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Date: Thu, 08 Apr 2010 06:59:34 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: "Zhang, Yanmin" <yanmin_zhang@...ux.intel.com> Cc: Christoph Lameter <cl@...ux-foundation.org>, Pekka Enberg <penberg@...helsinki.fi>, netdev <netdev@...r.kernel.org>, Tejun Heo <tj@...nel.org>, alex.shi@...el.com, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Ma, Ling" <ling.ma@...el.com>, "Chen, Tim C" <tim.c.chen@...el.com>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: hackbench regression due to commit 9dfc6e68bfe6e Le jeudi 08 avril 2010 à 09:05 +0800, Zhang, Yanmin a écrit : > > Do we have a user program to check actual L1 cache size of a machine ? > If there is no, it's easy to write it as kernel exports the cache stat by > /sys/devices/system/cpu/cpuXXX/cache/indexXXX/ Yes, this is what advertizes my L1 cache having 64bytes lines, but I would like to check that in practice, this is not 128bytes... ./index0/type:Data ./index0/level:1 ./index0/coherency_line_size:64 ./index0/physical_line_partition:1 ./index0/ways_of_associativity:8 ./index0/number_of_sets:64 ./index0/size:32K ./index0/shared_cpu_map:00000101 ./index0/shared_cpu_list:0,8 ./index1/type:Instruction ./index1/level:1 ./index1/coherency_line_size:64 ./index1/physical_line_partition:1 ./index1/ways_of_associativity:4 ./index1/number_of_sets:128 ./index1/size:32K ./index1/shared_cpu_map:00000101 ./index1/shared_cpu_list:0,8 -- 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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