On Mar 11, 2010, at 3:08 PM, Alexander Leidinger wrote: >>> Borja, can you confirm that the CPU is correctly announced in FreeBSD (just >>> look at "dmesg | grep CPU:" output, if it tells you it is a AMD or Intel >>> XXX CPU it is correctly detected by the BIOS)? >> >> A CPU bug? Weird. Very. > > It depends. CPUs have bugs. You do not want to run any modern CPU without an > microcode update. The BIOS is doing it for you at system start. > > I do not want to say that this is the problem you have, I just want to point > out that it may be possible (but see below). I got hit by this last december > and I was finding the solution (replacing the complete system, as only > replacing the CPU was not an option) in January.
Of course CPUs have bugs, I don't doubt it. I was just wondering how I coud reproduce the problem with a different hardware :) That's why I said it was unlikely. Besides, such a low level fault should produce many more problems than such a well defined failure mode, as far as I know. >> As the servers had to be rolled into production, and such tests with real >> servers can be quite time consuming, I set up a couple of FreeBSD virtual >> machines, using VMWare Fusion (version 2 then, now version 3) on a Macbook >> (Macbook 4,1 Intel Core2Duo, 2.1 GHz) and tried to reproduce it. > >> Timecounter "i8254" frequency 1193182 Hz quality 0 >> CPU: Intel(R) Xeon(R) CPU L5420 @ 2.50GHz (2496.25-MHz K8-class >> CPU) >> Origin = "GenuineIntel" Id = 0x1067a Stepping = 10 > >> The virtual machine (VMWare Fusion 3.0.0, Macbook, Mac OS X 10.6.2) reports >> this: >> Timecounter "i8254" frequency 1193182 Hz quality 0 >> CPU: Intel(R) Core(TM)2 Duo CPU T8100 @ 2.10GHz (2116.62-MHz K8-class >> CPU) >> Origin = "GenuineIntel" Id = 0x10676 Stepping = 6 > > Summary: you confirmed the problem on a different kind of CPU. > > Because of this it makes it even more unlikely that it is a CPU problem. Indeed :) Borja. > > Bye, > Alexander. > > -- > A good plan today is better than a perfect plan tomorrow. > -- Patton > > http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 > http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137 _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"