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Old 07-31-2005, 09:58 PM   #1
vuzerak
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HyperThreading not working in RH9


We have two Linux RH9 servers working on MSI i875neo MoBo with P4 2.4c HT 800mhz bus 2GB DDR 400 RAM and HT is running great.

We've just built our third Linux RH9 server with P4S800D-X instead of MSI MoBo, all the rest being the same, e.g. P4 2.4c HT 800 mhz bus 1GB DDR 400 but we never got to see two processors running.

We went thru all BIOS setup and have HyperThreading function enabled plus Hyper Streaming enabled.

We tried switching one on and the other off and vice-versa but no matter what combination, it never got us two process running.

RH9 is updated via RHN and has 2.4.20-31.9 smp Kernel

I've checked /proc/cpuinfo and you see ht flag, but also can see cpu=o

I read in some forum about installing and/or patching for ACPI but as a matter of fact, I did EXACTLY the same installation process as I did with the other MSI boards, and I can see two cpus on them even with an older Kernel 2.4.20-8 smp

Does this picture looks familiar to anyone?

Side Note: I wouldn't be surprised if solution is a silly one, for I am as Newbie in Linux as it can possibly be...
 
Old 07-31-2005, 11:30 PM   #2
Matir
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Have you tried running a LiveCD of some sort and seeing if it can see 2 processors? Perhaps one with a 2.6 kernel? It's possible there's some sort of ht-2.4-mobo incompatibility going on there.
 
Old 08-01-2005, 12:02 AM   #3
duffmckagan
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Support for the Intel Hyper threading Technology was included just in the 2.4.18 kernel.

You are using the 2.4.20 kernel, which may not be that improved for HT Technology.

Can you use a more developed 2.6 kernel?
 
Old 08-01-2005, 12:05 AM   #4
duffmckagan
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You may read this article as well.

Hyper-Threading In Linux
 
Old 08-01-2005, 09:18 AM   #5
brfsa
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Why RH9??? it's soo outdated.
kernel 2.4.20 is old for HT. like the other guy said

Go for the best distro, Gentoo!
Fast, extreme-security, estable and always updated
 
Old 08-01-2005, 09:24 AM   #6
duffmckagan
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Quote:
Go for the best distro, Gentoo!
Fast, extreme-security, estable and always updated
It is always a personal choice.
Red Hat is quite good. Can't compare it with Gentoo.
The user can instead go with Fedora Core, which is the same, just an Upgrade.



PS: In simple words, can you tell me how much time it takes to compile Gentoo with KDE, GNOME with stage3 tarballs?
 
Old 08-01-2005, 09:37 AM   #7
brfsa
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You are right, it is a personal matter of choice... and needs...

anyways,
as you can see, I have an Athlon 2000+ with 512 Ram...
I do not use Swap space, and I use only gnome, no KDE... (I like it fast)

I compile my system from a stage 3 tarball back to stage 1.

I took me about 4 days to get into xwindows.
I did many mistakes at first... and I compiled gcc on top of gcc.

compiling took 40 hours total...

I have Gnome, apache, all media for video, music and picture... office, p2p, and a lot of other software...
what toke a lot of time is OpenOffice(6 hours), firefox (1hour) and Glibc(more than 8 hours)

nothing for KDE thou, only apps for gnome (or that supports gnome)

Last edited by brfsa; 08-01-2005 at 09:45 AM.
 
Old 08-01-2005, 09:43 AM   #8
brfsa
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I did a server a while ago, no X, no GTK, no multimedia...
only apache, php, mysql,ssl, ssh, ftp, network tools and bla bla bla, all the things a server needs


it took one day only... and it is sooo fast and secure... with glsa-check tool!!!
everyday auto-update cron...


All from source*
 
Old 08-01-2005, 09:47 AM   #9
duffmckagan
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Thanks for the Info man.

40 Hours total is damn.....i can't believe it. I got frustrated and cancelled the compilation of KDE, i waited one long hour.

Hehe.....I will try Gentoo some other day when i find time.
Lets not deviate from the main topic.



Back to RED HAT.
 
Old 08-01-2005, 09:54 AM   #10
brfsa
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sure, not deviate from main topic

by the way, kde should compile in more than double the time as gnome takes... it is worth it compilling from source...

cheers

Last edited by brfsa; 08-01-2005 at 09:59 AM.
 
Old 08-01-2005, 09:58 AM   #11
duffmckagan
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Thanks for your comments.
 
  


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