From: William Lee Irwin III <wli@holomorphy.com>
To: "Martin J. Bligh" <fletch@aracnet.com>
Cc: Andrew Morton <akpm@digeo.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: kernbench-16 on 2.5.59 vs 2.5.59-mm6
Date: Mon, 27 Jan 2003 16:22:18 -0800 [thread overview]
Message-ID: <20030128002218.GE780@holomorphy.com> (raw)
In-Reply-To: <375110000.1043689012@titus>
On Mon, Jan 27, 2003 at 09:36:52AM -0800, Martin J. Bligh wrote:
> 132 clear_page_tables
> 131 pgd_ctor
> -413 pgd_alloc
The pagetable preconstruction cache hit is spread across
clear_page_tables() and pgd_ctor() with the pgd_ctor patches.
This is the equivalent of the explicit zeroing in pgd_alloc().
Your result appears to imply the overhead has been reduced by 36%,
which is useful evidence for the PAE case. Before this the pgd_alloc()
overhead had only been observed on non-PAE systems.
Now, YTF hadn't I seen this before if all it took to bring it out was
a kernel compile? Perhaps diffprof (I prefer the multiplicative flavor
but nm that) of some flavor was lacking.
-- wli
next prev parent reply other threads:[~2003-01-28 0:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-27 17:36 kernbench-16 on 2.5.59 vs 2.5.59-mm6 Martin J. Bligh
2003-01-28 0:22 ` William Lee Irwin III [this message]
[not found] <20030127174015$5cfa@gated-at.bofh.it>
2003-01-27 18:48 ` Dipankar Sarma
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