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Re: [Xen-devel] [PATCH v4 5/6] build: convert perfc{, _arrays} to Kconfig

> +     bool "Performance Counters"
> +     ---help---
> +       Enables software performance counters that allows you to analyze
> +       bottlenecks in the system. To access this data you must use the
> +       'xenperf' tool.

I would reword this as :

"To access this data you can use serial console to print (and reset) using 'p' 
and 'P'
respectively, or the 'xenperf' tool."

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