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Date: Fri, 13 Dec 2013 19:13:56 -0800
From: Andi Kleen <ak@linux.intel.com>
To: Dave Hansen <dave@sr71.net>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Pravin B Shelar <pshelar@nicira.com>,
        Christoph Lameter <cl@linux-foundation.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [RFC][PATCH 6/7] mm: slub: remove 'struct page' alignment
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> helps performance, presumably because of that 14% fewer
> cacheline effect.  A 30GB dd to a ramfs file:
> 
> 	dd if=/dev/zero of=bigfile bs=$((1<<30)) count=30
> 
> is sped up by about 4.4% in my testing.

Impressive result!

-Andi