From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Chubb Date: Wed, 29 May 2002 05:04:54 +0000 Subject: Re: [Linux-ia64] NTP broken? Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> "David" = David Mosberger writes: >>>>> On Wed, 22 May 2002 13:08:08 +1000, Peter Chubb said: Peter> NTP on Linux 2.4.17/IA64 appears broken. ntpd never seems to Peter> be able to pull the PLL into sync, even after using ntpdate to Peter> set the clock to the correct server time. Peter> What are other peoples' experiences with NTP on IA64? David> I'm not aware of any problems with NTP keeping in sync with David> realtime. OK, I now have two i2000s both running the same kernel, both configured identically. On one of them, NTP pulls into sync within a few minutes. The other just drifts further and further away. One interesting `feature' is that on the one that keeps running away, the CPU clock is detected as 718.793988 MHz not the supposedly correct 733MHz. The boot message says: CPU 0: base freq0.684MHz, ITC ratio/2, ITC freqq8.764MHz My suspicion is that this is incorrect on this machine, and it is *really* at 733MHz --- which would explain the lack of sync (NTP just can't slow the clock down enough) and the runaway time (733/718 is around 1.02; which corresponds to a second a minute) The BIOS reports 733MHz, though. Peter C