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(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Damien Doligez, projet Para, INRIA Rocquencourt *)
(* Jacques-Henri Jourdan, projet Gallium, INRIA Paris *)
(* *)
(* Copyright 1996-2016 Institut National de Recherche en Informatique *)
(* et en Automatique. *)
(* *)
(* All rights reserved. This file is distributed under the terms of *)
(* the GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
type stat = {
minor_words : float;
promoted_words : float;
major_words : float;
minor_collections : int;
major_collections : int;
heap_words : int;
heap_chunks : int;
live_words : int;
live_blocks : int;
free_words : int;
free_blocks : int;
largest_free : int;
fragments : int;
compactions : int;
top_heap_words : int;
stack_size : int;
forced_major_collections: int;
}
type control = {
minor_heap_size : int;
major_heap_increment : int;
space_overhead : int;
verbose : int;
max_overhead : int;
stack_limit : int;
allocation_policy : int;
window_size : int;
custom_major_ratio : int;
custom_minor_ratio : int;
custom_minor_max_size : int;
}
external stat : unit -> stat = "caml_gc_stat"
external quick_stat : unit -> stat = "caml_gc_quick_stat"
external counters : unit -> (float * float * float) = "caml_gc_counters"
external minor_words : unit -> (float [@unboxed])
= "caml_gc_minor_words" "caml_gc_minor_words_unboxed"
external get : unit -> control = "caml_gc_get"
external set : control -> unit = "caml_gc_set"
external minor : unit -> unit = "caml_gc_minor"
external major_slice : int -> int = "caml_gc_major_slice"
external major : unit -> unit = "caml_gc_major"
external full_major : unit -> unit = "caml_gc_full_major"
external compact : unit -> unit = "caml_gc_compaction"
external get_minor_free : unit -> int = "caml_get_minor_free"
let eventlog_pause () = ()
let eventlog_resume () = ()
open Printf
let print_stat c =
let st = stat () in
fprintf c "minor_collections: %d\n" st.minor_collections;
fprintf c "major_collections: %d\n" st.major_collections;
fprintf c "compactions: %d\n" st.compactions;
fprintf c "forced_major_collections: %d\n" st.forced_major_collections;
fprintf c "\n";
let l1 = String.length (sprintf "%.0f" st.minor_words) in
fprintf c "minor_words: %*.0f\n" l1 st.minor_words;
fprintf c "promoted_words: %*.0f\n" l1 st.promoted_words;
fprintf c "major_words: %*.0f\n" l1 st.major_words;
fprintf c "\n";
let l2 = String.length (sprintf "%d" st.top_heap_words) in
fprintf c "top_heap_words: %*d\n" l2 st.top_heap_words;
fprintf c "heap_words: %*d\n" l2 st.heap_words;
fprintf c "live_words: %*d\n" l2 st.live_words;
fprintf c "free_words: %*d\n" l2 st.free_words;
fprintf c "largest_free: %*d\n" l2 st.largest_free;
fprintf c "fragments: %*d\n" l2 st.fragments;
fprintf c "\n";
fprintf c "live_blocks: %d\n" st.live_blocks;
fprintf c "free_blocks: %d\n" st.free_blocks;
fprintf c "heap_chunks: %d\n" st.heap_chunks
let allocated_bytes () =
let (mi, pro, ma) = counters () in
(mi +. ma -. pro) *. float_of_int (Sys.word_size / 8)
external finalise : ('a -> unit) -> 'a -> unit = "caml_final_register"
external finalise_last : (unit -> unit) -> 'a -> unit =
"caml_final_register_called_without_value"
external finalise_release : unit -> unit = "caml_final_release"
type alarm = bool Atomic.t
type alarm_rec = {active : alarm; f : unit -> unit}
let rec call_alarm arec =
if Atomic.get arec.active then begin
let finally () = finalise call_alarm arec in
Fun.protect ~finally arec.f
end
let create_alarm f =
let arec = { active = Atomic.make true; f = f } in
finalise call_alarm arec;
arec.active
let delete_alarm a = Atomic.set a false
module Memprof =
struct
type allocation_source = Normal | Marshal | Custom
type allocation =
{ n_samples : int;
size : int;
source : allocation_source;
callstack : Printexc.raw_backtrace }
type ('minor, 'major) tracker = {
alloc_minor: allocation -> 'minor option;
alloc_major: allocation -> 'major option;
promote: 'minor -> 'major option;
dealloc_minor: 'minor -> unit;
dealloc_major: 'major -> unit;
}
let null_tracker = {
alloc_minor = (fun _ -> None);
alloc_major = (fun _ -> None);
promote = (fun _ -> None);
dealloc_minor = (fun _ -> ());
dealloc_major = (fun _ -> ());
}
external c_start :
float -> int -> ('minor, 'major) tracker -> unit
= "caml_memprof_start"
let start
~sampling_rate
?(callstack_size = max_int)
tracker =
c_start sampling_rate callstack_size tracker
external stop : unit -> unit = "caml_memprof_stop"
end
|
