linux-kernel - Re: [PATCH 0/4] zsmalloc improvements

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Message-ID: <4FF6FF1F.5090701@linux.vnet.ibm.com>
Date:	Fri, 06 Jul 2012 10:07:11 -0500
From:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
To:	Konrad Rzeszutek Wilk <konrad@...nok.org>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Nitin Gupta <ngupta@...are.org>,
	Minchan Kim <minchan@...nel.org>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] zsmalloc improvements

On 07/04/2012 03:43 PM, Konrad Rzeszutek Wilk wrote:
> On Mon, Jul 02, 2012 at 04:15:48PM -0500, Seth Jennings wrote:
>> This exposed an interesting and unexpected result: in all
>> cases that I tried, copying the objects that span pages instead
>> of using the page table to map them, was _always_ faster.  I could
>> not find a case in which the page table mapping method was faster.
> 
> Which architecture was this under? It sounds x86-ish? Is this on
> Westmere and more modern machines? What about Core2 architecture?
> 
> Oh how did it work on AMD Phenom boxes?

I don't have a Phenom box but I have an Athlon X2 I can try out.
I'll get this information next Monday.

--
Seth

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