hi guys, As tegra3 is using vSMP (Variable Symmetric Multiprocessing) arch, there are 4 high-performance(G) cores and one low-power(LP) core. At runtime, both cpu dynamic hotplug and dynamic LP/G swith are used in a real tegra3 product as a DVFS way to save power. kernel log in EeePad: *cpu dynamic hotplug* <4>[104626.426957] CPU1: Booted secondary processor <7>[104627.427412] tegra CPU: force EDP limit 720000 kHz <4>[104627.427670] CPU2: Booted secondary processor <4>[104628.537005] stop_machine_cpu_stop cpu=0 <4>[104628.537017] stop_machine_cpu_stop cpu=2 <4>[104628.537059] stop_machine_cpu_stop cpu=1 <4>[104628.537702] __stop_cpus: wait_for_completion_timeout+ <4>[104628.537810] __stop_cpus: smp=0 done.executed=1 done.ret =0- <5>[104628.537960] CPU1: clean shutdown <4>[104630.537092] stop_machine_cpu_stop cpu=0 <4>[104630.537172] stop_machine_cpu_stop cpu=2 <4>[104630.537739] __stop_cpus: wait_for_completion_timeout+ <4>[104630.538060] __stop_cpus: smp=0 done.executed=1 done.ret =0- <5>[104630.538203] CPU2: clean shutdown <4>[104631.306984] tegra_watchdog_touch *G<->LP switch* <3>[104666.799152] LP=>G: prolog 22 us, switch 2129 us, epilog 24 us, total 2175 us <3>[104667.807273] G=>LP: prolog 18 us, switch 157 us, epilog 25 us, total 200 us <4>[104671.407008] tegra_watchdog_touch <4>[104671.408816] nct1008_get_temp: ret temp=35C <3>[104671.939060] LP=>G: prolog 17 us, switch 2127 us, epilog 22 us, total 2166 us <3>[104672.938091] G=>LP: prolog 18 us, switch 156 us, epilog 24 us, total 198 us Related codes don't exist in both http://nv-tegra.nvidia.com/gitweb and kernel org, any people know the address to locate these kernel source codes? Thanks barry -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
