1 /* Copyright (c) 2018-2020. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #warning Try to work around https://bugs.python.org/issue11566
12 #pragma GCC diagnostic push
13 #pragma GCC diagnostic ignored "-Wunused-value"
16 #include <pybind11/functional.h>
17 #include <pybind11/pybind11.h> // Must come before our own stuff
18 #include <pybind11/stl.h>
21 #pragma GCC diagnostic pop
24 #include "src/kernel/context/Context.hpp"
25 #include <simgrid/Exception.hpp>
26 #include <simgrid/s4u/Actor.hpp>
27 #include <simgrid/s4u/Comm.hpp>
28 #include <simgrid/s4u/Engine.hpp>
29 #include <simgrid/s4u/Exec.hpp>
30 #include <simgrid/s4u/Host.hpp>
31 #include <simgrid/s4u/Mailbox.hpp>
32 #include <simgrid/version.h>
38 namespace py = pybind11;
39 using simgrid::s4u::Actor;
40 using simgrid::s4u::ActorPtr;
41 using simgrid::s4u::Engine;
42 using simgrid::s4u::Host;
43 using simgrid::s4u::Mailbox;
45 XBT_LOG_NEW_DEFAULT_CATEGORY(python, "python");
49 static std::string get_simgrid_version()
54 sg_version_get(&major, &minor, &patch);
55 return simgrid::xbt::string_printf("%i.%i.%i", major, minor, patch);
58 /* Classes GilScopedAcquire and GilScopedRelease have the same purpose as pybind11::gil_scoped_acquire and
59 * pybind11::gil_scoped_release. Refer to the manual of pybind11 for details:
60 * https://pybind11.readthedocs.io/en/stable/advanced/misc.html#global-interpreter-lock-gil
62 * The pybind11 versions are however too sophisticated (using TLS for example) and don't work well with all kinds of
64 * See also https://github.com/pybind/pybind11/issues/1276, which may be related.
66 * Briefly, GilScopedAcquire can be used on actor creation to acquire a new PyThreadState. The PyThreadState has to be
67 * released for context switches (i.e. before simcalls). That's the purpose of GilScopedRelease.
69 * Like their pybind11 counterparts, both classes use a RAII pattern.
71 class XBT_PRIVATE GilScopedAcquire {
72 static PyThreadState* acquire()
74 PyThreadState* state = PyThreadState_New(PyInterpreterState_Head());
75 PyEval_AcquireThread(state);
78 static void release(PyThreadState* state)
80 PyEval_ReleaseThread(state);
81 PyThreadState_Clear(state);
82 PyThreadState_Delete(state);
85 std::unique_ptr<PyThreadState, decltype(&release)> thread_state{acquire(), &release};
88 void reset() { thread_state.reset(); }
91 class XBT_PRIVATE GilScopedRelease {
92 std::unique_ptr<PyThreadState, decltype(&PyEval_RestoreThread)> thread_state{PyEval_SaveThread(),
93 &PyEval_RestoreThread};
98 PYBIND11_DECLARE_HOLDER_TYPE(T, boost::intrusive_ptr<T>)
100 PYBIND11_MODULE(simgrid, m)
102 m.doc() = "SimGrid userspace API";
104 m.attr("simgrid_version") = get_simgrid_version();
106 // Internal exception used to kill actors and sweep the RAII chimney (free objects living on the stack)
107 static py::object pyForcefulKillEx(py::register_exception<simgrid::ForcefulKillException>(m, "ActorKilled"));
109 /* this_actor namespace */
110 m.def_submodule("this_actor", "Bindings of the s4u::this_actor namespace.")
112 "info", [](const char* s) { XBT_INFO("%s", s); }, "Display a logging message of 'info' priority.")
114 "error", [](const char* s) { XBT_ERROR("%s", s); }, "Display a logging message of 'error' priority.")
115 .def("execute", py::overload_cast<double, double>(&simgrid::s4u::this_actor::execute),
116 py::call_guard<GilScopedRelease>(),
117 "Block the current actor, computing the given amount of flops at the given priority.", py::arg("flops"),
118 py::arg("priority") = 1)
119 .def("exec_init", py::overload_cast<double>(&simgrid::s4u::this_actor::exec_init),
120 py::call_guard<GilScopedRelease>())
121 .def("get_host", &simgrid::s4u::this_actor::get_host, "Retrieves host on which the current actor is located")
122 .def("set_host", &simgrid::s4u::this_actor::set_host, py::call_guard<GilScopedRelease>(),
123 "Moves the current actor to another host.", py::arg("dest"))
124 .def("sleep_for", static_cast<void (*)(double)>(&simgrid::s4u::this_actor::sleep_for),
125 py::call_guard<GilScopedRelease>(), "Block the actor sleeping for that amount of seconds.",
127 .def("sleep_until", static_cast<void (*)(double)>(&simgrid::s4u::this_actor::sleep_until),
128 py::call_guard<GilScopedRelease>(), "Block the actor sleeping until the specified timestamp.",
130 .def("suspend", &simgrid::s4u::this_actor::suspend, py::call_guard<GilScopedRelease>(),
131 "Suspend the current actor, that is blocked until resume()ed by another actor.")
132 .def("yield_", &simgrid::s4u::this_actor::yield, py::call_guard<GilScopedRelease>(), "Yield the actor")
133 .def("exit", &simgrid::s4u::this_actor::exit, py::call_guard<GilScopedRelease>(), "kill the current actor")
137 simgrid::s4u::this_actor::on_exit([fun](bool /*failed*/) {
138 GilScopedAcquire py_context; // need a new context for callback
141 } catch (const py::error_already_set& e) {
142 std::string what = e.what();
144 xbt_die("Error while executing the on_exit lambda: %s", what.c_str());
148 py::call_guard<GilScopedRelease>(), "");
151 py::class_<Engine>(m, "Engine", "Simulation Engine")
152 .def(py::init([](std::vector<std::string> args) {
153 static char noarg[] = {'\0'};
154 int argc = args.size();
155 std::unique_ptr<char* []> argv(new char*[argc + 1]);
156 for (int i = 0; i != argc; ++i)
157 argv[i] = args[i].empty() ? noarg : &args[i].front();
158 argv[argc] = nullptr;
159 // Currently this can be dangling, we should wrap this somehow.
160 return new simgrid::s4u::Engine(&argc, argv.get());
162 .def_static("get_clock", &Engine::get_clock,
163 "The simulation time, ie the amount of simulated seconds since the simulation start.")
164 .def("get_all_hosts", &Engine::get_all_hosts, "Returns the list of all hosts found in the platform")
165 .def("load_platform", &Engine::load_platform, "Load a platform file describing the environment")
166 .def("load_deployment", &Engine::load_deployment, "Load a deployment file and launch the actors that it contains")
167 .def("run", &Engine::run, py::call_guard<GilScopedRelease>(), "Run the simulation")
170 [](Engine* e, const std::string& name, py::object fun_or_class) {
171 e->register_actor(name, [fun_or_class](std::vector<std::string> args) {
172 GilScopedAcquire py_context;
174 /* Convert the std::vector into a py::tuple */
175 py::tuple params(args.size() - 1);
176 for (size_t i = 1; i < args.size(); i++)
177 params[i - 1] = py::cast(args[i]);
179 py::object res = fun_or_class(*params);
181 /* If I was passed a class, I just built an instance, so I need to call it now */
182 if (py::isinstance<py::function>(res))
184 } catch (const py::error_already_set& ex) {
185 bool ffk = ex.matches(pyForcefulKillEx);
188 XBT_VERB("Actor killed");
189 /* Forward that ForcefulKill exception */
190 simgrid::ForcefulKillException::do_throw();
196 "Registers the main function of an actor");
199 py::class_<simgrid::s4u::Host, std::unique_ptr<Host, py::nodelete>>(m, "Host", "Simulated host")
200 .def("by_name", &Host::by_name, "Retrieves a host from its name, or die")
201 .def("get_pstate_count", &Host::get_pstate_count, "Retrieve the cound of defined pstate levels")
202 .def("get_pstate_speed", &Host::get_pstate_speed, "Retrieve the maximal speed at the given pstate")
204 "pstate", &Host::get_pstate,
206 GilScopedRelease gil_guard;
209 "The current pstate")
210 .def("current", &Host::current, py::call_guard<GilScopedRelease>(),
211 "Retrieves the host on which the running actor is located.")
212 .def_property_readonly(
214 [](const Host* self) {
215 return std::string(self->get_name().c_str()); // Convert from xbt::string because of MC
217 "The name of this host")
218 .def_property_readonly(
219 "load", &Host::get_load,
220 "Returns the current computation load (in flops per second). This is the currently achieved speed.")
221 .def_property_readonly(
222 "speed", &Host::get_speed,
223 "The peak computing speed in flops/s at the current pstate, taking the external load into account. "
224 "This is the max potential speed.");
227 py::class_<simgrid::s4u::Mailbox, std::unique_ptr<Mailbox, py::nodelete>>(m, "Mailbox", "Mailbox")
229 "__str__", [](const Mailbox* self) { return std::string("Mailbox(") + self->get_cname() + ")"; },
230 "Textual representation of the Mailbox`")
231 .def("by_name", &Mailbox::by_name, py::call_guard<GilScopedRelease>(), "Retrieve a Mailbox from its name")
232 .def_property_readonly(
234 [](const Mailbox* self) {
235 return std::string(self->get_name().c_str()); // Convert from xbt::string because of MC
237 "The name of that mailbox")
240 [](Mailbox* self, py::object data, int size) {
242 self->put(data.ptr(), size);
244 py::call_guard<GilScopedRelease>(), "Blocking data transmission")
247 [](Mailbox* self, py::object data, int size) {
249 return self->put_async(data.ptr(), size);
251 py::call_guard<GilScopedRelease>(), "Non-blocking data transmission")
255 py::object data = pybind11::reinterpret_steal<py::object>(static_cast<PyObject*>(self->get()));
256 // data.dec_ref(); // FIXME: why does it break python-actor-create?
259 py::call_guard<GilScopedRelease>(), "Blocking data reception");
262 py::class_<simgrid::s4u::Comm, simgrid::s4u::CommPtr>(m, "Comm", "Communication")
263 .def("test", &simgrid::s4u::Comm::test, py::call_guard<GilScopedRelease>(),
264 "Test whether the communication is terminated.")
265 .def("wait", &simgrid::s4u::Comm::wait, py::call_guard<GilScopedRelease>(),
266 "Block until the completion of that communication.")
267 .def("wait_all", &simgrid::s4u::Comm::wait_all, py::call_guard<GilScopedRelease>(),
268 "Block until the completion of all communications in the list.")
269 .def("wait_any", &simgrid::s4u::Comm::wait_any, py::call_guard<GilScopedRelease>(),
270 "Block until the completion of any communication in the list and return the index of the terminated one.");
273 py::class_<simgrid::s4u::Exec, simgrid::s4u::ExecPtr>(m, "Exec", "Execution")
274 .def_property_readonly(
276 [](simgrid::s4u::ExecPtr self) {
277 GilScopedRelease gil_guard;
278 return self->get_remaining();
280 "Amount of flops that remain to be computed until completion.")
281 .def_property_readonly(
283 [](simgrid::s4u::ExecPtr self) {
284 GilScopedRelease gil_guard;
285 return self->get_remaining_ratio();
287 "Amount of work remaining until completion from 0 (completely done) to 1 (nothing done "
289 .def_property("host", &simgrid::s4u::Exec::get_host, &simgrid::s4u::Exec::set_host,
290 "Host on which this execution runs. Only the first host is returned for parallel executions.")
291 .def("test", &simgrid::s4u::Exec::test, py::call_guard<GilScopedRelease>(),
292 "Test whether the execution is terminated.")
293 .def("cancel", &simgrid::s4u::Exec::cancel, py::call_guard<GilScopedRelease>(), "Cancel that execution.")
294 .def("start", &simgrid::s4u::Exec::start, py::call_guard<GilScopedRelease>(), "Start that execution.")
295 .def("wait", &simgrid::s4u::Exec::wait, py::call_guard<GilScopedRelease>(),
296 "Block until the completion of that execution.");
299 py::class_<simgrid::s4u::Actor, ActorPtr>(m, "Actor",
300 "An actor is an independent stream of execution in your distributed "
304 [](py::str name, Host* host, py::object fun, py::args args) {
305 fun.inc_ref(); // FIXME: why is this needed for tests like exec-async, exec-dvfs and exec-remote?
306 args.inc_ref(); // FIXME: why is this needed for tests like actor-migrate?
307 return simgrid::s4u::Actor::create(name, host, [fun, args]() {
308 GilScopedAcquire py_context;
311 } catch (const py::error_already_set& ex) {
312 bool ffk = ex.matches(pyForcefulKillEx);
315 XBT_VERB("Actor killed");
316 /* Forward that ForcefulKill exception */
317 simgrid::ForcefulKillException::do_throw();
323 py::call_guard<GilScopedRelease>(), "Create an actor from a function or an object.")
325 "host", &Actor::get_host,
326 [](Actor* a, Host* h) {
327 GilScopedRelease gil_guard;
330 "The host on which this actor is located")
331 .def_property_readonly("name", &Actor::get_cname, "The name of this actor.")
332 .def_property_readonly("pid", &Actor::get_pid, "The PID (unique identifier) of this actor.")
333 .def_property_readonly("ppid", &Actor::get_ppid,
334 "The PID (unique identifier) of the actor that created this one.")
335 .def("by_pid", &Actor::by_pid, "Retrieve an actor by its PID")
336 .def("daemonize", &Actor::daemonize, py::call_guard<GilScopedRelease>(),
337 "This actor will be automatically terminated when the last non-daemon actor finishes (more info in the C++ "
339 .def("is_daemon", &Actor::is_daemon,
340 "Returns True if that actor is a daemon and will be terminated automatically when the last non-daemon actor "
342 .def("join", py::overload_cast<double>(&Actor::join), py::call_guard<GilScopedRelease>(),
343 "Wait for the actor to finish (more info in the C++ documentation).", py::arg("timeout"))
344 .def("kill", &Actor::kill, py::call_guard<GilScopedRelease>(), "Kill that actor")
345 .def("kill_all", &Actor::kill_all, py::call_guard<GilScopedRelease>(), "Kill all actors but the caller.")
346 .def("self", &Actor::self, "Retrieves the current actor.")
347 .def("is_suspended", &Actor::is_suspended, "Returns True if that actor is currently suspended.")
348 .def("suspend", &Actor::suspend, py::call_guard<GilScopedRelease>(),
349 "Suspend that actor, that is blocked until resume()ed by another actor.")
350 .def("resume", &Actor::resume, py::call_guard<GilScopedRelease>(),
351 "Resume that actor, that was previously suspend()ed.");