package gapi-ocaml
A simple OCaml client for Google Services
Install
Dune Dependency
Authors
Maintainers
Sources
v0.4.6.tar.gz
sha256=b84b680528a5e050014103a8e7a60a5d43efd5fefc3f838310bd46769775ab48
md5=8ee26acf1f6c6f5e24c7b57fa070a0a2
doc/src/gapi-ocaml.netsys-local/netsys_mem.ml.html
Source file netsys_mem.ml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
(* $Id$ *) open Netsys_types open Printf type memory = (char,Bigarray.int8_unsigned_elt,Bigarray.c_layout) Bigarray.Array1.t external blit_memory_to_string_unsafe : memory -> int -> Bytes.t -> int -> int -> unit = "netsys_blit_memory_to_string" NOALLOC external blit_memory_to_bytes_unsafe : memory -> int -> Bytes.t -> int -> int -> unit = "netsys_blit_memory_to_string" NOALLOC external blit_string_to_memory_unsafe : string -> int -> memory -> int -> int -> unit = "netsys_blit_string_to_memory" NOALLOC external blit_bytes_to_memory_unsafe : Bytes.t -> int -> memory -> int -> int -> unit = "netsys_blit_string_to_memory" NOALLOC let blit_memory_to_bytes mem memoff s soff len = let memlen = Bigarray.Array1.dim mem in let slen = Bytes.length s in if len < 0 || memoff < 0 || memoff > memlen - len || soff < 0 || soff > slen - len then invalid_arg "Netsys_mem.blit_memory_to_bytes"; blit_memory_to_bytes_unsafe mem memoff s soff len let blit_memory_to_string = blit_memory_to_bytes let blit_string_to_memory s soff mem memoff len = let memlen = Bigarray.Array1.dim mem in let slen = String.length s in if len < 0 || memoff < 0 || memoff > memlen - len || soff < 0 || soff > slen - len then invalid_arg "Netsys_mem.blit_string_to_memory"; blit_string_to_memory_unsafe s soff mem memoff len let blit_bytes_to_memory s soff mem memoff len = blit_string_to_memory (Bytes.unsafe_to_string s) soff mem memoff len let memory_of_string s = let n = String.length s in let m = Bigarray.Array1.create Bigarray.char Bigarray.c_layout n in blit_string_to_memory s 0 m 0 n; m let memory_of_bytes s = memory_of_string (Bytes.unsafe_to_string s) let bytes_of_memory m = let n = Bigarray.Array1.dim m in let s = Bytes.create n in blit_memory_to_bytes m 0 s 0 n; s let string_of_memory m = Bytes.unsafe_to_string (bytes_of_memory m) external memory_address : memory -> nativeint = "netsys_memory_address" external reshape : 'a -> memory = "netsys_reshape" (* 'a = any bigarray *) let memory_of_bigarray b = reshape b let memory_of_bigarray_1 b = reshape b let memory_of_bigarray_2 b = reshape b let memory_of_bigarray_3 b = reshape b external getpagesize : unit -> int = "netsys_getpagesize" let pagesize = try getpagesize() with Invalid_argument _ -> 4096 external netsys_alloc_memory_pages : nativeint -> int -> bool -> memory = "netsys_alloc_memory_pages" let alloc_memory_pages ?(addr=0n) ?(exec=false) len = netsys_alloc_memory_pages addr len exec external alloc_aligned_memory : int -> int -> memory = "netsys_alloc_aligned_memory" external netsys_map_file : Unix.file_descr -> int64 -> nativeint -> bool -> int -> memory = "netsys_map_file" let memory_map_file fd ?(pos=0L) ?(addr=0n) shared size = netsys_map_file fd pos addr shared size external memory_unmap_file : memory -> unit = "netsys_memory_unmap_file" external netsys_zero_pages : memory -> int -> int -> unit = "netsys_zero_pages" let zero_pages mem pos len = let memlen = Bigarray.Array1.dim mem in if len < 0 || pos < 0 || pos > memlen - len then invalid_arg "Netsys_mem.zero_pages (index out of range)"; netsys_zero_pages mem pos len external grab : native int -> memory = "netsys_grab" external as_value : memory -> int -> 'a = "netsys_as_value" let as_obj mem offs = Obj.repr(as_value mem offs) (* external netsys_value_area_add : memory -> unit = "netsys_value_area_add" external netsys_value_area_remove : memory -> unit = "netsys_value_area_remove" let value_area m = netsys_value_area_add m; Gc.finalise netsys_value_area_remove m; () *) external obj_address : Obj.t -> nativeint = "netsys_obj_address" external hdr_address : Obj.t -> nativeint = "netsys_hdr_address" external init_header : memory -> int -> int -> int -> unit = "netsys_init_header" external cmp_bytes : Bytes.t -> Bytes.t -> int = "netsys_cmp_string" external cmp_string : string -> string -> int = "netsys_cmp_string" external netsys_init_string : memory -> int -> int -> unit = "netsys_init_string" let init_string_bytelen len = let ws = Sys.word_size / 8 in (* word size in bytes *) ((len + ws) / ws + 1) * ws exception Out_of_space let _ = Callback.register_exception "Netsys_mem.Out_of_space" Out_of_space let init_string mem offset len = let ws = Sys.word_size / 8 in (* word size in bytes *) let memlen = Bigarray.Array1.dim mem in if offset < 0 || len < 0 then invalid_arg "Netsys_mem.init_string"; let blen = init_string_bytelen len in if blen > memlen - offset then raise Out_of_space; netsys_init_string mem offset len; (offset+ws, blen) let init_array_bytelen size = let ws = Sys.word_size / 8 in (* word size in bytes *) (size + 1) * ws let init_array mem offset size = let ws = Sys.word_size / 8 in (* word size in bytes *) let memlen = Bigarray.Array1.dim mem in if offset < 0 || size < 0 then invalid_arg "Netsys_mem.init_array"; let blen = init_array_bytelen size in if blen > memlen - offset then raise Out_of_space; init_header mem offset 0 size; Bigarray.Array1.fill (Bigarray.Array1.sub mem (offset+ws) (size*ws)) '\001'; (offset+ws, blen) let init_float_array_bytelen size = let ws = Sys.word_size / 8 in (* word size in bytes *) if ws = 4 then (2*size + 1) * ws else (size+1) * ws let init_float_array mem offset size = let ws = Sys.word_size / 8 in (* word size in bytes *) let memlen = Bigarray.Array1.dim mem in if offset < 0 || size < 0 then invalid_arg "Netsys_mem.init_array"; let blen = init_float_array_bytelen size in if blen > memlen - offset then raise Out_of_space; init_header mem offset Obj.double_array_tag size; Bigarray.Array1.fill (Bigarray.Array1.sub mem (offset+ws) (size*ws)) '\001'; (offset+ws, blen) type init_value_flag = | Copy_bigarray | Copy_custom_int | Copy_atom | Copy_simulate | Copy_conditionally | Keep_atom type custom_ops = nativeint (* external netsys_init_value : memory -> int -> 'a -> init_value_flag list -> nativeint -> (string * custom_ops) list -> ((int*int) list) -> (int * int) = "netsys_init_value_bc" "netsys_init_value" let init_value ?targetaddr ?(target_custom_ops=[]) ?(cc=[]) mem offset v flags = let taddr = match targetaddr with | None -> memory_address mem | Some a -> a in let cc = List.map (fun (s,e) -> ( Nativeint.to_int (Nativeint.shift_right s 1), Nativeint.to_int (Nativeint.shift_right e 1) ) ) cc in netsys_init_value mem offset v flags taddr target_custom_ops cc external get_custom_ops : 'a -> string * custom_ops = "netsys_get_custom_ops" external copy_value : init_value_flag list -> 'a -> 'a = "netsys_copy_value" *) type color = White | Gray | Blue | Black (* external color : Obj.t -> color = "netsys_color" external set_color : Obj.t -> color -> unit = "netsys_set_color" external is_bigarray : Obj.t -> bool = "netsys_is_bigarray" *) external netsys_mem_read : Unix.file_descr -> memory -> int -> int -> int = "netsys_mem_read" external netsys_mem_write : Unix.file_descr -> memory -> int -> int -> int = "netsys_mem_write" let mem_read fd mem off len = if len < 0 || off < 0 || len > Bigarray.Array1.dim mem - off then invalid_arg "Netsys_mem.mem_read"; netsys_mem_read fd mem off len let mem_write fd mem off len = if len < 0 || off < 0 || len > Bigarray.Array1.dim mem - off then invalid_arg "Netsys_mem.mem_write"; netsys_mem_write fd mem off len external netsys_mem_recv : Unix.file_descr -> memory -> int -> int -> Unix.msg_flag list -> int = "netsys_mem_recv" (* external netsys_mem_recvfrom : Unix.file_descr -> memory -> int -> int -> Unix.msg_flag list -> int * Unix.sockaddr = "netsys_mem_recvfrom" *) external netsys_mem_send : Unix.file_descr -> memory -> int -> int -> Unix.msg_flag list -> int = "netsys_mem_send" (* external netsys_mem_sendto : Unix.file_descr -> memory -> int -> int -> Unix.msg_flag list -> Unix.sockaddr -> int = "netsys_mem_sendto" "netsys_mem_sendto_native" *) let mem_recv fd mem off len flags = if len < 0 || off < 0 || len > Bigarray.Array1.dim mem - off then invalid_arg "Netsys_mem.mem_recv"; netsys_mem_recv fd mem off len flags (* let mem_recvfrom fd mem off len flags = if len < 0 || off < 0 || len > Bigarray.Array1.dim mem - off then invalid_arg "Netsys_mem.mem_recvfrom"; netsys_mem_recvfrom fd mem off len flags *) let mem_send fd mem off len flags = if len < 0 || off < 0 || len > Bigarray.Array1.dim mem - off then invalid_arg "Netsys_mem.mem_send"; netsys_mem_send fd mem off len flags (* let mem_sendto fd mem off len flags addr = if len < 0 || off < 0 || len > Bigarray.Array1.dim mem - off then invalid_arg "Netsys_mem.mem_sendto"; netsys_mem_sendto fd mem off len flags addr *) let min_pool_factor = 4 let max_pool_factor = 8 type bigblock = { bb_id : < >; mutable bb_use_counter : int; mutable bb_mem : memory; mutable bb_age : int; } type memory_pool = { pool_block_size : int; mutable pool_blocks : (int * bigblock * bool ref) list; (* The bool is set to [false] if the block is unused *) mutable pool_free_blocks : (memory * int * bigblock) list; (* The int is the GC age *) pool_mutex : Netsys_oothr.mutex; mutable pool_factor : int; mutable pool_free_age : int; } let create_pool bsize = if bsize <= 0 || bsize mod pagesize <> 0 then invalid_arg "Netsys_mem.create_pool"; let m = !Netsys_oothr.provider # create_mutex() in { pool_block_size = bsize; pool_blocks = []; pool_free_blocks = []; pool_mutex = m; pool_factor = min_pool_factor; pool_free_age = 0; } let pool_move_to_free_list p = let age = (Gc.quick_stat()).Gc.major_collections in let ub, fb = List.partition (fun (_, _, is_used) -> !is_used) p.pool_blocks in p.pool_blocks <- ub; (* prerr_endline ("Found new free blocks: " ^ string_of_int (List.length fb));*) p.pool_free_blocks <- (List.map (fun (k,bb,_) -> let m = Bigarray.Array1.sub bb.bb_mem (k * p.pool_block_size) p.pool_block_size in (m, k, bb) ) fb ) @ p.pool_free_blocks; List.iter (fun (_,bb,_) -> bb.bb_use_counter <- bb.bb_use_counter - 1; bb.bb_age <- age ) fb (* let bb_finalise _ = prerr_endline "bb_finalise" *) let pool_alloc_blocks p = pool_move_to_free_list p; if p.pool_free_blocks = [] then ( let age = (Gc.quick_stat()).Gc.major_collections in (* Nothing free, so we have to allocate new blocks: *) let bigblock_size = p.pool_factor * p.pool_block_size in let bigblock_mem = try alloc_memory_pages bigblock_size with Invalid_argument _ -> (* OS does not support it... *) Bigarray.Array1.create Bigarray.char Bigarray.c_layout bigblock_size in let bigblock = { bb_id = (object end); bb_use_counter = 0; bb_mem = bigblock_mem; bb_age = age; } in (* Gc.finalise bb_finalise bigblock_mem; *) for k = 0 to p.pool_factor - 1 do let m = Bigarray.Array1.sub bigblock_mem (k * p.pool_block_size) p.pool_block_size in p.pool_free_blocks <- (m, k, bigblock) :: p.pool_free_blocks done; (* prerr_endline ("alloc blocks: " ^ string_of_int p.pool_factor); *) p.pool_factor <- min max_pool_factor (p.pool_factor * 2); ) else p.pool_factor <- min_pool_factor let pool_free_blocks ?(force=false) p = let age = (Gc.quick_stat()).Gc.major_collections in if force || age > p.pool_free_age then ( pool_move_to_free_list p; let db, fb = List.partition (fun (_, _, bb) -> bb.bb_use_counter = 0 && (force || age - bb.bb_age >= 2)) p.pool_free_blocks in (* Sort the free blocks, to achieve that big, filled blocks are preferred when new blocks are taken from the free list. So small and quite empty blocks are more likely to be given back to the OS. - Hopefully this is not too expensive. *) let fb_sorted = List.sort (fun (_,_,bb1) (_,_,bb2) -> (* highest use counter first, then oldest *) match bb2.bb_use_counter - bb1.bb_use_counter with | 0 -> Oo.id bb1.bb_id - Oo.id bb2.bb_id | d -> d ) fb in p.pool_free_blocks <- fb_sorted; p.pool_free_age <- age; (* prerr_endline ("pool_free_blocks db=" ^ string_of_int (List.length db))*) (* unmap_file is not supported for the "bigblock" approach CHECK *) ) let pool_reclaim p = pool_free_blocks ~force:true p let set_false v _ = (* prerr_endline "finaliser"; *) v := false let pool_alloc_memory2 p = Netsys_oothr.serialize p.pool_mutex (fun () -> let do_free_check = ref true in if p.pool_free_blocks = [] then ( pool_alloc_blocks p; do_free_check := false ); match p.pool_free_blocks with | (m,k,bb) :: l -> p.pool_free_blocks <- l; bb.bb_use_counter <- bb.bb_use_counter + 1; let is_used = ref true in let free = set_false is_used in (* avoid referencing m ! *) let free2 = set_false is_used in if !do_free_check && l <> [] then pool_free_blocks p; p.pool_blocks <- (k,bb,is_used) :: p.pool_blocks; Gc.finalise free m; (m,free2) | [] -> assert false ) () let pool_alloc_memory p = fst(pool_alloc_memory2 p) let pool_block_size p = p.pool_block_size let default_block_size = pagesize * 16 let default_pool = create_pool default_block_size let small_block_size = pagesize let small_pool = create_pool small_block_size let pool_report p = let b = Buffer.create 500 in bprintf b "POOL GENERAL PARAMETERS:\n\n"; bprintf b "pool_block_size=%d\n" p.pool_block_size; bprintf b "pool_factor=%d\n" p.pool_factor; bprintf b "length pool_blocks=%d (used+prop)\n" (List.length p.pool_blocks); bprintf b "length pool_free_blocks=%d\n\n" (List.length p.pool_free_blocks); let bb_tab = Hashtbl.create 10 in let add_bb bb = if not (Hashtbl.mem bb_tab bb.bb_id) then ( let cnt_used = ref 0 in let cnt_prop = ref 0 in Hashtbl.add bb_tab bb.bb_id (bb, cnt_used, cnt_prop) ) in List.iter (fun (_,bb,_) -> add_bb bb) p.pool_blocks; List.iter (fun (_,_,bb) -> add_bb bb) p.pool_free_blocks; List.iter (fun (k,bb,is_used) -> let (_,cnt_used,cnt_prop) = Hashtbl.find bb_tab bb.bb_id in if !is_used then incr cnt_used else incr cnt_prop ) p.pool_blocks; bprintf b "POOL BY BIGBLOCK:\n\n"; Hashtbl.iter (fun bb_id (bb,cnt_used,cnt_prop) -> let size = Bigarray.Array1.dim bb.bb_mem / p.pool_block_size in bprintf b "block %d: age=%d size=%d used=%d propagate=%d free=%d\n" (Oo.id bb_id) bb.bb_age size !cnt_used !cnt_prop (size - !cnt_used - !cnt_prop) ) bb_tab; Buffer.contents b
sectionYPositions = computeSectionYPositions($el), 10)"
x-init="setTimeout(() => sectionYPositions = computeSectionYPositions($el), 10)"
>