linux-kernel - Re: SLUB: Support for statistics to help analyze allocator behavior

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Message-ID: <Pine.LNX.4.64.0802051005010.11705@schroedinger.engr.sgi.com>
Date:	Tue, 5 Feb 2008 10:05:52 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Pekka J Enberg <penberg@...helsinki.fi>
cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: SLUB: Support for statistics to help analyze allocator behavior

On Tue, 5 Feb 2008, Pekka J Enberg wrote:

> Hi Christoph,
> 
> On Mon, 4 Feb 2008, Christoph Lameter wrote:
> > The statistics provided here allow the monitoring of allocator behavior
> > at the cost of some (minimal) loss of performance. Counters are placed in
> > SLUB's per cpu data structure that is already written to by other code.
> 
> Looks good but I am wondering if we want to make the statistics per-CPU so 
> that we can see the kmalloc/kfree ping-pong of, for example, hackbench 

We could do that.... Any idea how to display that kind of information 
in a meaningful way. Parameter conventions for slabinfo?

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