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