Hi... On 7/11/09, H M Thalib <[email protected]> wrote: > On Sat, 2009-07-11 at 09:18 +0700, Mulyadi Santosa wrote: >> On 7/11/09, H M Thalib <[email protected]> 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. -- regards, Mulyadi Santosa Freelance Linux trainer blog: the-hydra.blogspot.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
