Quelle newProfile.ml Sprache: SML

(************************************************************************)
(*         *      The Rocq Prover / The Rocq Development Team           *)
(*  v      *         Copyright INRIA, CNRS and contributors             *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(*   \VV/  **************************************************************)
(*    //   *    This file is distributed under the terms of the         *)
(*         *     GNU Lesser General Public License Version 2.1          *)
(*         *     (see LICENSE file for the text of the license)         *)
(************************************************************************)

module MiniJson = struct
  type t =[
    | `Intlit of string
    | `String of string
    | `Assoc of (string * t) list
    | `List of t list
  ]

  (* https://www.ietf.org/rfc/rfc4627.txt *)
  (* https://github.com/ocaml-community/yojson/blob/4c1d4b52f9e87a4bd3b7f26111e8a4976c1e8676/lib/write.ml#L27 *)
  let prstring ch s =
    let buf = Buffer.create (String.length s) in
    let encode c =
      match c with
      | '"' -> Buffer.add_string buf "\\\""
      | '\\' -> Buffer.add_string buf "\\\\"
      | '\b' -> Buffer.add_string buf "\\b"
      | '\012' -> Buffer.add_string buf "\\f"
      | '\n' -> Buffer.add_string buf "\\n"
      | '\r' -> Buffer.add_string buf "\\r"
      | '\t' -> Buffer.add_string buf "\\t"
      | '\x00'..'\x1F'
      | '\x7F' ->
          Buffer.add_string buf (Printf.sprintf "\\u%04x" (Char.code c))
      | _ -> Buffer.add_char buf c
    in
    String.iter encode s;
    Format.fprintf ch "\"%s\"" (Buffer.contents buf)

  let rec pr ch : t -> _ = function
    | `String s -> prstring ch s
    | `Intlit s -> Format.fprintf ch "%s" s
    | `Assoc elts ->
      Format.fprintf ch "{ %a }" prrecord elts
    | `List elts ->
      Format.fprintf ch "[\n%a\n]" prarray elts

  and prrecord ch = function
    | [] -> ()
    | [(x,v)] -> Format.fprintf ch "%a: %a" prstring x pr v
    | (x,v) :: l -> Format.fprintf ch "%a: %a, %a" prstring x pr v prrecord l

  and prarray ch = function
    | [] -> ()
    | [x] -> pr ch x
    | x :: l -> Format.fprintf ch "%a,\n%a" pr x prarray l

  let pid = Unix.getpid()

  let pids = string_of_int pid
  let base = [("pid", `Intlit pids); ("tid", `Intlit pids)]

  let duration ~name ~ph ~ts ?args () =
    let l = ("name", `String name) :: ("ph", `String ph) :: ("ts", `Intlit ts) :: base in
    let l = match args with
      | None -> l
      | Some args -> ("args", `Assoc args) :: l
    in
    `Assoc l
end

type sums = (float * int) CString.Map.t

let empty_sums : sums = CString.Map.empty

let sums_union a b =
  CString.Map.union (fun _name (l,cnt) (r,cnt') ->
      Some (l +. r, cnt + cnt'))
    a b

type accu = {
  output : Format.formatter option;
  accumulate : MiniJson.t list ref option;
  mutable sums : (float * sums) list;
}

let accu = ref None

let is_profiling () = Option.has_some !accu

let gettime = Unix.gettimeofday

let gettimeopt = function
  | Some t -> t
  | None -> gettime()

let prtime t =
  Format.sprintf "%.0f" (t *. 1E6)

module Counters = struct

  (* time is handled separately because it has special status in the output format *)
  type t = {
    major_words : float;
    minor_words : float;
    major_collections : int;
    minor_collections : int;
    instr : System.instruction_count;
  }

  let zero = {
    major_words = 0.;
    minor_words = 0.;
    major_collections = 0;
    minor_collections = 0;
    instr = Ok 0L;
  }

  let get () =
    let gc = Gc.quick_stat() in
    {
      major_words = gc.major_words;
      minor_words = gc.minor_words;
      major_collections = gc.major_collections;
      minor_collections = gc.minor_collections;
      instr = Instr.read_counter();
    }

  let global_start = get ()

  let (+) a b = {
    major_words = a.major_words +. b.major_words;
    minor_words = a.minor_words +. b.minor_words;
    major_collections = a.major_collections + b.major_collections;
    minor_collections = a.minor_collections + b.minor_collections;
    instr = System.instruction_count_add a.instr b.instr;
  }

  let (-) b a = {
    major_words = b.major_words -. a.major_words;
    minor_words = b.minor_words -. a.minor_words;
    major_collections = b.major_collections - a.major_collections;
    minor_collections = b.minor_collections - a.minor_collections;
    instr = System.instructions_between ~c_start:a.instr ~c_end:b.instr;
  }

  let print x =
    let open Pp in
    let ppw diff = str (Format.sprintf "%.3G words" diff) in
    v 0 @@
    prlist_with_sep spc (fun x -> hov 0 x)
      ((str "major words:" ++ spc() ++ ppw x.major_words) ::
       (str "minor words:" ++ spc() ++ ppw x.minor_words) ::
       (str "major collections:" ++ spc() ++ int x.major_collections) ::
       (str "minor collections:" ++ spc() ++ int x.minor_collections) ::
       match x.instr with
       | Ok count -> [str "instructions:" ++ spc() ++ str (Int64.to_string count)]
       | Error _ -> [])

  let format x =
    let ppw diff = `String (Format.sprintf "%.3G w" diff) in
    let ppi i = `Intlit (string_of_int i) in
    let instr = match x.instr with
      | Ok count -> [("instr", `Intlit (Int64.to_string count))]
      | Error _ -> []
    in
    ("major_words",ppw x.major_words) ::
    ("minor_words", ppw x.minor_words) ::
    ("major_collect", ppi x.major_collections) ::
    ("minor_collect", ppi x.minor_collections) ::
    instr

  let make_diffs ~start ~stop = format (stop - start)

end

let global_start_time = gettime ()

let output_event json ?(last=",") () =
  let accu = Option.get !accu in
  accu.output |> Option.iter (fun ch ->
      Format.fprintf ch "%a%s\n" MiniJson.pr json last);
  accu.accumulate |> Option.iter (fun out ->
      out := json :: !out)

let duration ~time name ph ?args ?last () =
  let duration = MiniJson.duration ~name ~ph ~ts:(prtime time) ?args () in
  output_event duration ?last ()

let enter_sums ?time () =
  let accu = Option.get !accu in
  let time = gettimeopt time in
  accu.sums <- (time, CString.Map.empty) :: accu.sums

let enter ?time name ?args () =
  let time = gettimeopt time in
  enter_sums ~time ();
  duration ~time name "B" ?args ()

let leave_sums ?time name () =
  let accu = Option.get !accu in
  let time = gettimeopt time in
  match accu.sums with
  | [] -> assert false
  | [start,sum] -> accu.sums <- []; sum, time -. start
  | (start, sum) :: (start', next) :: rest ->
    let dur = time -. start in
    let next = CString.Map.update name (function
        | None -> Some (dur, 1)
        | Some (dur', cnt) -> Some (dur +. dur', cnt+1))
        next
    in
    let next = CString.Map.union (fun name' (l,cnt) (r,cnt') ->
        if String.equal name name' then Some (r,cnt+cnt')
        else Some (l +. r, cnt+cnt'))
        sum next
    in
   accu. sums <- (start', next) :: rest;
    sum, dur

let rec pptime fmt t = let open Format in function
  | [] -> assert false
  | [unit] ->
    if t >= 1. then fprintf fmt "%03.0f%s" t unit
    else fprintf fmt "0%s" unit
  | unit :: nextunit :: rest ->
    (* float t is time in [unit] *)
    if t >= 1. then fprintf fmt "%03.0f%s %03.0f%s" t unit (Float.rem (t *. 1_000.) 1_000.) nextunit
    else pptime fmt (t *. 1_000.) (nextunit :: rest)

let pptime fmt t = pptime fmt t ["s";"ms";"us";"ns"]

let leave ?time name ?(args=[]) ?last () =
  let time = gettimeopt time in
  let sum, dur = leave_sums ~time name () in
  let sum = CString.Map.bindings sum in
  let sum = List.sort (fun (_,(t1,_)) (_,(t2,_)) -> Float.compare t2 t1) sum in
  let sum = List.map (fun (name, (t, cnt)) ->
      name, `String
        (Format.asprintf "%a, %d %s" pptime t cnt (CString.plural cnt "call")))
      sum
  in
  let args = ("subtimes", `Assoc sum) :: args in
  duration ~time name "E" ~args ?last ()

(* NB: "process" and "init" are unconditional because they don't go
   through [profile] and I'm too lazy to make them conditional *)
let components = ref CString.Pred.empty

let profile name ?args f () =
  if not (is_profiling ()) then f ()
  else if CString.Pred.mem name !components then begin
    let args = Option.map (fun f -> f()) args in
    enter name ?args ();
    let start = Counters.get () in
    let v = try f ()
      with e ->
        let e = Exninfo.capture e in
        let args = Counters.make_diffs ~start ~stop:(Counters.get()) in
        leave name ~args ();
        Exninfo.iraise e
    in
    let args = Counters.make_diffs ~start ~stop:(Counters.get()) in
    leave name ~args ();
    v
  end
  else begin
    enter_sums ();
    let v = try f ()
      with e ->
        let e = Exninfo.capture e in
        ignore (leave_sums name () : _ * _);
        Exninfo.iraise e
    in
    ignore (leave_sums name () : _ * _);
    v
  end

let format_header ch =
  Format.fprintf ch "{ \"traceEvents\": [\n"

let format_footer ch =
  Format.fprintf ch "],\n\"displayTimeUnit\": \"us\" }@."

type settings =
  { output : Format.formatter;
    fname : string;
  }

let init_components () =
  let s = Envars.getenv_rocq "_PROFILE_COMPONENTS" in
  let s = Option.default "-unification,Conversion" s in
  let v =
    if CString.is_prefix "-" s then
    List.fold_left (fun cs c -> CString.Pred.remove c cs)
      CString.Pred.full
      (String.split_on_char ',' (CString.sub s 1 (String.length s - 1)))
  else
    List.fold_left (fun cs c -> CString.Pred.add c cs)
      CString.Pred.empty
      (String.split_on_char ',' s)
  in
  components := v

let init { output; fname; } =
  let () = assert (not (is_profiling())) in
  init_components();
  accu := Some { output = Some output; accumulate = None; sums = []; };
  format_header output;
  enter ~time:global_start_time ~args:["fname", `String fname] "process" ();
  enter ~time:global_start_time "init" ();
  let args = Counters.(make_diffs ~start:global_start ~stop:(get())) in
  leave "init" ~args ()

let pause () =
  let v = !accu in
  accu := None;
  v

let resume v =
  assert (not (is_profiling()));
  accu := Some v

let finish () = match !accu with
  | None | Some { output = None } -> assert false
  | Some { output = Some ch } ->
    let args = Counters.(make_diffs ~start:global_start ~stop:(get())) in
    leave "process" ~last:"" ~args ();
    format_footer ch;
    accu := None

let insert_sums sums =
  let accu = Option.get !accu in
  match accu.sums with
  | [] -> assert false
  | (start, sums') :: rest ->
    let sums = sums_union sums sums' in
    accu.sums <- (start, sums) :: rest

let insert_results events sums =
  List.iter (fun e -> output_event e ()) events;
  insert_sums sums

let with_profiling f =
  let out = ref [] in
  let this_accu, old_accu = match !accu with
    | None ->
      init_components();
      { output = None;
        accumulate = Some out;
        sums = [0., empty_sums];
      }
    , None
    | Some accu ->
      { output = accu.output;
        accumulate = Some out;
        sums = [0., empty_sums];
      }
      , Some accu
  in
  let finally () =
    let out = List.rev !out in
    let sums = match this_accu.sums with
      | [_, x] -> x
      | _ -> assert false
    in
    accu := old_accu;
    let () = match old_accu with
      | None -> ()
      | Some accu ->
        (* events have already been output to the formatter if there is one *)
        accu.accumulate |> Option.iter (fun accumulate ->
            accumulate := List.rev_append out !accumulate);
        insert_sums sums
    in
    out, sums
  in
  accu := Some this_accu;
  let v = try f () with e ->
    let e = Exninfo.capture e in
    ignore (finally() : _ * _);
    Exninfo.iraise e
  in

  let out, sums = finally () in

  out, sums, v

quality99%

¤ Dauer der Verarbeitung: 0.12 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.