Am Do, den 16.09.2004 schrieb Eric Mader um 22:16: > I recently installed FC 2 on the above machine, which has a 3G Pentium 4 > w/ hyperthreading. This machine seems to hang hard after a day or so of hyperthreading is the keyword > running. It's usually just running the screen saver when it hangs. When > it hangs, it won't talk to the keyboard or the network - I have to use > the power button on the case to restart it. > > The kernel seems to treat this machine as if it has two CPUs. Is that > the expected / correct thing for it to do? I'm running the SMP kernel. > I've seen the same problem w/ 2.6.5-1.358smp and 2.6.8-1.521smp. See above, because it is a hyperthreading CPU it is treated as 2 CPUs. It is correct but can too arise problems. > Sep 14 05:23:58 Doramichan kernel: Losing too many ticks! > Sep 14 05:23:58 Doramichan kernel: TSC cannot be used as a timesource. > Sep 14 05:23:58 Doramichan kernel: Possible reasons for this are: > Sep 14 05:23:58 Doramichan kernel: You're running with Speedstep, > Sep 14 05:23:58 Doramichan kernel: You don't have DMA enabled for your > hard disk (see hdparm), > Sep 14 05:23:58 Doramichan kernel: Incorrect TSC synchronization on an > SMP system (see dmesg). > Eric Mader You can first try to find an option in the BIOS of your system to disable the hyperthreading. If not available then try as kernel boot parameter "acpi=noht". To do so press "a" at grub boot screen and enter "3" and then append the above string to the kernel line. All without quotes, I just used them to make the things clearer. Alexander -- Alexander Dalloz | Enger, Germany | GPG key 1024D/ED695653 1999-07-13 Fedora GNU/Linux Core 2 (Tettnang) kernel 2.6.8-1.521smp Serendipity 23:51:29 up 17 days, 21:08, load average: 0.09, 0.39, 0.46
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