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Date: Fri, 30 Mar 2007 07:39:37 -0800 From: Stephane Eranian <eranian@....hp.com> To: linux-kernel@...r.kernel.org Cc: perfmon@...ali.hpl.hp.com, Stephane Eranian <eranian@....hp.com> Subject: exposing FSB clock speed in /sys Hello, It seems that the kernel does not expose the Front-Side Bus (FSN) Clock speed to user applications. I found code in the kernel dealing with frequency scaling that extracts the information for x86 processors but the value is never exposed. Knowledge the the FSB speed is very useful to monitoring tools. It is used to compute certain bus-related metrics. Looking at the code, it seems that there is no standard way of extracting the FSB speed. For each processor model, you have different MSRs. I would think that the routines in the cpufreq code could be moved out and used as the basis to expose the information somewhere in /sys. Any comments? -- -Stephane - 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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