Date: Sun, 28 Jun 1998 12:42:31 +0200 (SAT) From: John Hay <jhay@mikom.csir.co.za> To: freebsd-smp@FreeBSD.ORG Subject: time problem? Message-ID: <199806281042.MAA04522@zibbi.mikom.csir.co.za>
next in thread | raw e-mail | index | archive | help
Hi, I have found that my dual P5 100MHz machine will gain +- 0.85 seconds every now and again. I haven't been able to find out if there is a pattern yet. It seems to happen within a second or so, so it isn't that it slowly drifts. It happens on average a few times per day, but I have seen days where it hasn't happened at all. I first started to notice it in ntpd's logs, but I have since stopped using ntpd, to make sure that it isn't something that was induced by ntpd. I have also tried a non SMP kernel (with a hack to force it to also use 8254 for its time) and it does not seem to happen then, so it looks like it has something to do with the SMP code. It also does not seem to have anything to do with how busy the machine is, it has happened on a totally idle machine and also during a make world. Anybody have any ideas how I can look for this? I don't understand all the low level time stuff yet (especially the SMP side of it), but if given a little direction I'm willing to try a few things. John -- John Hay -- John.Hay@mikom.csir.co.za To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199806281042.MAA04522>