Messages in this thread | | | Date | Mon, 5 May 2003 16:25:26 -0400 (EDT) | From | "Richard B. Johnson" <> | Subject | Re: Kernel hot-swap using Kexec, BProc and CC/SMP Clusters. |
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On Mon, 5 May 2003, Steven Cole wrote:
> On Mon, 2003-05-05 at 12:17, Valdis.Kletnieks@vt.edu wrote: > > On Mon, 05 May 2003 12:00:15 MDT, Steven Cole said: > > > > > Perhaps two uptimes could be kept. The current concept of uptime would > > > remain as is, analogous to the reign of a king (the current kernel), and > > > a new integrated uptime would be analogous to the life of a dynasty. The > > > dynasty uptime would be one of the many things the new kernel learned > > > about on booting. This new dynasty uptime could become quite long if > > > everything keeps on ticking. > > > > Make sure you handle the case of a dynasty that starts on a 2.7.13 kernel > > and is finally deposed by a power failure in 2.7.39. > > > 2.7.13 eh? Wow, that's optimistic. I guess Karim and others better get > busy. Unless Linus throws in about 50 kernels with the -preX naming > scheme like this last time. ;) > > Here's nice long uptime: > > tstad% uptime > 12:58pm up 503 days, 1:30, 3 users, load average: 0.23, 0.04, 0.00 > tstad% uname -a > ULTRIX tstad 4.3 1 RISC > > I guess Ultrix didn't have a jiffie wraparound problem at 497 days. > That DEC 5000/200 has run almost continuously for 12 years, except for > the occasional palace revolution/forest fire fiasco. > > Steven
VAXen including Ultrix start a clock at zero when booted. They set boottime to the hwclock with the hard-to-find batteries behind the rear door or under the board in the VAX/Station 3000. So, you don't have a time that started in 1970 like other Unix machines altough a conversion takes place when you actually read the time.
Raw time is in a quadword, in microfortnights (14 days / 1,000,000) = 24 * 14 = 336 hrs/* 60 = 2,160 seconds / 1,000,000 = 0.02 seconds.
Cheers, Dick Johnson Penguin : Linux version 2.4.20 on an i686 machine (797.90 BogoMips). Why is the government concerned about the lunatic fringe? Think about it.
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