Hi, Steven, We are working on parallelizing secondary CPU bootup. So we need to measure the bootup time of secondary CPU, that is, measure time spent in smp_init() and its callees. But we found that ftrace now doesn't support measure time spent in smp_init() because it is called too early (before core_initcall()?). So, do you think it is possible to use ftrace to measure secondary CPU bootup time?
Thanks, Huang, Ying
