On Thu, May 12, 2011 at 01:42, Santosh Shilimkar <santosh.shilimkar@xxxxxx> wrote: > On 5/5/2011 12:23 PM, Saquib wrote: >> Can anyone please help me to understand and fix this issue? >> >> When CPU frequency is "1008MHz", duration of delay was close to >> theoretical value, however, when "300MHz", it was close to about 4 times >> the theoretical value. >> >> I tested it on OMAP4(SMP) blaze board. > >> > It's a well known problem if the udelay() is based of global lpj. > You can read more here [1] > > Regards > Santosh > [1] http://eeek.borgchat.net/lists/arm-kernel/msg120702.html I am curious about this topic now. Searching Russel's patchworks for this: http://www.arm.linux.org.uk/developer/patches/search.php?summary=udelay I see nothing queued. What is the recommendation for udelay? Regards, Nishanth Menon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
