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Message-ID: <0000013ab7de641e-c975be0c-e85b-4705-8f02-e25b2d4a0ac2-000000@email.amazonses.com> Date: Wed, 31 Oct 2012 17:28:56 +0000 From: Christoph Lameter <cl@...ux.com> To: Shan Wei <shanwei88@...il.com> cc: David Miller <davem@...emloft.net>, NetDev <netdev@...r.kernel.org>, Kernel-Maillist <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 0/9] use this_cpu_ptr instead of per_cpu_ptr(p, smp_processor_id()) On Wed, 31 Oct 2012, Shan Wei wrote: > this_cpu_ptr is faster than per_cpu_ptr(p, smp_processor_id()). > The latter helper needs to find the offset for current cpu, > and needs more assembler instructions which objdump shows in following. The code is shorter and that helps but note that the main effect is that memory accesses are reduced. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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