On Sat, 2009-07-11 at 09:59 +0700, Mulyadi Santosa wrote: > Hi... > > On 7/11/09, H M Thalib <hmthalib@xxxxxxxxx> wrote: > > On Sat, 2009-07-11 at 09:18 +0700, Mulyadi Santosa wrote: > >> On 7/11/09, H M Thalib <hmthalib@xxxxxxxxx> wrote: > >> > Hi, > >> > > >> > When I dmesg in my ubuntu machine it gave a time stamp in front of the > >> > printk's. I want to know how to enable this in powerpc and arm based > >> > board for optimization. The sample dmesg log is below. > >> > > >> > [18142.277611] wlan0: associated > >> > [18409.007121] hda-intel: IRQ timing workaround is activated for card > >> > #0. Suggest a bigger bdl_pos_adj. > >> > >> I think you should enable CONFIG_PRINTK_TIME, but I am not sure if > >> that's available on every architecture. > >> > > > > I thaught it was oprofile oprofiler. Thanks for the infromation. > > > > Can I rely on this time stamps to optimize the booting time of the > > kernel. > > IMO yes. AFAIK, whenever possible, it grabs the timing from TSC, so > it's quite fine grained. Even bootchart used to optimize linux boot > process depends on such procedure IIRC. Currently I am involved in optimzion the bootime for kenel I would like to know if there is any other tools that can be used or methods used for optimzing the kerenl. Thanks -- H M Thalib -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
