From: William Lee Irwin III <wli@holomorphy.com>
To: Rik van Riel <riel@imladris.surriel.com>,
Andrew Morton <akpm@digeo.com>,
"Martin J. Bligh" <mbligh@aracnet.com>,
linux-kernel@vger.kernel.org, lse-tech@lists.sourceforge.net,
dmccr@us.ibm.com
Subject: Re: [Lse-tech] Re: Performance of partial object-based rmap
Date: Fri, 21 Feb 2003 11:27:06 -0800 [thread overview]
Message-ID: <20030221192706.GE10401@holomorphy.com> (raw)
In-Reply-To: <20030221191538.GD10401@holomorphy.com>
On Fri, Feb 21, 2003 at 02:00:10AM -0800, William Lee Irwin III wrote:
>> nr_page_table_pages 689
>> which amounts to 2756KB RAM used for PTE's, demonstrating large
> Pagetables are also grossly fragmented. From the same sample:
> nr_reverse_maps 156027
> To preempt the FAQ, this is the number of reverse mappings performed,
> where one is done for every instantiated non-swap PTE.
ARGH too early in the morning.
$ echo $(( (100*156027.0)/(689*1024) ))
22.11467593432511
percent utilization
or
$ echo $(( 156027.0/689 ))
226.45428156748912
PTE's per pagetable page.
-- wli
next prev parent reply other threads:[~2003-02-21 19:19 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-20 4:25 Performance of partial object-based rmap Martin J. Bligh
2003-02-20 4:47 ` William Lee Irwin III
2003-02-20 5:14 ` Martin J. Bligh
2003-02-20 5:16 ` [Lse-tech] " William Lee Irwin III
2003-02-20 5:27 ` Martin J. Bligh
2003-02-21 1:44 ` Martin J. Bligh
2003-02-21 3:08 ` Andrew Morton
2003-02-21 3:25 ` Rik van Riel
2003-02-21 3:47 ` Andrew Morton
2003-02-21 4:25 ` Rik van Riel
2003-02-21 10:00 ` William Lee Irwin III
2003-02-21 19:15 ` [Lse-tech] " William Lee Irwin III
2003-02-21 19:27 ` William Lee Irwin III [this message]
2003-02-21 3:32 ` Martin J. Bligh
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