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Message-ID: <p733b7rdsut.fsf@bingen.suse.de> Date: 08 Dec 2006 03:27:54 +0100 From: Andi Kleen <ak@...e.de> To: "Chen, Kenneth W" <kenneth.w.chen@...el.com> Cc: "linux-kernel" <linux-kernel@...r.kernel.org> Subject: Re: [patch] speed up single bio_vec allocation "Chen, Kenneth W" <kenneth.w.chen@...el.com> writes: > > I tried to use cache_line_size() to find out the alignment of struct bio, but > stumbled on that it is a runtime function for x86_64. It's a single global variable access: #define cache_line_size() (boot_cpu_data.x86_cache_alignment) Or do you mean it caused cache misses? boot_cpu_data is cache aligned and practically read only, so there shouldn't be any false sharing at least. -Andi - 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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