SuSE9.2 - kernel: Losing some ticks...checking if CPU frequency changed.
Hello List, i have a K7S8X ASROCK motherboard, 256MB ram and an AMD Duron 1.6Ghz. When i try to install suse9.2 from a FTP-DVD, i get this error on tty4 and it freezes: kernel: Losing some ticks...checking if CPU frequency changed. I have already tried apci=off and SafeSettings. Then i loaded the default Bios settings, and took out my PCI modem, disabled onboard Audio and Lan. Memtest ran 12h and its ok. Has anyone ideas how i could solve this?! FTP or NFS install freezes with the same error. Thanks a lot, Mario
Mario Ohnewald wrote:
Hello List,
i have a K7S8X ASROCK motherboard, 256MB ram and an AMD Duron 1.6Ghz. When i try to install suse9.2 from a FTP-DVD, i get this error on tty4 and it freezes: kernel: Losing some ticks...checking if CPU frequency changed.
I have already tried apci=off and SafeSettings. Then i loaded the default Bios settings, and took out my PCI modem, disabled onboard Audio and Lan. Memtest ran 12h and its ok. Has anyone ideas how i could solve this?! FTP or NFS install freezes with the same error.
Whenever someone has a weird error that doesn't seem to have a cause, I always suggest trying a new power supply. If the voltage at the clock generator has fallen too low, as with any solid state device, its performance will become erratic, and lost ticks is the first thing I would expect to see. If that doesn't work, your only hope might be to sacrifice a chicken at dawn on the Vernal Equinox!! :-)
On Wed, 2005-02-02 at 20:21, Darryl Gregorash wrote:
Mario Ohnewald wrote:
Hello List,
i have a K7S8X ASROCK motherboard, 256MB ram and an AMD Duron 1.6Ghz. When i try to install suse9.2 from a FTP-DVD, i get this error on tty4 and it freezes: kernel: Losing some ticks...checking if CPU frequency changed.
I have already tried apci=off and SafeSettings. Then i loaded the default Bios settings, and took out my PCI modem, disabled onboard Audio and Lan. Memtest ran 12h and its ok. Has anyone ideas how i could solve this?! FTP or NFS install freezes with the same error.
Whenever someone has a weird error that doesn't seem to have a cause, I always suggest trying a new power supply. If the voltage at the clock generator has fallen too low, as with any solid state device, its performance will become erratic, and lost ticks is the first thing I would expect to see.
stillt he same error, with a diffrent power supply. It always freezes when it has done 99% or 100% or formating the partitions. Any further ideas? Thanks, Mario
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Mario Ohnewald wrote: | stillt he same error, with a diffrent power supply. | It always freezes when it has done 99% or 100% or formating the | partitions. | | Any further ideas? Lost ticks indicates something seriously wrong at the system core -- it could even be a marginal/off-frequency crystal oscillator. Here's my checklist: 1. cpu temp./stability: fans, heat sinks, overclocking via the BIOS? 2. memory quality & timing settings in BIOS? x. power supply (done) If these check out but the problem persists, I recommend a Timex motherboard! :-) :-) :-) [sorry. couldn't resist] If those check out, the only things relevant left to look at critically are the cpu & chipset & main board. good luck! - - Carl - -- ____________________________________________________________________ C. E. Hartung Business Development & Support Services http://www.cehartung.com/ carlh@cehartung.com Dover Foxcroft, Maine, USA Public Key #0x68396713 Reg. Linux User #350527 http://counter.li.org/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) iD8DBQFCAT4musxgymg5ZxMRApyUAJ9V7E66AHQnIaYN5UorlFZ6kgAzagCfQ94C u4kPgncbnWp5oYOVJ/VBuQY= =fI5U -----END PGP SIGNATURE-----
Mario, you don't need to cc me on your messages. They just arrive in the same folder as traffic from the mailing list, due to my filter constructions. Carl E. Hartung wrote:
Mario Ohnewald wrote:
| stillt he same error, with a diffrent power supply. | It always freezes when it has done 99% or 100% or formating the | partitions. | | Any further ideas?
Lost ticks indicates something seriously wrong at the system core -- it could even be a marginal/off-frequency crystal oscillator. Here's my checklist:
1. cpu temp./stability: fans, heat sinks, overclocking via the BIOS? 2. memory quality & timing settings in BIOS? x. power supply (done)
OK, now I don't have to suggest these :-) But the arrival of your message was very timely -- it allowed me to think of wrong CPU core voltage. Devastating for the system, particularly if set too high. In addition to potentially damaging the CPU, too high a core voltage should also have the same effect as overclocking the CPU only, but leaving the rest of the system speeds unchanged. That should look like we are losing ticks. Clark's message also makes me wonder if in the 2.6 kernels, tolerances have suddenly become very strict. I hope not, as this would suddenly shut out a great deal of the lower-end hardware, and with it a huge number of potential Linux users.
If these check out but the problem persists, I recommend a Timex motherboard! :-) :-) :-) [sorry. couldn't resist]
Sacrificing the chicken has a better chance of working :-)
On Wednesday 02 February 2005 15:49, Mario Ohnewald wrote:
On Wed, 2005-02-02 at 20:21, Darryl Gregorash wrote:
Mario Ohnewald wrote:
Hello List,
i have a K7S8X ASROCK motherboard, 256MB ram and an AMD Duron 1.6Ghz. When i try to install suse9.2 from a FTP-DVD, i get this error on tty4 and it freezes: kernel: Losing some ticks...checking if CPU frequency changed.
Mario, For your info, and don't know if this could be the problem. I used to get the exact same message on my boot message. Further on down I would get a "many lost ticks" message. Found it trying to troubleshoot wildly varying time settings. Turned out to be the motherboard. Was brand new. Complained to the manufacturer and they replaced it (different brand of mobo than yours) No problems since then. Hope that's not your problem. Just so you know. Bob S.
I have already tried apci=off and SafeSettings. Then i loaded the default Bios settings, and took out my PCI modem, disabled onboard Audio and Lan. Memtest ran 12h and its ok. Has anyone ideas how i could solve this?! FTP or NFS install freezes with the same error.
Whenever someone has a weird error that doesn't seem to have a cause, I always suggest trying a new power supply. If the voltage at the clock generator has fallen too low, as with any solid state device, its performance will become erratic, and lost ticks is the first thing I would expect to see.
stillt he same error, with a diffrent power supply. It always freezes when it has done 99% or 100% or formating the partitions.
Any further ideas?
Thanks, Mario
On Wednesday 02 February 2005 15:14, Mario Ohnewald wrote:
Hello List,
i have a K7S8X ASROCK motherboard, 256MB ram and an AMD Duron 1.6Ghz. When i try to install suse9.2 from a FTP-DVD, i get this error on tty4 and it freezes: kernel: Losing some ticks...checking if CPU frequency changed.
I have already tried apci=off and SafeSettings. Then i loaded the default Bios settings, and took out my PCI modem, disabled onboard Audio and Lan. Memtest ran 12h and its ok. Has anyone ideas how i could solve this?! FTP or NFS install freezes with the same error.
It doesn't have to be dangerous. In the kernel source we find /* sanity check to ensure we're not always losing ticks */ if (lost_count++ > 100) { printk(KERN_WARNING "Losing too many ticks!\n"); printk(KERN_WARNING "TSC cannot be used as a timesource. \n"); printk(KERN_WARNING "Possible reasons for this are: \n"); printk(KERN_WARNING " You're running with Speedstep, \n" ); printk(KERN_WARNING " You don't have DMA enabled for yo ur hard disk (see hdparm),\n"); printk(KERN_WARNING " Incorrect TSC synchronization on an SMP system (see dmesg).\n"); printk(KERN_WARNING "Falling back to a sane timesource n ow.\n"); clock_fallback(); } /* ... but give the TSC a fair chance */ if (lost_count > 25) cpufreq_delayed_get(); and cpufreq_delayed_get is what prints the message you see. It could be from many possible sources, not all of them involving fried hardware
Anders Johansson wrote:
On Wednesday 02 February 2005 15:14, Mario Ohnewald wrote:
Hello List,
i have a K7S8X ASROCK motherboard, 256MB ram and an AMD Duron 1.6Ghz. When i try to install suse9.2 from a FTP-DVD, i get this error on tty4 and it freezes: kernel: Losing some ticks...checking if CPU frequency changed.
I have already tried apci=off and SafeSettings. Then i loaded the default Bios settings, and took out my PCI modem, disabled onboard Audio and Lan. Memtest ran 12h and its ok. Has anyone ideas how i could solve this?! FTP or NFS install freezes with the same error.
It doesn't have to be dangerous. In the kernel source we find
/* sanity check to ensure we're not always losing ticks */ if (lost_count++ > 100) { printk(KERN_WARNING "Losing too many ticks!\n"); printk(KERN_WARNING "TSC cannot be used as a timesource. \n"); printk(KERN_WARNING "Possible reasons for this are: \n"); printk(KERN_WARNING " You're running with Speedstep, \n" ); printk(KERN_WARNING " You don't have DMA enabled for yo ur hard disk (see hdparm),\n"); printk(KERN_WARNING " Incorrect TSC synchronization on an SMP system (see dmesg).\n"); printk(KERN_WARNING "Falling back to a sane timesource n ow.\n");
clock_fallback(); } /* ... but give the TSC a fair chance */ if (lost_count > 25) cpufreq_delayed_get();
and cpufreq_delayed_get is what prints the message you see. It could be from many possible sources, not all of them involving fried hardware
I see this message on x86_64 laptop with 9.2 x86_64 installed, but the time is rock solid on 2.6.10-ac8, but on AMD XP2800+/XP3000+ boxes with 2.6.10, I'm seeing quite bad time drift without the message. Playing around with values of tickadj can minimise the drift, but it's very hit and miss. Regards Sid. -- Sid Boyce .... Hamradio G3VBV and Keen Flyer =====ALMOST ALL LINUX USED HERE, Solaris 10 SPARC is just for play=====
participants (6)
-
Anders Johansson -
B. Stia -
Carl E. Hartung -
Darryl Gregorash -
Mario Ohnewald -
Sid Boyce