[llvm-dev] Hitting kMaxNumChunks

[Kostya Serebryany via llvm-dev]

On Wed, Jan 24, 2018 at 12:10 PM, Frederik Deweerdt <
frederik.deweerdt at gmail.com> wrote:

> On Wed, Jan 24, 2018 at 11:30 AM, Kostya Serebryany <kcc at google.com>
> wrote:
> > +Aleksey, who has been dealing with the allocator recently.
> >
> > If you have a "((idx)) < ((kMaxNumChunks))" (0x40000, 0x40000)
> > check failure, it means that you've allocated (and did not deallocate)
> 2^18
> > large heap regions, each *at least* (2^17+1) bytes.
> > This means, that you have live large heap chunks of 2^35 bytes (or more)
> in
> > total, which is 32Gb.
> > Does this sound correct?
> Yes, it does. Our software typically allocates several hundred Gb, and
> the size of the objects depend on the traffic. They would
> realistically reach 2^17+1 bytes.
>
> > If yes, yea, I guess we need to bump kMaxNumChunks
> >
> >
> I'll increase the limit to 2^19 for our build, and I'll report the results
> here.
>

Yes, please do. Thanks!


>
> Thanks,
> Frederik
>
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