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author | Alex AUVOLAT <alex.auvolat@ens.fr> | 2014-03-21 13:57:16 +0100 |
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committer | Alex AUVOLAT <alex.auvolat@ens.fr> | 2014-03-21 13:57:16 +0100 |
commit | c6313368d3719e507eba4216a4fc4ea9f30db576 (patch) | |
tree | bdbd39f4483e1433f6470f08e081c6b6b0fa53b0 | |
parent | 9b9bc4e787d6ecebcf15182a562fc47d27d9880d (diff) | |
download | SystemeReseaux-Projet-c6313368d3719e507eba4216a4fc4ea9f30db576.tar.gz SystemeReseaux-Projet-c6313368d3719e507eba4216a4fc4ea9f30db576.zip |
Retab files ; start work on networked implementation.
-rw-r--r-- | src/kahn.ml | 364 | ||||
-rw-r--r-- | src/kahnsock.ml | 142 | ||||
-rw-r--r-- | src/primes.ml | 4 |
3 files changed, 296 insertions, 214 deletions
diff --git a/src/kahn.ml b/src/kahn.ml index 5229f7e..a02ee24 100644 --- a/src/kahn.ml +++ b/src/kahn.ml @@ -1,199 +1,211 @@ module type S = sig - type 'a process - type 'a in_port - type 'a out_port + type 'a process + type 'a in_port + type 'a out_port - val new_channel: unit -> 'a in_port * 'a out_port - val put: 'a -> 'a out_port -> unit process - val get: 'a in_port -> 'a process + val io_read: unit -> string + val io_write: string -> unit - val doco: unit process list -> unit process + val new_channel: unit -> 'a in_port * 'a out_port + val put: 'a -> 'a out_port -> unit process + val get: 'a in_port -> 'a process - val return: 'a -> 'a process - val bind: 'a process -> ('a -> 'b process) -> 'b process + val doco: unit process list -> unit process - val run: 'a process -> 'a + val return: 'a -> 'a process + val bind: 'a process -> ('a -> 'b process) -> 'b process + + val run: 'a process -> 'a end module Lib (K : S) = struct - let ( >>= ) x f = K.bind x f - - let delay f x = - K.bind (K.return ()) (fun () -> K.return (f x)) - - let par_map f l = - let rec build_workers l (ports, workers) = - match l with - | [] -> (ports, workers) - | x :: l -> - let qi, qo = K.new_channel () in - build_workers - l - (qi :: ports, - ((delay f x) >>= (fun v -> K.put v qo)) :: workers) - in - let ports, workers = build_workers l ([], []) in - let rec collect l acc qo = - match l with - | [] -> K.put acc qo - | qi :: l -> (K.get qi) >>= (fun v -> collect l (v :: acc) qo) - in - let qi, qo = K.new_channel () in - K.run - ((K.doco ((collect ports [] qo) :: workers)) >>= (fun _ -> K.get qi)) + let ( >>= ) x f = K.bind x f + + let delay f x = + K.bind (K.return ()) (fun () -> K.return (f x)) + + let par_map f l = + let rec build_workers l (ports, workers) = + match l with + | [] -> (ports, workers) + | x :: l -> + let qi, qo = K.new_channel () in + build_workers + l + (qi :: ports, + ((delay f x) >>= (fun v -> K.put v qo)) :: workers) + in + let ports, workers = build_workers l ([], []) in + let rec collect l acc qo = + match l with + | [] -> K.put acc qo + | qi :: l -> (K.get qi) >>= (fun v -> collect l (v :: acc) qo) + in + let qi, qo = K.new_channel () in + K.run + ((K.doco ((collect ports [] qo) :: workers)) >>= (fun _ -> K.get qi)) end module Th: S = struct - type 'a process = (unit -> 'a) - - type 'a channel = { q: 'a Queue.t ; m: Mutex.t; } - type 'a in_port = 'a channel - type 'a out_port = 'a channel - - let new_channel () = - let q = { q = Queue.create (); m = Mutex.create (); } in - q, q - - let put v c () = - Mutex.lock c.m; - Queue.push v c.q; - Mutex.unlock c.m; - Thread.yield () - - let rec get c () = - try - Mutex.lock c.m; - let v = Queue.pop c.q in - Mutex.unlock c.m; - v - with Queue.Empty -> - Mutex.unlock c.m; - Thread.yield (); - get c () - - let doco l () = - let ths = List.map (fun f -> Thread.create f ()) l in - List.iter (fun th -> Thread.join th) ths - - let return v = (fun () -> v) - - let bind e e' () = - let v = e () in - Thread.yield (); - e' v () - - let run e = e () + type 'a process = (unit -> 'a) + + type 'a channel = { q: 'a Queue.t ; m: Mutex.t; } + type 'a in_port = 'a channel + type 'a out_port = 'a channel + + let new_channel () = + let q = { q = Queue.create (); m = Mutex.create (); } in + q, q + + let io_read () = "" + let io_write s = print_string s; flush stdout + + let put v c () = + Mutex.lock c.m; + Queue.push v c.q; + Mutex.unlock c.m; + Thread.yield () + + let rec get c () = + try + Mutex.lock c.m; + let v = Queue.pop c.q in + Mutex.unlock c.m; + v + with Queue.Empty -> + Mutex.unlock c.m; + Thread.yield (); + get c () + + let doco l () = + let ths = List.map (fun f -> Thread.create f ()) l in + List.iter (fun th -> Thread.join th) ths + + let return v = (fun () -> v) + + let bind e e' () = + let v = e () in + Thread.yield (); + e' v () + + let run e = e () end module Seq: S = struct - type 'a process = (('a -> unit) option) -> unit - - type 'a channel = 'a Queue.t - type 'a in_port = 'a channel - type 'a out_port = 'a channel - - type task = unit -> unit - - let tasks = Queue.create () - - let new_channel () = - let q = Queue.create () in - q, q - - let put x c = - fun cont -> - Queue.push x c; - match cont with - | None -> () - | Some cont -> Queue.push cont tasks - - let rec get c = - fun cont -> - try - let v = Queue.pop c in - match cont with - | None -> () - | Some cont -> Queue.push (fun () -> cont v) tasks - with Queue.Empty -> - Queue.push (fun () -> get c cont) tasks - - let doco l = - fun cont -> - List.iter (fun proc -> Queue.push (fun () -> proc None) tasks) l; - match cont with - | None -> () - | Some cont -> Queue.push cont tasks - - let return v = - fun cont -> - match cont with - | None -> () - | Some cont -> Queue.push (fun () -> cont v) tasks - - let bind e f = - fun cont -> - Queue.push (fun () -> e (Some (fun r -> f r cont))) tasks - - let run e = - let ret = ref None in - e (Some (fun v -> ret := Some v)); - while not (Queue.is_empty tasks) do - let task = Queue.pop tasks in - task () - done; - match !ret with - | Some k -> k - | None -> assert false + type 'a process = (('a -> unit) option) -> unit + + type 'a channel = 'a Queue.t + type 'a in_port = 'a channel + type 'a out_port = 'a channel + + type task = unit -> unit + + let tasks = Queue.create () + + let io_read () = "" + let io_write s = print_string s; flush stdout + + let new_channel () = + let q = Queue.create () in + q, q + + let put x c = + fun cont -> + Queue.push x c; + match cont with + | None -> () + | Some cont -> Queue.push cont tasks + + let rec get c = + fun cont -> + try + let v = Queue.pop c in + match cont with + | None -> () + | Some cont -> Queue.push (fun () -> cont v) tasks + with Queue.Empty -> + Queue.push (fun () -> get c cont) tasks + + let doco l = + fun cont -> + List.iter (fun proc -> Queue.push (fun () -> proc None) tasks) l; + match cont with + | None -> () + | Some cont -> Queue.push cont tasks + + let return v = + fun cont -> + match cont with + | None -> () + | Some cont -> Queue.push (fun () -> cont v) tasks + + let bind e f = + fun cont -> + Queue.push (fun () -> e (Some (fun r -> f r cont))) tasks + + let run e = + let ret = ref None in + e (Some (fun v -> ret := Some v)); + while not (Queue.is_empty tasks) do + let task = Queue.pop tasks in + task () + done; + match !ret with + | Some k -> k + | None -> assert false end module Pipe: S = struct - type 'a process = unit -> 'a - - type 'a in_port = in_channel - type 'a out_port = out_channel - - let children = ref [] - - let new_channel = - fun () -> - let i, o = Unix.pipe () in - Unix.in_channel_of_descr i, Unix.out_channel_of_descr o - - let get c = - fun () -> Marshal.from_channel c - - let put x c = - fun () -> Marshal.to_channel c x [] - - - let return v = - fun () -> v - - let bind e f = - fun () -> f (e ()) () - - let run p = - let v = p() in - List.iter - (fun x -> try ignore(Unix.waitpid [] x) with _ -> ()) - !children; - v - - let doco l = - fun () -> - List.iter (fun p -> - let i = Unix.fork () in - if i = 0 then begin - children := []; - run p; - exit 0 - end else begin - children := i::!children - end) - l + type 'a process = unit -> 'a + + type 'a in_port = in_channel + type 'a out_port = out_channel + + let children = ref [] + + let io_read () = "" + let io_write s = print_string s; flush stdout + + let new_channel = + fun () -> + let i, o = Unix.pipe () in + Unix.in_channel_of_descr i, Unix.out_channel_of_descr o + + let get c = + fun () -> Marshal.from_channel c + + let put x c = + fun () -> Marshal.to_channel c x [] + + + let return v = + fun () -> v + + let bind e f = + fun () -> f (e ()) () + + let run p = + let v = p() in + List.iter + (fun x -> try ignore(Unix.waitpid [] x) with _ -> ()) + !children; + v + + let doco l = + fun () -> + List.iter (fun p -> + let i = Unix.fork () in + if i = 0 then begin + children := []; + run p; + exit 0 + end else begin + children := i::!children + end) + l end diff --git a/src/kahnsock.ml b/src/kahnsock.ml index 6cdfadd..89ee65c 100644 --- a/src/kahnsock.ml +++ b/src/kahnsock.ml @@ -2,44 +2,114 @@ Random.self_init () type ident = (int * int * int * int) let gen_ident () = - Random.int 1000000000, Random.int 1000000000, - Random.int 1000000000, Random.int 1000000000 + Random.int 1000000000, Random.int 1000000000, + Random.int 1000000000, Random.int 1000000000 module Sock : Kahn.S = struct - (* L'idée : - - L'ensemble des noeuds qui font du calcul est un arbre. - Le premier noeud lancé est la racine de l'arbre ; tous les - noeuds qui se connectent par la suite se connectent à un - noeud déjà présent et sont donc son fils. - - Les processus sont des fermetures de type unit -> unit, - transmises par des canaux - - Un noeud de calcul est un processus ocaml avec un seul - thread. Le parallélisme est coopératif (penser à faire - des binds assez souvent). - - Les noeuds publient régulièrement leur load, ie le nombre - de processus en attente et qui ne sont pas en train - d'attendre des données depuis un canal. Si un noeud a un - voisin dont le load est plus faible que le sien d'une - quantité plus grande que 2, il délègue une tâche. - - Le noeud racine délègue toutes ses tâches et sert uniquement - pour les entrées-sorties - - Comportement indéterminé lorsqu'un noeud se déconnecte - (des processus peuvent disparaître, le réseau est cassé...) - - Les canaux sont identifiés par le type ident décrit - ci-dessus. Lorsque quelqu'un écrit sur un canal, tout le - monde le sait. Lorsque quelqu'un lit sur un canal, tout le - monde le sait. (on n'est pas capable de déterminer - quel est le noeud propriétaire du processus devant lire - le message) Les communications sont donc coûteuses. - *) - - type 'a process = (unit -> 'a) - - type 'a in_port = ident - type 'a out_port = ident - - let cin = (0, 0, 0, 0) - let cout = (0, 0, 0, 1) + (* L'idée : + - L'ensemble des noeuds qui font du calcul est un arbre. + Le premier noeud lancé est la racine de l'arbre ; tous les + noeuds qui se connectent par la suite se connectent à un + noeud déjà présent et sont donc son fils. + - Les processus sont des fermetures de type unit -> unit, + transmises par des canaux + - Un noeud de calcul est un processus ocaml avec un seul + thread. Le parallélisme est coopératif (penser à faire + des binds assez souvent). + - Les noeuds publient régulièrement leur load, ie le nombre + de processus en attente et qui ne sont pas en train + d'attendre des données depuis un canal. Si un noeud a un + voisin dont le load est plus faible que le sien d'une + quantité plus grande que 2, il délègue une tâche. + - Le noeud racine délègue toutes ses tâches et sert uniquement + pour les entrées-sorties + - Comportement indéterminé lorsqu'un noeud se déconnecte + (des processus peuvent disparaître, le réseau est cassé...) + - Les canaux sont identifiés par le type ident décrit + ci-dessus. Lorsque quelqu'un écrit sur un canal, tout le + monde le sait. Lorsque quelqu'un lit sur un canal, tout le + monde le sait. (on n'est pas capable de déterminer + quel est le noeud propriétaire du processus devant lire + le message) Les communications sont donc coûteuses. + - On garantit que si chaque canal est lu par un processus + et écrit par un autre, alors l'ordre des messages est + conservé. On ne garantit pas l'ordre s'il y a plusieurs + écrivains, et on est à peu près sûrs que le réseau va + planter s'il y a plusieurs lecteurs. + *) + + type 'a process = (('a -> unit) option) -> unit + + type 'a in_port = ident + type 'a out_port = ident + + type task = unit -> unit + + let tasks = Queue.create () + let read_wait_tasks = Hashtbl.create 42 + + let channels = Hashtbl.create 42 + + type host_id = string + type message = host_id * message_data + (* message contains sender ID *) + and message_data = + | Hello + | LoadAdvert of host_id * int + (* Host X has N tasks waiting *) + | Delegate of task + (* I need you to do this for me *) + | SendChan of ident * string + (* Put message in buffer *) + | RecvChan of ident + (* Read message from buffer (everybody clear it from + memory !) *) + | IOWrite of string + | Bye + + let peers = Hashtbl.create 12 (* host_id -> in_chan * out_chan *) + let parent = ref "" (* id of parent *) + let myself = ref "" + + let tell peer msg = + let _, o = Hashtbl.find peers peer in + Marshall.to_channel o msg + + let tell_all msg = + Hashtbl.iter peers + (fun _ (_, o) -> Marshall.to_channel o msg) + + let tell_all_except peer msg = + Hashtbl.iter peers + (fun k (_, o) -> if k <> peer then + Marshall.to_channel o msg) + + let io_read () = "" + let io_write msg = + tell !parent (!myself, IOWrite msg) + + let new_channel () = + let x = gen_ident () in x, x + + let put port x = + fun cont -> + tell_all (!myself, SendChan(port, Marshal.to_string x)); + match cont with + | Some cont -> Queue.push cont tasks + | None -> () + + let rec get port = + fun cont -> + try + let p = Hashtbl.find channels port in + let v = Queue.pop p in + tell_all (!myself, RecvChan port) + match cont with + | None -> () + | Some -> Queue.push (fun () -> cont v) tasks + with _ -> (* no message in queue *) + Hashtbl.add read_wait_tasks + port (fun () -> get port cont) end diff --git a/src/primes.ml b/src/primes.ml index e0eeed7..924f7d3 100644 --- a/src/primes.ml +++ b/src/primes.ml @@ -25,7 +25,7 @@ module Primes (K : Kahn.S) = struct let rec primes (qi : int in_port) : unit process = (get qi) >>= (fun v -> if v <> -1 then begin - Format.printf "%d@." v; + io_write ((string_of_int v)^"\n"); (delay new_channel ()) >>= (fun (qi2, qo2) -> doco [ filter v qi qo2 ; primes qi2 ]) end else return ()) @@ -36,7 +36,7 @@ module Primes (K : Kahn.S) = struct end -module Eng = Kahn.Pipe +module Eng = Kahn.Seq module P = Primes(Eng) let () = P.K.run P.main |