#ifndef SIMGRID_MC_BASICSTRATEGY_HPP
#define SIMGRID_MC_BASICSTRATEGY_HPP
-#include "src/mc/transition/Transition.hpp"
+#include "Strategy.hpp"
+#include "src/mc/explo/Exploration.hpp"
+
+XBT_LOG_EXTERNAL_CATEGORY(mc_dfs);
namespace simgrid::mc {
-/** Basic MC guiding class which corresponds to no guide at all (random choice) */
+/** Basic MC guiding class which corresponds to no guide. When asked for different states
+ * it will follow a depth first search politics to minize the number of opened states. */
class BasicStrategy : public Strategy {
-public:
- void operator=(const BasicStrategy& other) { this->penalties_ = other.penalties_; }
+ int depth_ = _sg_mc_max_depth; // Arbitrary starting point. next_transition must return a positive value to work with
+ // threshold in DFSExplorer
- std::pair<aid_t, double> best_transition(bool need_to_be_todo) const
+public:
+ void copy_from(const Strategy* strategy) override
{
- auto min = std::make_pair(-1, 10000);
+ const auto* cast_strategy = dynamic_cast<BasicStrategy const*>(strategy);
+ xbt_assert(cast_strategy != nullptr);
+ depth_ = cast_strategy->depth_ - 1;
+ if (depth_ <= 0) {
+ XBT_CERROR(mc_dfs,
+ "The exploration reached a depth greater than %d. Change the depth limit with "
+ "--cfg=model-check/max-depth. Here are the 100 first trace elements",
+ _sg_mc_max_depth.get());
+ auto trace = Exploration::get_instance()->get_textual_trace(100);
+ for (auto const& elm : trace)
+ XBT_CERROR(mc_dfs, " %s", elm.c_str());
+ xbt_die("Aborting now.");
+ }
+ }
+ BasicStrategy() = default;
+ ~BasicStrategy() override = default;
+
+ std::pair<aid_t, int> best_transition(bool must_be_todo) const override {
for (auto const& [aid, actor] : actors_to_run_) {
/* Only consider actors (1) marked as interleaving by the checker and (2) currently enabled in the application */
- if ((not actor.is_todo() and need_to_be_todo) || not actor.is_enabled() || actor.is_done()) {
+ if ((not actor.is_todo() && must_be_todo) || not actor.is_enabled() || actor.is_done())
continue;
- }
- if (actor.get_transition(actor.get_times_considered())->type_ != Transition::Type::TESTANY)
- return std::make_pair(aid, 0.0);
- double dist;
- auto iterator = penalties_.find(aid);
- if (iterator != penalties_.end())
- dist = (*iterator).second;
- else
- dist = 0;
- if (dist < min.second)
- min = std::make_pair(aid, dist);
+ return std::make_pair(aid, depth_);
}
- if (min.first == -1)
- return std::make_pair(-1, -1000);
- return min;
- }
-
- std::pair<aid_t, double> next_transition() const override { return best_transition(true); }
-
- void execute_next(aid_t aid, RemoteApp& app) override
- {
- auto actor = actors_to_run_.at(aid);
- if (actor.get_transition(actor.get_times_considered())->type_ == Transition::Type::TESTANY)
- penalties_[aid] = penalties_[aid] + 1.0;
- return;
+ return std::make_pair(-1, depth_);
}
- void consider_best() override
- {
- const auto& [aid, _] = this->best_transition(false);
- auto actor = actors_to_run_.find(aid);
- if (actor != actors_to_run_.end()) {
- actor->second.mark_todo();
- return;
- }
- for (auto& [_, actor] : actors_to_run_) {
- if (actor.is_todo())
- return;
- if (actor.is_enabled() and not actor.is_done()) {
- actor.mark_todo();
- return;
- }
- }
- }
+ void execute_next(aid_t aid, RemoteApp& app) override { return; }
};
} // namespace simgrid::mc
