Re: [Caml-list] gc overhead

[Julia Lawall <julia.lawall@lip6.fr>]

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On Mon, 11 Dec 2017, Gabriel Scherer wrote:

> There is an instrumentation mode for the OCaml GC whose usage I have described in a blog post and on the caml-list:
>
>   http://prl.ccs.neu.edu/blog/2016/05/24/measuring-gc-latencies-in-haskell-ocaml-racket/
>   https://sympa.inria.fr/sympa/arc/caml-list/2016-05/msg00219.html
>
> (I am realizing that the simple change I proposed, of building the instrumented runtime by default, was forgotten, and will submit a pull request shortly -- hopefully it will be present in 4.07... In the meantime, people have to
> build the compiler with the -with-instrumented-runtime flag explicitly set.)

Thanks for the pointer.

julia

>
> On Mon, Dec 11, 2017 at 7:53 PM, Julia Lawall <julia.lawall@lip6.fr> wrote:
>
>
>       On Tue, 28 Nov 2017, Yawar Amin wrote:
>
>       > Hi Juli, you can take a lookat https://realworldocaml.org/v1/en/html/understanding-the-garbage-collecto
>       > r.html for some explanations of the various knobs. Specifically, the in-text
>       > note sections (marked with the icon of two pages) give some helpful hints.
>       > The first one on the page is 'Setting the Size of the Minor Heap'.
>
>       Is it possible to know when a major GC starts, to be able to measure the
>       time spent?  I saw the verbose flag in the control structure, but that
>       just prints a message.  I don't see how to get the time.
>
>       thanks,
>       julia
>
>       > Regards,
>       >
>       > Yawar
>       >
>       > On Tue, Nov 28, 2017 at 1:11 PM, Julia Lawall <julia.lawall@lip6.fr> wrote:
>       >       Hello,
>       >
>       >       Is there any reasonable way to reduce the amount of garbage
>       >       collection
>       >       activity in an OCaml program?  I see various knobs in the
>       >       control
>       >       structure, but I don't know what the impact of changing the
>       >       values would
>       >       be.
>       >
>       >       thanks,
>       >       juli
>       >
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