[ug-bosug] Fwd: [cslug] malloc problem on Solaris

Sun Sep 16 21:27:13 PDT 2007

Sriram Narayanan wrote On 09/14/07 23:05,:

> I lack the experience on such topics. Can someone help him out ?
>
> Vijay: Please join the POSUG list (and perhaps BOSUG as well).
>
>
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> -- Sriram
>
> ---------- Forwarded message ----------
> From: * vijay das* <lovingvijay2002 at yahoo.com
> <mailto:lovingvijay2002 at yahoo.com>>
> Date: Sep 14, 2007 12:07 PM
> Subject: [cslug] malloc problem on Solaris
> To: cslug at yahoogroups.com <mailto:cslug at yahoogroups.com>
>
> Hi friends , i know its a Linux group but still if
> anybody has any idea
>
> The default Sun Solaris malloc library is generally
> considered inefficient.
> For high scalability and high performance, it is best
> to use 3rd party memory manager library. For example,
> I have simple/pure C/C++ program
>
> 1. Allocates, say 512 MB memory.
> 2. Free the memory allocated in step 1.
> 3. Allocate, memory in step1 + 10MB.
> 4. Free the memory in step 3.
>
> If I use 'pmap' to watch the meomory *after* step 2
> and step 4, it still says that much memory is still in
> use by the process. If I used Hoard memory library,
> for example, the 'pmap' output after step2 and step4
> drops down to original values.
>
> The Hoard memory library (http://www.hoard.org) has
> some quirks, the 'ps'
> command doesn't work, for example, complains that 'ps'
> is wrong ELF format.
>
> which 3rd party memory manager is best for Solaris
> platform? Does any body have any experiences with
> alternate memory manager on Solaris?
>
> thanks
> Vijay
>
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Besides libumem suggested by Binu, you may also want to conduct your
tests with libmtmalloc.so
[libmtmalloc(3LIB)]. This beats hoard for quite a few workloads.
-surya