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Re: Change glibc malloc behavior: X86 and MIPS

From: Daniel Jacobowitz <drow at false dot org>
To: Bin Chen <binary dot chen at gmail dot com>
Cc: libc-alpha at sources dot redhat dot com
Date: Mon, 11 Feb 2008 08:21:59 -0500
Subject: Re: Change glibc malloc behavior: X86 and MIPS
References: <1111f673-8f89-47c3-b896-d596c31275e2@n20g2000hsh.googlegroups.com>

On Sun, Feb 10, 2008 at 06:48:45PM -0800, Bin Chen wrote:
> You can see in MIPS the three malloc() invoke three times brk() which
> a small space add so the performance is bad, but in X86 the brk() in
> first time is large enough so the succeeding malloc didn't need to
> call brk() again. So my question is how to make MIPS glibc's malloc()
> behaviour the same as in X86, need to recomplile the glibc or just a
> environment var is enough?

This should happen on all platforms.  Are the glibc versions the same?
Check M_TOP_PAD using mallopt.

-- 
Daniel Jacobowitz
CodeSourcery

References:
- Change glibc malloc behavior: X86 and MIPS
  - From: Bin Chen

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