBUG2("compute %g flop%s", flops, ESSE(flops));
MSG_task_execute(task);
+ comp += flops;
MSG_task_destroy(task);
} else {
DEBUG0("nothing to compute !");
}
}
+void process::send(neighbor& nb, double amount)
+{
+ set_load(get_load() - amount);
+ nb.set_to_send(nb.get_to_send() + amount);
+ nb.set_load(nb.get_load() + amount); // fixme: make this optional?
+}
+
void process::send1_no_bookkeeping(neighbor& nb)
{
- if (load != prev_load_broadcast)
- comm.send(nb.get_ctrl_mbox(), new message(message::INFO, load));
+ if (real_load != prev_load_broadcast)
+ comm.send(nb.get_ctrl_mbox(), new message(message::INFO, real_load));
double load_to_send = nb.get_to_send();
if (load_to_send > 0.0) {
comm.send(nb.get_data_mbox(), new message(message::LOAD, load_to_send));
} else {
new_debt = nb.get_debt();
}
- if (load <= new_debt) {
- load_to_send = load;
+ if (real_load <= new_debt) {
+ load_to_send = real_load;
nb.set_debt(new_debt - load_to_send);
- load = 0.0;
+ real_load = 0.0;
} else {
load_to_send = new_debt;
nb.set_debt(0.0);
- load -= load_to_send;
+ real_load -= load_to_send;
}
if (load_to_send > 0.0)
comm.send(nb.get_data_mbox(), new message(message::LOAD, load_to_send));
}
-void process::send()
+void process::send_all()
{
using std::tr1::bind;
using std::tr1::placeholders::_1;
} else {
std::for_each(neigh.begin(), neigh.end(),
bind(&process::send1_no_bookkeeping, this, _1));
- prev_load_broadcast = load;
+ prev_load_broadcast = real_load;
}
+ comm.flush(false);
}
-void process::receive(recv_wait_mode wait)
+void process::receive(double timeout)
{
message* msg;
m_host_t from;
- DEBUG1("go for receive(%s)",
- "NO_WAIT\0WAIT\0\0\0\0WAIT_FOR_CLOSE" + 8 * wait);
-
- bool do_wait = (wait != NO_WAIT);
- while (may_receive && comm.recv(msg, from, do_wait)) {
+ DEBUG2("%sblocking receive (%g)", "\0non-" + !timeout, timeout);
+ while (may_receive() && comm.recv(msg, from, timeout)) {
switch (msg->get_type()) {
case message::INFO: {
neighbor* n = rev_neigh[from];
break;
case message::LOAD: {
double ld = msg->get_amount();
- load += ld;
+ real_load += ld;
if (finalizing)
total_load_running -= ld;
break;
}
case message::CTRL_CLOSE:
ctrl_close_pending--;
- DEBUG1("ctrl_close_pending = %d", ctrl_close_pending);
close_received = true;
break;
case message::DATA_CLOSE:
data_close_pending--;
- DEBUG1("data_close_pending = %d", data_close_pending);
close_received = true;
break;
}
delete msg;
- may_receive = (ctrl_close_pending || data_close_pending);
- do_wait = (wait == WAIT_FOR_CLOSE);
+ timeout = 0.0; // only wait on first recv
}
+ comm.flush(false);
}
void process::finalize1(neighbor& nb)
using std::tr1::placeholders::_1;
finalizing = true;
- total_load_running -= load;
+ total_load_running -= real_load;
DEBUG2("send CLOSE to %lu neighbor%s",
(unsigned long )neigh.size(), ESSE(neigh.size()));
std::for_each(neigh.begin(), neigh.end(),
bind(&process::finalize1, this, _1));
- DEBUG2("wait for CLOSE from %lu neighbor%s",
- (unsigned long )neigh.size(), ESSE(neigh.size()));
- receive(WAIT_FOR_CLOSE);
+ while (may_receive()) {
+ comm.flush(false);
+ DEBUG2("waiting for %d CTRL and %d DATA CLOSE",
+ ctrl_close_pending, data_close_pending);
+ receive(-1.0);
+ }
comm.flush(true);
}
