[webkit-dev] bmalloc design question about relation with std malloc

Yusuke SUZUKI utatane.tea at gmail.com
Wed May 2 18:24:03 PDT 2018


Thanks, it sounds reasonable :)

On Tue, May 1, 2018 at 1:47 Geoffrey Garen <ggaren at apple.com> wrote:

> If we have just a few allocations, we should use the mmap based allocator.
> This preserves the invariant that bmalloc can be used as a general-purpose
> malloc implementation.
>
> If we have lots of small allocations, we should probably reconsider the
> design.
>
> I’m not familiar with the new uses of std::vector inside bmalloc. That’s
> not something I would recommend.
>
> Geoff
>
> > On Apr 30, 2018, at 3:35 AM, Yusuke SUZUKI <utatane.tea at gmail.com>
> wrote:
> >
> > Hi, WebKittens,
> >
> > IIRC, bmalloc uses mmap based page allocator for internal memory use.
> For example, bmalloc::Vector uses it instead of calling malloc.
> > But recent changes start using std::vector, which means it uses std
> malloc under the hood.
> >
> > So my question is, if we want some internal memory allocation in
> bmalloc, shoud we use std::malloc? Or should we use mmap based allocator?
> >
> > Best regards,
> > Yusuke Suzuki
> > --
> > Regards,
> > Yusuke Suzuki
> > _______________________________________________
> > webkit-dev mailing list
> > webkit-dev at lists.webkit.org
> > https://lists.webkit.org/mailman/listinfo/webkit-dev
>
>
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