On Mon, Jun 18, 2018 at 7:46 PM, Todd Poynor <toddpoy...@gmail.com> wrote: > From: Todd Poynor <toddpoy...@google.com> > > Add initcall_debug logs for the amount of time taken by each OF platform > bus device create call. For example: > > of platform device create /reserved-memory/ramoops@a3800000 took > 3255 usecs > > initcall_debug already reports the total of all such device creates > as a single entry for function of_platform_default_populate_init (or > similar, depending on the board). The new logs help identify which of > the potentially hundreds of device inits take significant amounts of > time.
It's really the probe time that matters here. Outside of that, creating the devices should be fairly constant time. So why not add timing around non bus specific probe code (driver_probe_device) instead of adding this in multiple places. Then you can remove the timing from deferred probe code. Rob
