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Date: Sun, 2 Dec 2012 21:25:06 +0800 From: Ling Ma <ling.ma.program@...il.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org> Subject: Re: [PATCH RFC] [INET]: Get cirtical word in first 64bit of cache line Hi Eric, Attached benchmark test-cwf.c(cc -o test-cwf test-cwf.c), the result shows when last level cache(LLC) miss and CPU fetches data from memory, critical word as first 64bit member in cache line has better performance(costs 158290336 cycles ) than other positions(offset 0x10, costs 164100732 ) in cache line, the performance is improved by 3.6% in this case. cpu-info is also involved too. Thanks Ling View attachment "test-cwf.c" of type "text/x-csrc" (1986 bytes) Download attachment "cpu-info" of type "application/octet-stream" (7050 bytes)
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