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Keir Fraser
6df92ebc30
Two enhancements are made in this patch: 1. Make cpuid in command line optional: if user does not provide cpuid, xenpm will operate on all the CPUs. this will easy the xenpm usage. e.g. to set the cpufreq governor, user usually want to set the governor on all CPUs. User can accomplish this easily with this enhancement. 2. Add another option "xenpm start" to calculate the Cx/Px state residency percentage during specified period. when user issue "xenpm start", xenpm will start to record the Cx/Px state residency. when user issue CTRL-C, xenpm will stop and show the Cx/Px state residency and percentage of this period. this is helpful to measure the xenpm effect for speficied workload. Signed-off-by: Guanqun Lu <guanqun.lu@intel.com>Signed-off-by: Ke Yu <ke.yu@intel.com>