/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-/* This example shows how to simulate a non-linear resource sharing for
- * network links.
+/* This example validates the behaviour in presence of node and link fault.
+ * Each test scenario consists in one host/actor (named sender) sending one message to another host/actor.
+ * The space to cover is quite large, since we consider:
+ * * communication types (eager, rendez-vous, one-sided=detached)
+ * * use type (synchronous, asynchronous, init)
+ * * fault type (sender node, link, receiver node)
+ * * any legal permutation of the scenario steps
+ *
+ * This program also presents a way to simulate applications that are resilient to links and node faults.
+ * Essentially, it catches exceptions related to communications and it clears the mailboxes when one of the nodes gets turned off.
+ * However, this model would suppose that there would be 2 mailboxes for each pair of nodes, which is probably unacceptable.
+ *
*/
#include <algorithm>
#include <time.h>
#include <vector>
-
-//#include "../../src/kernel/activity/ActivityImpl.hpp"
-
namespace sg4 = simgrid::s4u;
namespace pr = simgrid::kernel::profile;
/*************************************************************************************************/
// Constants for platform configuration
-
constexpr double HostComputePower = 1e9; // FLOPs
constexpr double LinkBandwidth = 1e9; // Bytes/second
constexpr double LinkLatency = 1e-6; // Seconds
// Constants for application behaviour
-
constexpr uint64_t MsgSize = LinkBandwidth / 2;
/*************************************************************************************************/
RDV_ASYNC,
RDV_INIT,
ONESIDE_SYNC,
- ONESIDE_ASYNC,
- ONESIDE_INIT
+ ONESIDE_ASYNC
+ //ONESIDE_INIT is equivalent to ONESIDE_ASYNC
};
enum class Action { SLEEP, PUT, GET, START, WAIT, DIE, END };
static const char* to_string(const Action x)
{
-
switch (x) {
case Action::END:
return "Success";
static std::string to_string(const Scenario& s)
{
-
std::stringstream ss;
ss <<"#"<< s.index << "[" << s.start_time << "s," << s.start_time + s.duration << "s[: (";
switch (s.type) {
case CommType::ONESIDE_ASYNC:
ss << "ONESIDE_ASYNC";
break;
- case CommType::ONESIDE_INIT:
- ss << "ONESIDE_INIT";
- break;
}
+
ss << ") Expected: S:" << to_string(s.snd_expected) << " R:" << to_string(s.rcv_expected) << " Steps: ";
for (const Step& step : s.steps) {
ss << "+" << step.rel_time << "s:";
}
ss << " ";
}
-
return ss.str().c_str();
}
std::vector<Scenario> scenarios;
-
sg4::Mailbox* mbox_eager = nullptr;
sg4::Mailbox* mbox_rdv = nullptr;
static int run;
static size_t scenario;
-
int id;
sg4::Host* other_host;
return nullptr;
case CommType::ONESIDE_ASYNC:
return sg4::Comm::sendto_async(sg4::this_actor::get_host(), other_host, MsgSize);
- case CommType::ONESIDE_INIT:
- return sg4::Comm::sendto_init()->set_payload_size(MsgSize);
- // FIXME: how to set hosts? sg4::this_actor::get_host(),other_host
}
return nullptr;
}
XBT_DEBUG("Will try: %s", scenario_string.c_str());
double send_value;
sg4::CommPtr comm = nullptr;
- // CommType type=s.type;
Action expected = s.snd_expected;
double end_time = s.start_time + s.duration;
- // double curr_rel_time=0;
send_value = end_time;
size_t step_index = 0;
sg4::this_actor::sleep_until(s.start_time);
+
+ //Make sure we have a clean slate
+ xbt_assert(not mbox_eager->listen(),"Eager mailbox should be empty when starting a test");
+ xbt_assert(not mbox_rdv->listen(),"RDV mailbox should be empty when starting a test");
+
for (; step_index < s.steps.size(); step_index++) {
const Step& step = s.steps[step_index];
if (step.entity != Step::SND || step.type != Step::ACTION)
typeid(e).name(), e.what());
break;
}
-
- //xbt_assert(comm->get_impl()->get_refcount()==1);
}
try {
XBT_DEBUG("During Sleep, failed to send message because of a %s exception (%s)", typeid(e).name(), e.what());
}
- Action outcome = Action::END;
+ Action outcome = Action::END;
if (step_index < s.steps.size()) {
const Step& step = s.steps[step_index];
assert(step.entity == Step::SND && step.type == Step::ACTION);
static int run;
static size_t scenario;
-
int id;
sg4::Host* other_host;
return mbox_eager->get_async(&receive_ptr);
case CommType::EAGER_INIT:
return mbox_eager->get_init()->set_dst_data((void**)(&receive_ptr));
-
case CommType::RDV_SYNC:
receive_ptr = mbox_rdv->get<double>();
return nullptr;
return mbox_rdv->get_async(&receive_ptr);
case CommType::RDV_INIT:
return mbox_rdv->get_init()->set_dst_data((void**)(&receive_ptr));
-
case CommType::ONESIDE_SYNC:
case CommType::ONESIDE_ASYNC:
- case CommType::ONESIDE_INIT:
xbt_die("No get in One Sided comunications!");
}
return nullptr;
CommType type = s.type;
Action expected = s.rcv_expected;
double end_time = s.start_time + s.duration;
- // double curr_rel_time=0;
double* receive_ptr = nullptr;
size_t step_index = 0;
sg4::this_actor::sleep_until(s.start_time);
+
+ //Make sure we have a clean slate
+ xbt_assert(not mbox_eager->listen(),"Eager mailbox should be empty when starting a test");
+ xbt_assert(not mbox_rdv->listen(),"RDV mailbox should be empty when starting a test");
+
for (; step_index < s.steps.size(); step_index++) {
const Step& step = s.steps[step_index];
if (step.entity != Step::RCV || step.type != Step::ACTION)
const Step& step = s.steps[step_index];
assert(step.entity == Step::RCV && step.type == Step::ACTION);
outcome = step.action_type;
- } else if (receive_ptr == nullptr) {
- XBT_ERROR("Received address is NULL in %s", scenario_string.c_str());
- } else if (*receive_ptr != end_time) {
- XBT_ERROR("Received value invalid: expected %f but got %f in %s", end_time, *receive_ptr,
+ } else if (s.type!=CommType::ONESIDE_SYNC &&
+ s.type!=CommType::ONESIDE_ASYNC
+ ) {
+ //One sided / detached operations do not actually transfer anything
+ if(receive_ptr == nullptr ) {
+ XBT_ERROR("Received address is NULL in %s", scenario_string.c_str());
+ } else if (*receive_ptr != end_time) {
+ XBT_ERROR("Received value invalid: expected %f but got %f in %s", end_time, *receive_ptr,
scenario_string.c_str());
+ }
}
if (outcome != expected) {
} else {
XBT_DEBUG("OK: %s", scenario_string.c_str());
}
- sg4::this_actor::sleep_until(end_time);
+ sg4::this_actor::sleep_until(end_time);
xbt_assert(not mbox_eager->listen(), "Mailbox should not have ongoing communication!");
xbt_assert(not mbox_rdv->listen(), "Mailbox should not have ongoing communication!");
-
}
public:
static void on_host_state_change(sg4::Host const& host)
{
XBT_DEBUG("Host %s is now %s", host.get_cname(), host.is_on() ? "ON " : "OFF");
- if(host.is_on()) {
+ if(not host.is_on()) {
mbox_eager->clear();
mbox_rdv->clear();
}
static int prepareScenario(CommType type, int& index, double& start_time, double duration, std::ostream& sndP, std::ostream& rcvP,
std::ostream& lnkP, Action snd_expected, Action rcv_expected, std::vector<Step> steps, std::vector<int> active_indices)
{
-
int ret=0;
if(std::find(active_indices.begin(),active_indices.end(),index)!=active_indices.end()) {
// Update fault profiles
mbox_eager = e.mailbox_by_name_or_create("eager");
mbox_rdv = e.mailbox_by_name_or_create("rdv");
-
sg4::NetZone* zone = sg4::create_full_zone("Top");
-
pr::Profile* profile_sender = pr::ProfileBuilder::from_string("sender_profile", SndStateProfile, 0);
sg4::Host* sender_host = zone->create_host("senderHost", HostComputePower)->set_state_profile(profile_sender)->seal();
pr::Profile* profile_receiver = pr::ProfileBuilder::from_string("receiver_profile", RcvStateProfile, 0);
sg4::Host* receiver_host = zone->create_host("receiverHost", HostComputePower)->set_state_profile(profile_receiver)->seal();
-
sg4::ActorPtr sender = sg4::Actor::create("sender", sender_host, SendAgent(0, receiver_host));
sender->set_auto_restart(true);
-
sg4::ActorPtr receiver = sg4::Actor::create("receiver", receiver_host, ReceiveAgent(1, sender_host));
receiver->set_auto_restart(true);
-
pr::Profile* profile_link = pr::ProfileBuilder::from_string("link_profile", LnkStateProfile, 0);
sg4::Link* link =
zone->create_link("link", LinkBandwidth)->set_latency(LinkLatency)->set_state_profile(profile_link)->seal();
-
zone->add_route(sender_host->get_netpoint(), receiver_host->get_netpoint(), nullptr, nullptr,
{sg4::LinkInRoute{link}}, false);
zone->seal();
-
sg4::Host::on_state_change.connect(on_host_state_change);
sg4::Link::on_state_change_cb(on_link_state_change);
e.run_until(end_time);
+ //Make sure we have a clean slate
+ xbt_assert(not mbox_eager->listen(),"Eager mailbox should be empty in the end");
+ xbt_assert(not mbox_rdv->listen(),"RDV mailbox should be empty in the end");
return 0;
}
// Receiver off
_MK(RDV_SYNC, 2, PUT, DIE, ROFF(.1), SPUT(.2), RON(1));
- _MK(RDV_SYNC, 2, PUT, DIE, SPUT(.2), ROFF(.3), RON(1));
+ _MK(RDV_SYNC, 2, PUT, DIE, SPUT(.2), ROFF(.3), RON(1)); //Fails because put comm cancellation does not trigger sender exception
_MK(RDV_SYNC, 2, PUT, DIE, SPUT(.2), RGET(.4), ROFF(.5), RON(1));
_MK(RDV_SYNC, 2, PUT, DIE, RGET(.2), SPUT(.4), ROFF(.5), RON(1));
// Sender off
_MK(RDV_ASYNC, 2, PUT, DIE, ROFF(.1), SPUT(.2), SWAT(.4), RON(1));
_MK(RDV_ASYNC, 2, WAIT, DIE, SPUT(.2), ROFF(.3), SWAT(.4), RON(1));
_MK(RDV_ASYNC, 2, PUT, DIE, RGET(.2), ROFF(.3), SPUT(.4), SWAT(.6), RON(1));
- _MK(RDV_ASYNC, 2, WAIT, DIE, SPUT(.2), SWAT(.4), ROFF(.5), RON(1));
+ _MK(RDV_ASYNC, 2, WAIT, DIE, SPUT(.2), SWAT(.4), ROFF(.5), RON(1)); //Fails because put comm cancellation does not trigger sender exception
_MK(RDV_ASYNC, 2, WAIT, DIE, SPUT(.2), RGET(.4), ROFF(.5), SWAT(.6), RON(1));
_MK(RDV_ASYNC, 2, WAIT, DIE, RGET(.2), SPUT(.4), ROFF(.5), SWAT(.6), RON(1));
_MK(RDV_ASYNC, 2, PUT , DIE, RGET(.2), RWAT(.4), ROFF(.5), SPUT(.6), SWAT(.8), RON(1));
// Receiver off
_MK(ONESIDE_SYNC, 2, PUT, DIE, ROFF(.1), SPUT(.2), RON(1));
_MK(ONESIDE_SYNC, 2, PUT, DIE, SPUT(.2), ROFF(.3), RON(1));
+ // Sender off
+ _MK(ONESIDE_SYNC, 2, DIE, END, SPUT(.2), SOFF(.3), SON(1));
// Link off
- _MK(ONESIDE_SYNC, 2, PUT, GET, LOFF(.1), SPUT(.2), LON(1));
- _MK(ONESIDE_SYNC, 2, PUT, GET, SPUT(.2), LOFF(.3), LON(1));
+ _MK(ONESIDE_SYNC, 2, PUT, END, LOFF(.1), SPUT(.2), LON(1));
+ _MK(ONESIDE_SYNC, 2, PUT, END, SPUT(.2), LOFF(.3), LON(1));
// ONESIDE ASYNC use cases
// All good
_MK(ONESIDE_ASYNC, 2, PUT, DIE, ROFF(.1), SPUT(.2), SWAT(.4), RON(1));
_MK(ONESIDE_ASYNC, 2, WAIT, DIE, SPUT(.2), ROFF(.3), SWAT(.4), RON(1));
_MK(ONESIDE_ASYNC, 2, WAIT, DIE, SPUT(.2), SWAT(.4), ROFF(.5), RON(1));
+ // Sender off
+ _MK(ONESIDE_ASYNC, 2, DIE, END, SPUT(.2), SOFF(.3), SON(1));
// Link off
- _MK(ONESIDE_ASYNC, 2, WAIT, WAIT, LOFF(.1), SPUT(.2), SWAT(.4), LON(1));
- _MK(ONESIDE_ASYNC, 2, WAIT, WAIT, SPUT(.2), LOFF(.3), SWAT(.4), LON(1));
- _MK(ONESIDE_ASYNC, 2, WAIT, WAIT, SPUT(.2), SWAT(.4), LOFF(.5), LON(1));
+ _MK(ONESIDE_ASYNC, 2, WAIT, END, LOFF(.1), SPUT(.2), SWAT(.4), LON(1));
+ _MK(ONESIDE_ASYNC, 2, WAIT, END, SPUT(.2), LOFF(.3), SWAT(.4), LON(1));
+ _MK(ONESIDE_ASYNC, 2, WAIT, END, SPUT(.2), SWAT(.4), LOFF(.5), LON(1));
SndStateProfile = sndP.str();
