On 08/11/2012 14:28, "Ian Campbell" <i...@hellion.org.uk> wrote:
>>> There appears to be a certain amount of hardware-specificness to the >>> issue -- so I'm wondering if maybe there are some platforms whose tsc is >>> not as monotonically increasing as it needs to be... >> >> plt_* timestamps are not derived from TSC at all. > > I see, rather it is derived from the platform_timesource which could be > HPET, pmtimer, pit etc but in this case (according to the provided xm > dmesg) appears to be a 14MHz HPET. > > So I guess s/tsc/HPET/ in my original thought... In fact plt_now and plt_wrap are both derived from the same value of plt_stamp64. One is derived from it directly, and the other from plt_stamp64+plt_mask+1 (== plt_stamp64+(1<<32)). -- Keir -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
