Miscellaneous > Technical Support

System time runs twice normal speed on FC4 SMP kernel

(1/3) > >>

H_TeXMeX_H:
On my desktop:

Pentium 4 HT 3.02 Ghz
1 GB RAM
SiS chipset
Nvidia GeForce 4 Ti graphics card

The system time runs twice as fast as normal running the Fedora Core 4 SMP kernel and Hyper-threading support on (2 seconds system time = 1 second real time). The problem goes away if I turn HT off and go to non-SMP kernel ... but it runs 20-40% slower than with HT on and SMP, so I leave HT on and use SMP. It doesn't bother me too much, with a few exceptions such as the delay times are all 1/2 as long as they should be so if I hold a key down for just a bit too long it'll quickly fill the page with that character, and hotkeys are problem like when I want a terminal it's hard to get just 1 terminal to pop up ... usually 10-20 pop up :( Anyway ... I've posted this question in other places and it looks like it happens on other distros as well ... like Ubuntu and Suse and others, and that there is no real solution ... it just a kernel bug. I hope this is not the case :( I don't have access to my desktop right now ... it's at my other house ... so I can't try out things to see if they work, but as soon as I get access I'll try to implement the solutions ... maybe I could set up some remote desktop stuff.

Lead Head:
I have even heard of similar bugs with Windows and hyper thread, to me it looks like you are going to have to live without HT and SMP:(

piratePenguin:
Sounds like a major kernel bug.
I'd try compiling 2.6.16 (just released today). There's new SMP fixes in basically every linux release...

Do all people with P4 HT have this problem?

WMD:

--- Quote from: piratePenguin ---Do all people with P4 HT have this problem?
--- End quote ---

Not me.

Aloone_Jonez:
Cool, does everything else run at twice the speed? :D

Navigation

[0] Message Index

[#] Next page