Re: SLUB: Increasing partial pages

From: Matthew Wilcox <matthew@xxxxxx>
Date: Wed, 16 Jan 2008 15:16:18 -0700

On Wed, Jan 16, 2008 at 02:01:08PM -0800, Christoph Lameter wrote:

On Wed, 16 Jan 2008, Matthew Wilcox wrote:

I sent you a mail on December 6th ... here are the contents of that
mail:

Dec 6th? I was on vacation then and it seems that I was unable to
reproduce the oopses. Can I get some backtraces or other information
that would allow me to diagnose the problem?

I'll ask to see what they have.

Applying just patches 1-7 and 9 leads to a slight (0.34%) performance
reduction compared to slub. That is 6.45% versus slab, reduces to 6.79%
with the 8 patches applied.

Patch 8 is the one that optimizes the fastpath. How much runtime
variability have these tests?

About 0.1-0.2% 0.3% is considered significant.

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Follow-Ups:
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References:
- SLUB: Increasing partial pages
  - From: Matthew Wilcox
- Re: SLUB: Increasing partial pages
  - From: Christoph Lameter
- Re: SLUB: Increasing partial pages
  - From: Matthew Wilcox
- Re: SLUB: Increasing partial pages
  - From: Christoph Lameter

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