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add user friendly wrapper to set priorities on I/Os
[simgrid.git] / src / bindings / python / simgrid_python.cpp
index 09c0e4e..7530f38 100644 (file)
 #pragma GCC diagnostic ignored "-Wunused-value"
 #endif
 
-#ifndef NDEBUG
-/* Many tests are failing after pybind11 commit ad6bf5cd39ca64b4a9bf846b84b11c4c8df1c8e1 "Adding PyGILState_Check() in
- *  object_api<>::operator(). (#2919)".
- * See https://github.com/pybind/pybind11/commit/ad6bf5cd39ca64b4a9bf846b84b11c4c8df1c8e1
- *
- * The failing tests are mostly those with boost/raw/sysv contexts. As a workaround, define NDEBUG before pybind11
- * includes.
- */
-#define NDEBUG
-#define NDEBUG_LOCALLY_DEFINED
-#endif
-
 #include <pybind11/pybind11.h> // Must come before our own stuff
 
 #include <pybind11/functional.h>
 #include <pybind11/stl.h>
 
-#ifdef NDEBUG_LOCALLY_DEFINED
-#undef NDEBUG_LOCALLY_DEFINED
-#undef NDEBUG
-#endif
-
 #if defined(__GNUG__)
 #pragma GCC diagnostic pop
 #endif
@@ -44,6 +27,7 @@
 #include <simgrid/Exception.hpp>
 #include <simgrid/s4u/Actor.hpp>
 #include <simgrid/s4u/Comm.hpp>
+#include <simgrid/s4u/Disk.hpp>
 #include <simgrid/s4u/Engine.hpp>
 #include <simgrid/s4u/Exec.hpp>
 #include <simgrid/s4u/Host.hpp>
@@ -85,44 +69,6 @@ public:
   PyObject** get() const { return data.get(); }
 };
 
-/* Classes GilScopedAcquire and GilScopedRelease have the same purpose as pybind11::gil_scoped_acquire and
- * pybind11::gil_scoped_release.  Refer to the manual of pybind11 for details:
- * https://pybind11.readthedocs.io/en/stable/advanced/misc.html#global-interpreter-lock-gil
- *
- * The pybind11 versions are however too sophisticated (using TLS for example) and don't work well with all kinds of
- * contexts.
- * See also https://github.com/pybind/pybind11/issues/1276, which may be related.
- *
- * Briefly, GilScopedAcquire can be used on actor creation to acquire a new PyThreadState.  The PyThreadState has to be
- * released for context switches (i.e. before simcalls). That's the purpose of GilScopedRelease.
- *
- * Like their pybind11 counterparts, both classes use a RAII pattern.
- */
-class XBT_PRIVATE GilScopedAcquire {
-  static PyThreadState* acquire()
-  {
-    PyThreadState* state = PyThreadState_New(PyInterpreterState_Head());
-    PyEval_AcquireThread(state);
-    return state;
-  }
-  static void release(PyThreadState* state)
-  {
-    PyEval_ReleaseThread(state);
-    PyThreadState_Clear(state);
-    PyThreadState_Delete(state);
-  }
-
-  std::unique_ptr<PyThreadState, decltype(&release)> thread_state{acquire(), &release};
-
-public:
-  void reset() { thread_state.reset(); }
-};
-
-class XBT_PRIVATE GilScopedRelease {
-  std::unique_ptr<PyThreadState, decltype(&PyEval_RestoreThread)> thread_state{PyEval_SaveThread(),
-                                                                               &PyEval_RestoreThread};
-};
-
 } // namespace
 
 PYBIND11_DECLARE_HOLDER_TYPE(T, boost::intrusive_ptr<T>)
@@ -133,6 +79,9 @@ PYBIND11_MODULE(simgrid, m)
 
   m.attr("simgrid_version") = get_simgrid_version();
 
+  // Swapped contexts are broken, starting from pybind11 v2.8.0.  Use thread contexts by default.
+  simgrid::s4u::Engine::set_config("contexts/factory:thread");
+
   // Internal exception used to kill actors and sweep the RAII chimney (free objects living on the stack)
   static py::object pyForcefulKillEx(py::register_exception<simgrid::ForcefulKillException>(m, "ActorKilled"));
 
@@ -143,40 +92,38 @@ PYBIND11_MODULE(simgrid, m)
       .def(
           "error", [](const char* s) { XBT_ERROR("%s", s); }, "Display a logging message of 'error' priority.")
       .def("execute", py::overload_cast<double, double>(&simgrid::s4u::this_actor::execute),
-           py::call_guard<GilScopedRelease>(),
+           py::call_guard<py::gil_scoped_release>(),
            "Block the current actor, computing the given amount of flops at the given priority.", py::arg("flops"),
            py::arg("priority") = 1)
       .def("exec_init", py::overload_cast<double>(&simgrid::s4u::this_actor::exec_init),
-           py::call_guard<GilScopedRelease>())
+           py::call_guard<py::gil_scoped_release>())
       .def("get_host", &simgrid::s4u::this_actor::get_host, "Retrieves host on which the current actor is located")
-      .def("set_host", &simgrid::s4u::this_actor::set_host, py::call_guard<GilScopedRelease>(),
+      .def("set_host", &simgrid::s4u::this_actor::set_host, py::call_guard<py::gil_scoped_release>(),
            "Moves the current actor to another host.", py::arg("dest"))
       .def("sleep_for", static_cast<void (*)(double)>(&simgrid::s4u::this_actor::sleep_for),
-           py::call_guard<GilScopedRelease>(), "Block the actor sleeping for that amount of seconds.",
+           py::call_guard<py::gil_scoped_release>(), "Block the actor sleeping for that amount of seconds.",
            py::arg("duration"))
       .def("sleep_until", static_cast<void (*)(double)>(&simgrid::s4u::this_actor::sleep_until),
-           py::call_guard<GilScopedRelease>(), "Block the actor sleeping until the specified timestamp.",
+           py::call_guard<py::gil_scoped_release>(), "Block the actor sleeping until the specified timestamp.",
            py::arg("duration"))
-      .def("suspend", &simgrid::s4u::this_actor::suspend, py::call_guard<GilScopedRelease>(),
+      .def("suspend", &simgrid::s4u::this_actor::suspend, py::call_guard<py::gil_scoped_release>(),
            "Suspend the current actor, that is blocked until resume()ed by another actor.")
-      .def("yield_", &simgrid::s4u::this_actor::yield, py::call_guard<GilScopedRelease>(), "Yield the actor")
-      .def("exit", &simgrid::s4u::this_actor::exit, py::call_guard<GilScopedRelease>(), "kill the current actor")
+      .def("yield_", &simgrid::s4u::this_actor::yield, py::call_guard<py::gil_scoped_release>(), "Yield the actor")
+      .def("exit", &simgrid::s4u::this_actor::exit, py::call_guard<py::gil_scoped_release>(), "kill the current actor")
       .def(
           "on_exit",
           [](py::object fun) {
             fun.inc_ref(); // FIXME: why is this needed for tests like actor-kill and actor-lifetime?
             simgrid::s4u::this_actor::on_exit([fun](bool /*failed*/) {
-              GilScopedAcquire py_context; // need a new context for callback
               try {
+                py::gil_scoped_acquire py_context; // need a new context for callback
                 fun();
               } catch (const py::error_already_set& e) {
-                std::string what = e.what();
-                py_context.reset();
-                xbt_die("Error while executing the on_exit lambda: %s", what.c_str());
+                xbt_die("Error while executing the on_exit lambda: %s", e.what());
               }
             });
           },
-          py::call_guard<GilScopedRelease>(), "");
+          py::call_guard<py::gil_scoped_release>(), "");
 
   /* Class Engine */
   py::class_<Engine>(m, "Engine", "Simulation Engine")
@@ -192,13 +139,13 @@ PYBIND11_MODULE(simgrid, m)
       .def("get_all_hosts", &Engine::get_all_hosts, "Returns the list of all hosts found in the platform")
       .def("load_platform", &Engine::load_platform, "Load a platform file describing the environment")
       .def("load_deployment", &Engine::load_deployment, "Load a deployment file and launch the actors that it contains")
-      .def("run", &Engine::run, py::call_guard<GilScopedRelease>(), "Run the simulation")
+      .def("run", &Engine::run, py::call_guard<py::gil_scoped_release>(), "Run the simulation")
       .def(
           "register_actor",
           [](Engine* e, const std::string& name, py::object fun_or_class) {
             e->register_actor(name, [fun_or_class](std::vector<std::string> args) {
-              GilScopedAcquire py_context;
               try {
+                py::gil_scoped_acquire py_context;
                 /* Convert the std::vector into a py::tuple */
                 py::tuple params(args.size() - 1);
                 for (size_t i = 1; i < args.size(); i++)
@@ -209,9 +156,7 @@ PYBIND11_MODULE(simgrid, m)
                 if (py::isinstance<py::function>(res))
                   res();
               } catch (const py::error_already_set& ex) {
-                bool ffk = ex.matches(pyForcefulKillEx);
-                py_context.reset();
-                if (ffk) {
+                if (ex.matches(pyForcefulKillEx)) {
                   XBT_VERB("Actor killed");
                   simgrid::ForcefulKillException::do_throw(); // Forward that ForcefulKill exception
                 }
@@ -222,13 +167,18 @@ PYBIND11_MODULE(simgrid, m)
           "Registers the main function of an actor");
 
   /* Class Netzone */
-  py::class_<simgrid::s4u::NetZone, std::unique_ptr<simgrid::s4u::NetZone, py::nodelete>>(m, "NetZone",
-                                                                                          "Networking Zones")
-      .def_static("create_full_zone", &simgrid::s4u::create_full_zone, "Creates a zone of type FullZone")
+  py::class_<simgrid::s4u::NetZone, std::unique_ptr<simgrid::s4u::NetZone, py::nodelete>> netzone(m, "NetZone",
+                                                                                                  "Networking Zones");
+  netzone.def_static("create_full_zone", &simgrid::s4u::create_full_zone, "Creates a zone of type FullZone")
       .def_static("create_torus_zone", &simgrid::s4u::create_torus_zone, "Creates a cluster of type Torus")
       .def_static("create_fatTree_zone", &simgrid::s4u::create_fatTree_zone, "Creates a cluster of type Fat-Tree")
       .def_static("create_dragonfly_zone", &simgrid::s4u::create_dragonfly_zone, "Creates a cluster of type Dragonfly")
       .def_static("create_star_zone", &simgrid::s4u::create_star_zone, "Creates a zone of type Star")
+      .def_static("create_floyd_zone", &simgrid::s4u::create_floyd_zone, "Creates a zone of type Floyd")
+      .def_static("create_dijkstra_zone", &simgrid::s4u::create_floyd_zone, "Creates a zone of type Dijkstra")
+      .def_static("create_vivaldi_zone", &simgrid::s4u::create_vivaldi_zone, "Creates a zone of type Vivaldi")
+      .def_static("create_empty_zone", &simgrid::s4u::create_empty_zone, "Creates a zone of type Empty")
+      .def_static("create_wifi_zone", &simgrid::s4u::create_wifi_zone, "Creates a zone of type Wi-Fi")
       .def("add_route",
            py::overload_cast<simgrid::kernel::routing::NetPoint*, simgrid::kernel::routing::NetPoint*,
                              simgrid::kernel::routing::NetPoint*, simgrid::kernel::routing::NetPoint*,
@@ -239,18 +189,36 @@ PYBIND11_MODULE(simgrid, m)
       .def("create_host",
            py::overload_cast<const std::string&, const std::string&>(&simgrid::s4u::NetZone::create_host),
            "Creates a host")
+      .def("create_host",
+           py::overload_cast<const std::string&, const std::vector<double>&>(&simgrid::s4u::NetZone::create_host),
+           "Creates a host")
+      .def("create_host",
+           py::overload_cast<const std::string&, const std::vector<std::string>&>(&simgrid::s4u::NetZone::create_host),
+           "Creates a host")
+      .def("create_link", py::overload_cast<const std::string&, double>(&simgrid::s4u::NetZone::create_link),
+           "Creates a network link")
+      .def("create_link",
+           py::overload_cast<const std::string&, const std::string&>(&simgrid::s4u::NetZone::create_link),
+           "Creates a network link")
       .def("create_link",
            py::overload_cast<const std::string&, const std::vector<double>&>(&simgrid::s4u::NetZone::create_link),
            "Creates a network link")
+      .def("create_link",
+           py::overload_cast<const std::string&, const std::vector<std::string>&>(&simgrid::s4u::NetZone::create_link),
+           "Creates a network link")
       .def("create_split_duplex_link",
            py::overload_cast<const std::string&, double>(&simgrid::s4u::NetZone::create_split_duplex_link),
            "Creates a split-duplex link")
       .def("create_split_duplex_link",
            py::overload_cast<const std::string&, const std::string&>(&simgrid::s4u::NetZone::create_split_duplex_link),
            "Creates a split-duplex link")
+      .def("create_router", &simgrid::s4u::NetZone::create_router, "Create a router")
       .def("set_parent", &simgrid::s4u::NetZone::set_parent, "Set the parent of this zone")
+      .def("set_property", &simgrid::s4u::NetZone::set_property, "Add a property to this zone")
       .def("get_netpoint", &simgrid::s4u::NetZone::get_netpoint, "Retrieve the netpoint associated to this zone")
-      .def("seal", &simgrid::s4u::NetZone::seal, "Seal this NetZone");
+      .def("seal", &simgrid::s4u::NetZone::seal, "Seal this NetZone")
+      .def_property_readonly(
+          "name", [](const simgrid::s4u::NetZone* self) { return self->get_name(); }, "The name of this network zone");
 
   /* Class ClusterCallbacks */
   py::class_<simgrid::s4u::ClusterCallbacks>(m, "ClusterCallbacks", "Callbacks used to create cluster zones")
@@ -269,20 +237,32 @@ PYBIND11_MODULE(simgrid, m)
                     const std::pair<unsigned int, unsigned int>&, unsigned int>());
 
   /* Class Host */
-  py::class_<simgrid::s4u::Host, std::unique_ptr<Host, py::nodelete>>(m, "Host", "Simulated host")
-      .def("by_name", &Host::by_name, "Retrieves a host from its name, or die")
+  py::class_<simgrid::s4u::Host, std::unique_ptr<Host, py::nodelete>> host(m, "Host", "Simulated host");
+  host.def("by_name", &Host::by_name, "Retrieves a host from its name, or die")
       .def("get_pstate_count", &Host::get_pstate_count, "Retrieve the count of defined pstate levels")
       .def("get_pstate_speed", &Host::get_pstate_speed, "Retrieve the maximal speed at the given pstate")
       .def("get_netpoint", &Host::get_netpoint, "Retrieve the netpoint associated to this host")
-      .def("seal", &Host::seal, "Seal this host")
+      .def("get_disks", &Host::get_disks, "Retrieve the list of disks in this host")
+      .def("set_core_count", &Host::set_core_count, py::call_guard<py::gil_scoped_release>(),
+           "Set the number of cores in the CPU")
+      .def("set_coordinates", &Host::set_coordinates, py::call_guard<py::gil_scoped_release>(),
+           "Set the coordinates of this host")
+      .def("set_sharing_policy", &simgrid::s4u::Host::set_sharing_policy, py::call_guard<py::gil_scoped_release>(),
+           "Describe how the CPU is shared", py::arg("policy"), py::arg("cb") = simgrid::s4u::NonLinearResourceCb())
+      .def("create_disk", py::overload_cast<const std::string&, double, double>(&Host::create_disk),
+           py::call_guard<py::gil_scoped_release>(), "Create a disk")
+      .def("create_disk",
+           py::overload_cast<const std::string&, const std::string&, const std::string&>(&Host::create_disk),
+           py::call_guard<py::gil_scoped_release>(), "Create a disk")
+      .def("seal", &Host::seal, py::call_guard<py::gil_scoped_release>(), "Seal this host")
       .def_property(
           "pstate", &Host::get_pstate,
           [](Host* h, int i) {
-            GilScopedRelease gil_guard;
+            py::gil_scoped_release gil_guard;
             h->set_pstate(i);
           },
           "The current pstate")
-      .def("current", &Host::current, py::call_guard<GilScopedRelease>(),
+      .def("current", &Host::current, py::call_guard<py::gil_scoped_release>(),
            "Retrieves the host on which the running actor is located.")
       .def_property_readonly(
           "name",
@@ -297,23 +277,60 @@ PYBIND11_MODULE(simgrid, m)
           "speed", &Host::get_speed,
           "The peak computing speed in flops/s at the current pstate, taking the external load into account. "
           "This is the max potential speed.");
+  py::enum_<simgrid::s4u::Host::SharingPolicy>(host, "SharingPolicy")
+      .value("NONLINEAR", simgrid::s4u::Host::SharingPolicy::NONLINEAR)
+      .value("LINEAR", simgrid::s4u::Host::SharingPolicy::LINEAR)
+      .export_values();
+
+  /* Class Disk */
+  py::class_<simgrid::s4u::Disk, std::unique_ptr<simgrid::s4u::Disk, py::nodelete>> disk(m, "Disk", "Simulated disk");
+  disk.def("read", py::overload_cast<sg_size_t, double>(&simgrid::s4u::Disk::read, py::const_),
+           py::call_guard<py::gil_scoped_release>(), "Read data from disk", py::arg("size"), py::arg("priority") = 1)
+      .def("write", py::overload_cast<sg_size_t, double>(&simgrid::s4u::Disk::write, py::const_),
+           py::call_guard<py::gil_scoped_release>(), "Write data in disk", py::arg("size"), py::arg("priority") = 1)
+      .def("read_async", &simgrid::s4u::Disk::read_async, py::call_guard<py::gil_scoped_release>(),
+           "Non-blocking read data from disk")
+      .def("write_async", &simgrid::s4u::Disk::write_async, py::call_guard<py::gil_scoped_release>(),
+           "Non-blocking write data in disk")
+      .def("set_sharing_policy", &simgrid::s4u::Disk::set_sharing_policy, py::call_guard<py::gil_scoped_release>(),
+           "Set sharing policy for this disk", py::arg("op"), py::arg("policy"),
+           py::arg("cb") = simgrid::s4u::NonLinearResourceCb())
+      .def("seal", &simgrid::s4u::Disk::seal, py::call_guard<py::gil_scoped_release>(), "Seal this disk")
+      .def_property_readonly(
+          "name", [](const simgrid::s4u::Disk* self) { return self->get_name(); }, "The name of this disk");
+  py::enum_<simgrid::s4u::Disk::SharingPolicy>(disk, "SharingPolicy")
+      .value("NONLINEAR", simgrid::s4u::Disk::SharingPolicy::NONLINEAR)
+      .value("LINEAR", simgrid::s4u::Disk::SharingPolicy::LINEAR)
+      .export_values();
+  py::enum_<simgrid::s4u::Disk::Operation>(disk, "Operation")
+      .value("READ", simgrid::s4u::Disk::Operation::READ)
+      .value("WRITE", simgrid::s4u::Disk::Operation::WRITE)
+      .value("READWRITE", simgrid::s4u::Disk::Operation::READWRITE)
+      .export_values();
 
   /* Class NetPoint */
-  py::class_<simgrid::kernel::routing::NetPoint, std::unique_ptr<simgrid::kernel::routing::NetPoint, py::nodelete>>(
-      m, "NetPoint", "NetPoint object");
+  py::class_<simgrid::kernel::routing::NetPoint, std::unique_ptr<simgrid::kernel::routing::NetPoint, py::nodelete>>
+      netpoint(m, "NetPoint", "NetPoint object");
 
   /* Class Link */
   py::class_<simgrid::s4u::Link, std::unique_ptr<simgrid::s4u::Link, py::nodelete>> link(m, "Link", "Network link");
-  link.def("set_latency", py::overload_cast<const std::string&>(&simgrid::s4u::Link::set_latency), "Set the latency");
-  link.def("set_latency", py::overload_cast<double>(&simgrid::s4u::Link::set_latency), "Set the latency");
-  link.def("set_sharing_policy", &simgrid::s4u::Link::set_sharing_policy, "Set sharing policy for this link");
-  link.def("seal", &simgrid::s4u::Link::seal, "Seal this link");
-  link.def_property_readonly(
-      "name",
-      [](const simgrid::s4u::Link* self) {
-        return std::string(self->get_name().c_str()); // Convert from xbt::string because of MC
-      },
-      "The name of this link");
+  link.def("set_latency", py::overload_cast<const std::string&>(&simgrid::s4u::Link::set_latency),
+           py::call_guard<py::gil_scoped_release>(), "Set the latency")
+      .def("set_latency", py::overload_cast<double>(&simgrid::s4u::Link::set_latency),
+           py::call_guard<py::gil_scoped_release>(), "Set the latency")
+      .def("set_sharing_policy", &simgrid::s4u::Link::set_sharing_policy, py::call_guard<py::gil_scoped_release>(),
+           "Set sharing policy for this link")
+      .def("set_concurrency_limit", &simgrid::s4u::Link::set_concurrency_limit,
+           py::call_guard<py::gil_scoped_release>(), "Set concurrency limit for this link")
+      .def("set_host_wifi_rate", &simgrid::s4u::Link::set_host_wifi_rate, py::call_guard<py::gil_scoped_release>(),
+           "Set level of communication speed of given host on this Wi-Fi link")
+      .def("seal", &simgrid::s4u::Link::seal, py::call_guard<py::gil_scoped_release>(), "Seal this link")
+      .def_property_readonly(
+          "name",
+          [](const simgrid::s4u::Link* self) {
+            return std::string(self->get_name().c_str()); // Convert from xbt::string because of MC
+          },
+          "The name of this link");
   py::enum_<simgrid::s4u::Link::SharingPolicy>(link, "SharingPolicy")
       .value("NONLINEAR", simgrid::s4u::Link::SharingPolicy::NONLINEAR)
       .value("WIFI", simgrid::s4u::Link::SharingPolicy::WIFI)
@@ -344,7 +361,7 @@ PYBIND11_MODULE(simgrid, m)
       .def(
           "__str__", [](const Mailbox* self) { return std::string("Mailbox(") + self->get_cname() + ")"; },
           "Textual representation of the Mailbox`")
-      .def("by_name", &Mailbox::by_name, py::call_guard<GilScopedRelease>(), "Retrieve a Mailbox from its name")
+      .def("by_name", &Mailbox::by_name, py::call_guard<py::gil_scoped_release>(), "Retrieve a Mailbox from its name")
       .def_property_readonly(
           "name",
           [](const Mailbox* self) {
@@ -357,14 +374,14 @@ PYBIND11_MODULE(simgrid, m)
             data.inc_ref();
             self->put(data.ptr(), size);
           },
-          py::call_guard<GilScopedRelease>(), "Blocking data transmission")
+          py::call_guard<py::gil_scoped_release>(), "Blocking data transmission")
       .def(
           "put_async",
           [](Mailbox* self, py::object data, int size) {
             data.inc_ref();
             return self->put_async(data.ptr(), size);
           },
-          py::call_guard<GilScopedRelease>(), "Non-blocking data transmission")
+          py::call_guard<py::gil_scoped_release>(), "Non-blocking data transmission")
       .def(
           "get",
           [](Mailbox* self) {
@@ -372,7 +389,7 @@ PYBIND11_MODULE(simgrid, m)
             // data.dec_ref(); // FIXME: why does it break python-actor-create?
             return data;
           },
-          py::call_guard<GilScopedRelease>(), "Blocking data reception")
+          py::call_guard<py::gil_scoped_release>(), "Blocking data reception")
       .def(
           "get_async",
           [](Mailbox* self) -> std::tuple<simgrid::s4u::CommPtr, PyGetAsync> {
@@ -380,58 +397,70 @@ PYBIND11_MODULE(simgrid, m)
             auto comm = self->get_async(wrap.get());
             return std::make_tuple(std::move(comm), std::move(wrap));
           },
-          py::call_guard<GilScopedRelease>(),
+          py::call_guard<py::gil_scoped_release>(),
           "Non-blocking data reception. Use data.get() to get the python object after the communication has finished")
       .def(
           "set_receiver", [](Mailbox* self, ActorPtr actor) { self->set_receiver(actor); },
-          py::call_guard<GilScopedRelease>(), "Sets the actor as permanent receiver");
+          py::call_guard<py::gil_scoped_release>(), "Sets the actor as permanent receiver");
 
   /* Class PyGetAsync */
   py::class_<PyGetAsync>(m, "PyGetAsync", "Wrapper for async get communications")
       .def(py::init<>())
       .def(
-          "get", [](PyGetAsync* self) { return py::reinterpret_steal<py::object>(*(self->get())); },
+          "get", [](const PyGetAsync* self) { return py::reinterpret_steal<py::object>(*(self->get())); },
           "Get python object after async communication in receiver side");
 
   /* Class Comm */
   py::class_<simgrid::s4u::Comm, simgrid::s4u::CommPtr>(m, "Comm", "Communication")
-      .def("test", &simgrid::s4u::Comm::test, py::call_guard<GilScopedRelease>(),
+      .def("test", &simgrid::s4u::Comm::test, py::call_guard<py::gil_scoped_release>(),
            "Test whether the communication is terminated.")
-      .def("wait", &simgrid::s4u::Comm::wait, py::call_guard<GilScopedRelease>(),
+      .def("wait", &simgrid::s4u::Comm::wait, py::call_guard<py::gil_scoped_release>(),
            "Block until the completion of that communication.")
       // use py::overload_cast for wait_all/wait_any, until the overload marked XBT_ATTRIB_DEPRECATED_v332 is removed
-      .def_static("wait_all",
-                  py::overload_cast<const std::vector<simgrid::s4u::CommPtr>&>(&simgrid::s4u::Comm::wait_all),
-                  py::call_guard<GilScopedRelease>(), "Block until the completion of all communications in the list.")
+      .def_static(
+          "wait_all", py::overload_cast<const std::vector<simgrid::s4u::CommPtr>&>(&simgrid::s4u::Comm::wait_all),
+          py::call_guard<py::gil_scoped_release>(), "Block until the completion of all communications in the list.")
       .def_static(
           "wait_any", py::overload_cast<const std::vector<simgrid::s4u::CommPtr>&>(&simgrid::s4u::Comm::wait_any),
-          py::call_guard<GilScopedRelease>(),
+          py::call_guard<py::gil_scoped_release>(),
           "Block until the completion of any communication in the list and return the index of the terminated one.");
 
+  /* Class Io */
+  py::class_<simgrid::s4u::Io, simgrid::s4u::IoPtr>(m, "Io", "I/O activities")
+      .def("test", &simgrid::s4u::Io::test, py::call_guard<py::gil_scoped_release>(),
+           "Test whether the I/O is terminated.")
+      .def("wait", &simgrid::s4u::Io::wait, py::call_guard<py::gil_scoped_release>(),
+           "Block until the completion of that I/O operation")
+      .def_static(
+          "wait_any_for", &simgrid::s4u::Io::wait_any_for, py::call_guard<py::gil_scoped_release>(),
+          "Block until the completion of any I/O in the list (or timeout) and return the index of the terminated one.")
+      .def_static("wait_any", &simgrid::s4u::Io::wait_any, py::call_guard<py::gil_scoped_release>(),
+                  "Block until the completion of any I/O in the list and return the index of the terminated one.");
+
   /* Class Exec */
   py::class_<simgrid::s4u::Exec, simgrid::s4u::ExecPtr>(m, "Exec", "Execution")
       .def_property_readonly(
           "remaining",
           [](simgrid::s4u::ExecPtr self) {
-            GilScopedRelease gil_guard;
+            py::gil_scoped_release gil_guard;
             return self->get_remaining();
           },
           "Amount of flops that remain to be computed until completion.")
       .def_property_readonly(
           "remaining_ratio",
           [](simgrid::s4u::ExecPtr self) {
-            GilScopedRelease gil_guard;
+            py::gil_scoped_release gil_guard;
             return self->get_remaining_ratio();
           },
           "Amount of work remaining until completion from 0 (completely done) to 1 (nothing done "
           "yet).")
       .def_property("host", &simgrid::s4u::Exec::get_host, &simgrid::s4u::Exec::set_host,
                     "Host on which this execution runs. Only the first host is returned for parallel executions.")
-      .def("test", &simgrid::s4u::Exec::test, py::call_guard<GilScopedRelease>(),
+      .def("test", &simgrid::s4u::Exec::test, py::call_guard<py::gil_scoped_release>(),
            "Test whether the execution is terminated.")
-      .def("cancel", &simgrid::s4u::Exec::cancel, py::call_guard<GilScopedRelease>(), "Cancel that execution.")
-      .def("start", &simgrid::s4u::Exec::start, py::call_guard<GilScopedRelease>(), "Start that execution.")
-      .def("wait", &simgrid::s4u::Exec::wait, py::call_guard<GilScopedRelease>(),
+      .def("cancel", &simgrid::s4u::Exec::cancel, py::call_guard<py::gil_scoped_release>(), "Cancel that execution.")
+      .def("start", &simgrid::s4u::Exec::start, py::call_guard<py::gil_scoped_release>(), "Start that execution.")
+      .def("wait", &simgrid::s4u::Exec::wait, py::call_guard<py::gil_scoped_release>(),
            "Block until the completion of that execution.");
 
   /* Class Actor */
@@ -440,17 +469,15 @@ PYBIND11_MODULE(simgrid, m)
                                             "application")
       .def(
           "create",
-          [](py::str name, Host* host, py::object fun, py::args args) {
+          [](py::str name, Host* h, py::object fun, py::args args) {
             fun.inc_ref();  // FIXME: why is this needed for tests like exec-async, exec-dvfs and exec-remote?
             args.inc_ref(); // FIXME: why is this needed for tests like actor-migrate?
-            return simgrid::s4u::Actor::create(name, host, [fun, args]() {
-              GilScopedAcquire py_context;
+            return simgrid::s4u::Actor::create(name, h, [fun, args]() {
               try {
+                py::gil_scoped_acquire py_context;
                 fun(*args);
               } catch (const py::error_already_set& ex) {
-                bool ffk = ex.matches(pyForcefulKillEx);
-                py_context.reset();
-                if (ffk) {
+                if (ex.matches(pyForcefulKillEx)) {
                   XBT_VERB("Actor killed");
                   simgrid::ForcefulKillException::do_throw(); // Forward that ForcefulKill exception
                 }
@@ -458,11 +485,11 @@ PYBIND11_MODULE(simgrid, m)
               }
             });
           },
-          py::call_guard<GilScopedRelease>(), "Create an actor from a function or an object.")
+          py::call_guard<py::gil_scoped_release>(), "Create an actor from a function or an object.")
       .def_property(
           "host", &Actor::get_host,
           [](Actor* a, Host* h) {
-            GilScopedRelease gil_guard;
+            py::gil_scoped_release gil_guard;
             a->set_host(h);
           },
           "The host on which this actor is located")
@@ -471,20 +498,20 @@ PYBIND11_MODULE(simgrid, m)
       .def_property_readonly("ppid", &Actor::get_ppid,
                              "The PID (unique identifier) of the actor that created this one.")
       .def("by_pid", &Actor::by_pid, "Retrieve an actor by its PID")
-      .def("daemonize", &Actor::daemonize, py::call_guard<GilScopedRelease>(),
+      .def("daemonize", &Actor::daemonize, py::call_guard<py::gil_scoped_release>(),
            "This actor will be automatically terminated when the last non-daemon actor finishes (more info in the C++ "
            "documentation).")
       .def("is_daemon", &Actor::is_daemon,
            "Returns True if that actor is a daemon and will be terminated automatically when the last non-daemon actor "
            "terminates.")
-      .def("join", py::overload_cast<double>(&Actor::join, py::const_), py::call_guard<GilScopedRelease>(),
+      .def("join", py::overload_cast<double>(&Actor::join, py::const_), py::call_guard<py::gil_scoped_release>(),
            "Wait for the actor to finish (more info in the C++ documentation).", py::arg("timeout"))
-      .def("kill", &Actor::kill, py::call_guard<GilScopedRelease>(), "Kill that actor")
-      .def("kill_all", &Actor::kill_all, py::call_guard<GilScopedRelease>(), "Kill all actors but the caller.")
+      .def("kill", &Actor::kill, py::call_guard<py::gil_scoped_release>(), "Kill that actor")
+      .def("kill_all", &Actor::kill_all, py::call_guard<py::gil_scoped_release>(), "Kill all actors but the caller.")
       .def("self", &Actor::self, "Retrieves the current actor.")
       .def("is_suspended", &Actor::is_suspended, "Returns True if that actor is currently suspended.")
-      .def("suspend", &Actor::suspend, py::call_guard<GilScopedRelease>(),
+      .def("suspend", &Actor::suspend, py::call_guard<py::gil_scoped_release>(),
            "Suspend that actor, that is blocked until resume()ed by another actor.")
-      .def("resume", &Actor::resume, py::call_guard<GilScopedRelease>(),
+      .def("resume", &Actor::resume, py::call_guard<py::gil_scoped_release>(),
            "Resume that actor, that was previously suspend()ed.");
 }