From: Arjan van de Ven <arjan@infradead.org>
To: Steve Snyder <swsnyder@insightbb.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Testing optimize-for-size suitability?
Date: Sun, 16 Jan 2005 16:46:43 +0100 [thread overview]
Message-ID: <1105890403.8734.20.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <200501161040.12907.swsnyder@insightbb.com>
On Sun, 2005-01-16 at 10:40 -0500, Steve Snyder wrote:
> Is there a benchmark or set of benchmarks that would allow me to test the
> suitability of the CONFIG_CC_OPTIMIZE_FOR_SIZE kernel config option?
>
> It seems to me that the benefit of this option is very dependant on the
> amount of CPU cache installed, with the compiler code generation being a
> secondary factor. The use, or not, of CONFIG_CC_OPTIMIZE_FOR_SIZE is
> basically an act of faith without knowing how it impacts my particular
> environment.
>
> I've got a Pentium4 CPU with 512KB of L2 cache, and I'm using GCC v3.3.3.
> How can I determine whether or not CONFIG_CC_OPTIMIZE_FOR_SIZE should be
> used for my system?
it also saves 400 kb of memory that can be used by the pagecache now...
that doesn't show in a microbenchmark but it's a quite sizable gain if
you remember that a disk seek is 10msec..that is a LOT of cpu cycles..
next prev parent reply other threads:[~2005-01-16 15:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-16 15:40 Steve Snyder
2005-01-16 15:46 ` Arjan van de Ven [this message]
2005-01-16 20:18 ` Rogério Brito
2005-01-19 4:17 ` Adrian Bunk
2005-01-19 5:14 ` Willy Tarreau
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