end
let lord t ~njobs ~vassals ~ic ~ocs =
- eprintf "[debug] [lord] started\n%!";
let active_vassals = ref njobs in
let results = Queue.create () in
- let rec dispatch () =
- match Ipc.recv ic with
- | ((Exiting i) : ('input, 'output) msg_from_vassal) ->
+ let rec loop () =
+ match ((Ipc.recv ic) : ('input, 'output) msg_from_vassal) with
+ | Exiting i ->
close_out ocs.(i);
decr active_vassals;
- if !active_vassals = 0 then
- ()
- else
- dispatch ()
- | ((Ready i) : ('input, 'output) msg_from_vassal) ->
+ if !active_vassals = 0 then () else loop ()
+ | Ready i ->
Ipc.send ocs.(i) (Job (next t));
- dispatch ()
- | ((Result (i, result)) : ('input, 'output) msg_from_vassal) ->
+ loop ()
+ | Result (i, result) ->
Queue.add result results;
Ipc.send ocs.(i) (Job (next t));
- dispatch ()
+ loop ()
in
let rec wait = function
- | [] -> ()
+ | [] ->
+ ()
| vassals ->
let pid, _process_status = Unix.wait () in
(* TODO: handle process_status *)
wait (List.filter vassals ~f:(fun p -> p <> pid))
in
- dispatch ();
+ loop ();
close_in ic;
wait vassals;
of_queue results
let vassal i ~f ~vassal_pipe_r ~lord_pipe_w =
- eprintf "[debug] [vassal %d] started\n%!" i;
let ic = Unix.in_channel_of_descr vassal_pipe_r in
let oc = Unix.out_channel_of_descr lord_pipe_w in
- let rec work msg =
- Ipc.send oc msg;
- match Ipc.recv ic with
- | (Job (Some x) : 'input msg_from_lord) ->
- work (Result (i, (x, f x)))
- | (Job None : 'input msg_from_lord) ->
+ let rec loop () =
+ match (Ipc.recv ic : 'input msg_from_lord) with
+ | Job (Some x) ->
+ Ipc.send oc (Result (i, (x, f x)));
+ loop ()
+ | Job None ->
Ipc.send oc (Exiting i)
in
- work (Ready i);
+ Ipc.send oc (Ready i);
+ loop ();
close_in ic;
close_out oc;
exit 0
end
module In_channel : sig
- val lines : in_channel -> string Stream.t
+ val lines : ?delim_null:bool -> in_channel -> string Stream.t
end = struct
- let lines ic =
- Stream.create (fun () ->
- match input_line ic with
- | exception End_of_file ->
- None
- | line ->
- Some line
- )
+ let read_until_newline ic () =
+ match input_line ic with
+ | exception End_of_file ->
+ None
+ | line ->
+ Some line
+
+ let read_until_null ic =
+ let lexbuf = Lexing.from_channel ic in
+ fun () -> Input_delim.by_null lexbuf
+
+ let lines ?(delim_null=false) ic =
+ let reader =
+ if delim_null then
+ read_until_null ic
+ else
+ read_until_newline ic
+ in
+ Stream.create reader
end
module File : sig
val lookup : string Stream.t -> t Stream.t
(** Lookup file info for given paths *)
+ val head : t -> len:int -> metrics:M.t -> string
+
val filter_out_unique_sizes : t Stream.t -> metrics:M.t -> t Stream.t
val filter_out_unique_heads : t Stream.t -> len:int -> metrics:M.t -> t Stream.t
end = struct
~group:(fun {size; _} -> size)
~handle_singleton:(fun (size, _, _) -> M.file_unique_size metrics ~size)
- let head path ~len ~metrics =
+ let head {path; _} ~len ~metrics =
+ M.file_sampled metrics;
let buf = Bytes.make len ' ' in
let ic = open_in_bin path in
let rec read pos len =
let filter_out_unique_heads files ~len ~metrics =
filter_out_singletons
files
- ~group:(fun {path; _} ->
- M.file_sampled metrics;
- head path ~len ~metrics
- )
+ ~group:(head ~len ~metrics)
~handle_singleton:(fun (_, _, files) ->
let {size; _} = List.hd files in (* Guaranteed non-empty *)
M.file_unique_sample metrics ~size
; ignore : string -> bool
; sample : int
; njobs : int
+ ; delim_null : bool
}
-let make_input_stream input ignore ~metrics =
+let make_input_stream input ignore ~metrics ~delim_null =
let input =
match input with
| Stdin ->
- File.lookup (In_channel.lines stdin)
+ File.lookup (In_channel.lines stdin ~delim_null)
| Directories paths ->
let paths = StrSet.elements (StrSet.of_list paths) in
Stream.concat (List.map paths ~f:File.find)
let time_proc () =
Sys.time ()
-let main {input; output; ignore; sample = sample_len; njobs} =
+let main {input; output; ignore; sample = sample_len; njobs; delim_null} =
let wt0_all = time_wall () in
let pt0_all = time_proc () in
let metrics = M.init () in
let output = make_output_fun output in
- let input = make_input_stream input ignore ~metrics in
+ let input = make_input_stream input ignore ~metrics ~delim_null in
(* TODO: Make a nice(r) abstraction to re-assemble pieces in the pipeline:
*
* from input to files_by_size
let wt0_group_by_sample = wt1_group_by_size in
let pt0_group_by_sample = pt1_group_by_size in
eprintf "[debug] filtering-out files with unique heads\n%!";
- let files = File.filter_out_unique_heads files ~len:sample_len ~metrics in
+ let files =
+ if njobs > 1 then begin
+ let q = Queue.create () in
+ files
+ |> Stream.bag_map ~njobs ~f:(File.head ~len:sample_len ~metrics)
+ |> Stream.group_by ~f:snd
+ |> Stream.map ~f:(fun (d, n, pairs) -> (d, n, List.map pairs ~f:fst))
+ |> Stream.filter ~f:(fun (_, n, _) -> n > 1)
+ |> Stream.iter ~f:(fun (_, _, fs) -> List.iter fs ~f:(fun f -> Queue.add f q))
+ ;
+ Stream.of_queue q
+ end else
+ File.filter_out_unique_heads files ~len:sample_len ~metrics
+ in
let pt1_group_by_sample = time_proc () in
let wt1_group_by_sample = time_wall () in
eprintf "[debug] hashing\n%!";
let groups =
if njobs > 1 then
- let digests =
+ let with_digests =
Stream.bag_map files ~njobs ~f:(fun {File.path; _} -> Digest.file path)
in
- Stream.map (Stream.group_by digests ~f:(fun (_, d) -> d)) ~f:(
+ Stream.map (Stream.group_by with_digests ~f:snd) ~f:(
fun (digest, n, file_digest_pairs) ->
let files =
List.map file_digest_pairs ~f:(fun (file, _) ->
eprintf "[debug] reporting\n%!";
Stream.iter groups ~f:(fun (d, n, files) ->
M.digest metrics;
- if n > 1 then
+ if n > 1 then begin
M.redundant_data metrics ~size:(n * (List.hd files).File.size);
output d n files
+ end
);
let pt1_all = time_proc () in
let output = ref Stdout in
let ignore = ref (fun _ -> false) in
let sample = ref 512 in
- let njobs = ref 8 in
+ let njobs = ref 6 in
+ let input_delim_null = ref false in
let spec =
[ ( "-out"
, Arg.String (fun path ->
, Arg.Set_int njobs
, (sprintf " Number of parallel jobs. Default: %d" !njobs)
)
+ ; ( "-0"
+ , Arg.Set input_delim_null
+ , ( sprintf
+ ( " Delimit input paths by null character instead of a newline."
+ ^^" Meaningful only when reading candidate paths from stdin."
+ ^^" Default: %B"
+ )
+ !input_delim_null
+ )
+ )
]
in
Arg.parse
; ignore = !ignore
; sample = !sample
; njobs = !njobs
+ ; delim_null = !input_delim_null
}
let () =
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