On Wed, Jul 6, 2011 at 12:47 AM, Zheng Da <[email protected]> wrote: > Hello > > Can we profile the kernel during its initialization? perf is > initialized in an early stage in start_kernel(), but it seems there > are no command-line parameters to enable it. > Does anyone have any ideas how to profile the kernel during its > initialization (before user space programs start to run)? I think > someone should have the similar problem as me, and there should be > some solutions. > > Thanks, > Da > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >
Hi Da, Have a look at ftrace. It could be used to profile initcalls. Just add following boot options: initcall_debug, ftrace=initcall More details on http://www.omappedia.org/wiki/Installing_and_Using_Ftrace#Boot_Tracer _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
