* [Caml-list] Size limitation on input_value
@ 2004-07-22 19:41 Yaron Minsky
2004-07-26 16:48 ` [Caml-list] " Yaron Minsky
0 siblings, 1 reply; 6+ messages in thread
From: Yaron Minsky @ 2004-07-22 19:41 UTC (permalink / raw)
To: Caml Mailing List
It seems that there is a size limitation on input_value that was not
there before 3.08. Basically, I can't load things larger than the
maximum string size. Is this a bug? Has anyone else hit this?
Yaron
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Caml-list] Re: Size limitation on input_value
2004-07-22 19:41 [Caml-list] Size limitation on input_value Yaron Minsky
@ 2004-07-26 16:48 ` Yaron Minsky
2004-07-26 17:12 ` Xavier Leroy
0 siblings, 1 reply; 6+ messages in thread
From: Yaron Minsky @ 2004-07-26 16:48 UTC (permalink / raw)
To: Caml Mailing List
So, I've investigated this a little further, and it's a definite
regression. Here's the function I used:
# let run ~save ~load n =
let ar = Array.init n (fun i -> (i,i+1,i+2,i+3)) in
if save then begin
let f = open_out_bin "foo.val" in
output_value f ar;
close_out f
end;
if load then begin
let f = open_in_bin "foo.val" in
ignore (input_value f);
close_in f
end;;
val run : save:bool -> load:bool -> int -> unit = <fun>
If I run this on 3.07, i get this:
# run ~save:true ~load:true 1000000;;
- : unit = ()
On 3.08, I get this:
# run ~save:true ~load:true 1000000;;
Out of memory during evaluation.
# run ~save:true ~load:false 1000000;;
Out of memory during evaluation.
# run ~save:false ~load:false 1000000;;
- : unit = ()
#
So, the exception comes when saving, not when generating the data.
Is this a known bug? Are there any patches available?
y
On Thu, 22 Jul 2004 15:41:44 -0400, Yaron Minsky <yminsky@gmail.com> wrote:
> It seems that there is a size limitation on input_value that was not
> there before 3.08. Basically, I can't load things larger than the
> maximum string size. Is this a bug? Has anyone else hit this?
>
> Yaron
>
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [Caml-list] Re: Size limitation on input_value
2004-07-26 16:48 ` [Caml-list] " Yaron Minsky
@ 2004-07-26 17:12 ` Xavier Leroy
2004-07-26 18:14 ` Yaron Minsky
0 siblings, 1 reply; 6+ messages in thread
From: Xavier Leroy @ 2004-07-26 17:12 UTC (permalink / raw)
To: yminsky; +Cc: Caml Mailing List
> So, I've investigated this a little further, and it's a definite
> regression. Here's the function I used:
> [...]
> On 3.08, I get this:
> # run ~save:true ~load:true 1000000;;
> Out of memory during evaluation.
> # run ~save:true ~load:false 1000000;;
> Out of memory during evaluation.
> # run ~save:false ~load:false 1000000;;
> - : unit = ()
I cannot reproduce this behavior with 3.08 here. All three phrases
evaluate without Out_of_memory conditions.
There have been no significant changes in the code for output_value
and input_value between 3.07 and 3.08.
Could you investigate some more where the Out_of_memory comes from?
strace and OCAMLRUNPARAM='v=63' could give useful clues.
Please use caml@inria.fr or caml-bugs@inria.fr to continue this discussion.
- Xavier Leroy
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Caml-list] Re: Size limitation on input_value
2004-07-26 17:12 ` Xavier Leroy
@ 2004-07-26 18:14 ` Yaron Minsky
2004-07-27 7:41 ` Xavier Leroy
0 siblings, 1 reply; 6+ messages in thread
From: Yaron Minsky @ 2004-07-26 18:14 UTC (permalink / raw)
To: Xavier Leroy; +Cc: Caml Mailing List
[-- Attachment #1: Type: text/plain, Size: 1338 bytes --]
Interesting. I can't replicate this on a stock ocaml toplevel. It
does occur, however, on a toplevel with vmthreads compiled in. I've
attached the file foo.ml, as well as the output file with the
appropriate OCAMLRUNPARAM value.
I created the toplevel with this command:
ocamlfind ocamlmktop -linkpkg -package threads -vmthread -o foocaml
And then I got the error by running the command "./foocaml foo.ml".
y
On Mon, 26 Jul 2004 19:12:05 +0200, Xavier Leroy <xavier.leroy@inria.fr> wrote:
> > So, I've investigated this a little further, and it's a definite
> > regression. Here's the function I used:
> > [...]
> > On 3.08, I get this:
> > # run ~save:true ~load:true 1000000;;
> > Out of memory during evaluation.
> > # run ~save:true ~load:false 1000000;;
> > Out of memory during evaluation.
> > # run ~save:false ~load:false 1000000;;
> > - : unit = ()
>
> I cannot reproduce this behavior with 3.08 here. All three phrases
> evaluate without Out_of_memory conditions.
>
> There have been no significant changes in the code for output_value
> and input_value between 3.07 and 3.08.
>
> Could you investigate some more where the Out_of_memory comes from?
> strace and OCAMLRUNPARAM='v=63' could give useful clues.
>
> Please use caml@inria.fr or caml-bugs@inria.fr to continue this discussion.
>
> - Xavier Leroy
>
[-- Attachment #2: foo.ml --]
[-- Type: application/octet-stream, Size: 338 bytes --]
let run ~save ~load n =
let ar = Array.init n (fun i -> (i,i+1,i+2,i+3)) in
if save then begin
let f = open_out_bin "foo.val" in
output_value f ar;
close_out f
end;
if load then begin
let f = open_in_bin "foo.val" in
ignore (input_value f);
close_in f
end
let () = run ~save:true ~load:true 1000000;;
[-- Attachment #3: attach.txt --]
[-- Type: text/plain, Size: 14139 bytes --]
[14:12:13 yminsky@quant2 scanner]$ ./foocaml foo.ml
Initial minor heap size: 128k bytes
Initial major heap size: 240k bytes
Initial space overhead: 80%
Initial max overhead: 500%
Initial heap increment: 240k bytes
Initial stack limit: 1024k bytes
<>Starting new major GC cycle
!<Growing heap to 480k bytes
Growing page table to 352 entries
>$<>Starting new major GC cycle
Growing gray_vals to 16k bytes
!<>$Growing global data to 3072 entries
<>$Growing heap to 4388k bytes
Growing page table to 1331 entries
Starting new major GC cycle
!ref_table threshold crossed
<Growing heap to 4628k bytes
Growing page table to 1393 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>Starting new major GC cycle
Growing gray_vals to 32k bytes
Growing gray_vals to 64k bytes
!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 4868k bytes
Growing page table to 1455 entries
>!ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 5108k bytes
Growing page table to 1517 entries
>Starting new major GC cycle
Growing gray_vals to 128k bytes
Growing gray_vals to 256k bytes
!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 5348k bytes
Growing page table to 1677 entries
>!ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 5588k bytes
Growing page table to 1739 entries
>$ref_table threshold crossed
<>Starting new major GC cycle
!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 5828k bytes
Growing page table to 1801 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 6068k bytes
Growing page table to 1863 entries
>!ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 6308k bytes
Growing page table to 1925 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 6548k bytes
Growing page table to 1987 entries
>Starting new major GC cycle
!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 6788k bytes
Growing page table to 2049 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 7028k bytes
Growing page table to 2111 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 7268k bytes
Growing page table to 2173 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 7508k bytes
Growing page table to 2235 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 7748k bytes
Growing page table to 2297 entries
>Starting new major GC cycle
!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 7988k bytes
Growing page table to 2359 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 8228k bytes
Growing page table to 2421 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 8468k bytes
Growing page table to 2483 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 8708k bytes
Growing page table to 2545 entries
>!ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 8948k bytes
Growing page table to 2607 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 9188k bytes
Growing page table to 2669 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 9428k bytes
Growing page table to 2731 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>Starting new major GC cycle
Growing gray_vals to 512k bytes
!ref_table threshold crossed
<Growing heap to 9668k bytes
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 9908k bytes
Growing page table to 2922 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 10148k bytes
Growing page table to 2984 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 10388k bytes
Growing page table to 3046 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 10628k bytes
Growing page table to 3108 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 10868k bytes
Growing page table to 3170 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 11108k bytes
Growing page table to 3232 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 11348k bytes
Growing page table to 3294 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 11588k bytes
Growing page table to 3356 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 11828k bytes
Growing page table to 3418 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 12068k bytes
Growing page table to 3480 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>Starting new major GC cycle
!ref_table threshold crossed
<Growing heap to 12308k bytes
Growing page table to 3542 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 12548k bytes
Growing page table to 3604 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 12788k bytes
Growing page table to 3666 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 13028k bytes
Growing page table to 3728 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 13268k bytes
Growing page table to 3790 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 13508k bytes
Growing page table to 3852 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 13748k bytes
Growing page table to 3914 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 13988k bytes
Growing page table to 3976 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 14228k bytes
Growing page table to 4038 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 14468k bytes
Growing page table to 4100 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 14708k bytes
Growing page table to 4162 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 14948k bytes
Growing page table to 4224 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 15188k bytes
Growing page table to 4286 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 15428k bytes
Growing page table to 4348 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 15668k bytes
Growing page table to 4410 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 15908k bytes
Growing page table to 4472 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>Starting new major GC cycle
!ref_table threshold crossed
<Growing heap to 16148k bytes
Growing page table to 4534 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 16388k bytes
Growing page table to 4596 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 16628k bytes
Growing page table to 4658 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 16868k bytes
Growing page table to 4720 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 17108k bytes
Growing page table to 4782 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 17348k bytes
Growing page table to 4844 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 17588k bytes
Growing page table to 4906 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 17828k bytes
Growing page table to 4968 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 18068k bytes
Growing page table to 5030 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 18308k bytes
Growing page table to 5092 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 18548k bytes
Growing page table to 5154 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 18788k bytes
Growing page table to 5216 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 19028k bytes
Growing page table to 5278 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 19268k bytes
Growing page table to 5340 entries
>!ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 19508k bytes
Growing page table to 5402 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 19748k bytes
Growing page table to 5464 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 19988k bytes
Growing page table to 5526 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 20228k bytes
Growing page table to 5588 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 20468k bytes
Growing page table to 5650 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 20708k bytes
Growing page table to 5712 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 20948k bytes
Growing page table to 5774 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 21188k bytes
Growing page table to 5836 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 21428k bytes
Growing page table to 5898 entries
>$ref_table threshold crossed
<>$ref_table threshold crossed
<>$ref_table threshold crossed
<Growing heap to 21668k bytes
Growing page table to 5960 entries
>Starting new major GC cycle
Growing gray_vals to 1024k bytes
!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 21908k bytes
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 22148k bytes
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 22388k bytes
Growing page table to 6279 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 22628k bytes
Growing page table to 6341 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 22868k bytes
Growing page table to 6403 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 23108k bytes
Growing page table to 6465 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 23348k bytes
Growing page table to 6527 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 23588k bytes
Growing page table to 6589 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!ref_table threshold crossed
<Growing heap to 23828k bytes
Growing page table to 6651 entries
>!ref_table threshold crossed
<>!ref_table threshold crossed
<>!Out of memory during evaluation.
<Growing heap to 24068k bytes
Growing page table to 7296 entries
>!
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [Caml-list] Re: Size limitation on input_value
2004-07-26 18:14 ` Yaron Minsky
@ 2004-07-27 7:41 ` Xavier Leroy
2004-07-27 12:04 ` Yaron Minsky
0 siblings, 1 reply; 6+ messages in thread
From: Xavier Leroy @ 2004-07-27 7:41 UTC (permalink / raw)
To: yminsky; +Cc: Caml Mailing List
> Interesting. I can't replicate this on a stock ocaml toplevel. It
> does occur, however, on a toplevel with vmthreads compiled in.
Ah, you should have said that earlier. With vmthreads, input_value
and output_value go through an intermediate buffer which is a Caml string
(this is required because vmthreads must avoid blocking I/O system
calls, hence all I/O must be performed at the Caml level). So, the
size of the data written by output_value or read by input_value is
limited by the maximal length of a Caml string.
This limitation of vmthreads isn't new in 3.08, it's been present from
the beginning.
- Xavier Leroy
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Caml-list] Re: Size limitation on input_value
2004-07-27 7:41 ` Xavier Leroy
@ 2004-07-27 12:04 ` Yaron Minsky
0 siblings, 0 replies; 6+ messages in thread
From: Yaron Minsky @ 2004-07-27 12:04 UTC (permalink / raw)
To: Xavier Leroy; +Cc: Caml Mailing List
My apologies. I only realized that we'd added the -vmthread flag
after you pointed out that you couldn't reproduce the problem.
Thanks,
Yaron
On Tue, 27 Jul 2004 09:41:19 +0200, Xavier Leroy <xavier.leroy@inria.fr> wrote:
> > Interesting. I can't replicate this on a stock ocaml toplevel. It
> > does occur, however, on a toplevel with vmthreads compiled in.
>
> Ah, you should have said that earlier. With vmthreads, input_value
> and output_value go through an intermediate buffer which is a Caml string
> (this is required because vmthreads must avoid blocking I/O system
> calls, hence all I/O must be performed at the Caml level). So, the
> size of the data written by output_value or read by input_value is
> limited by the maximal length of a Caml string.
>
> This limitation of vmthreads isn't new in 3.08, it's been present from
> the beginning.
>
> - Xavier Leroy
>
-------------------
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^ permalink raw reply [flat|nested] 6+ messages in thread
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