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Message-Id: <1245709239.25547.394.camel@macbook.infradead.org> Date: Mon, 22 Jun 2009 23:20:39 +0100 From: David Woodhouse <dwmw2@...radead.org> To: Jörn Engel <joern@...fs.org> Cc: Chris Simmonds <chris@...t.co.uk>, Arnd Bergmann <arnd@...db.de>, Marco <marco.stornelli@...il.com>, Sam Ravnborg <sam@...nborg.org>, Linux FS Devel <linux-fsdevel@...r.kernel.org>, Linux Embedded <linux-embedded@...r.kernel.org>, Linux Kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 06/14] Pramfs: Include files On Mon, 2009-06-22 at 23:41 +0200, Jörn Engel wrote: > Four loops doing the same increment with different data types: long, > u64, we32 (wrong-endian) and we64. Compile with _no_ optimizations. That's a bit of a poor test then. Especially on architectures with a load-and-swap instruction where it really shouldn't be any slower at all. (Although since GCC doesn't have an __attribute__((littleendian)) I'm not entirely sure how to entice it into _using_ said instruction for the purpose of the test... I think the kernel does manage somehow though, if you get the sources _just_ right.) -- David Woodhouse Open Source Technology Centre David.Woodhouse@...el.com Intel Corporation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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