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Re: [PATCH] malloc: Deprecate hook variables, __default_morecore, <mcheck.h>

From: DJ Delorie <dj at redhat dot com>
To: Steve Vormwald <sdvormwa at cray dot com>
Cc: libc-alpha at sourceware dot org
Date: Mon, 21 Nov 2016 14:43:32 -0500
Subject: Re: [PATCH] malloc: Deprecate hook variables, __default_morecore, <mcheck.h>
Authentication-results: sourceware.org; auth=none
References: <915065cd-079b-0f7b-eebf-7ca835ca4030@redhat.com> <DM5PR11MB1531F4EF20DDAA6F8DC35DA7BBB00@DM5PR11MB1531.namprd11.prod.outlook.com>

Steve Vormwald <sdvormwa@cray.com> writes:
> The usual culprit is something "caching" small (<128byte) allocations for
> future reuse rather than freeing them when they become unused, which

Have you tried disabling fastbins?  I.e. mallopt(M_MXFAST, 0) ?

References:
- Re: [PATCH] malloc: Deprecate hook variables, __default_morecore, <mcheck.h>
  - From: Florian Weimer
- Re: [PATCH] malloc: Deprecate hook variables, __default_morecore, <mcheck.h>
  - From: Steve Vormwald

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