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nmcsween
Guru
Joined: 12 Nov 2003
Posts: 381
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 Posted: Wed Nov 26, 2003 10:50 pm Post subject: The Pentium 4 HT Does It Work? |
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| I've wondered for some time now if the pentium 4 w/"HT" will be recognized in linux as two cpu's? |
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scootersmk
Apprentice
Joined: 17 May 2003
Posts: 186
Location: Knoxville, TN
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| Posted: Wed Nov 26, 2003 10:54 pm Post subject: |
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yes, do a search of the forums for /proc/cpuinfo and there is a thread of a bunch of peoples /proc/cpuinfo files and some of then show the "multi proccessors" from HT. Its pretty cool i think.
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Long live the gentoo forums!!!!! |
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BillyBoy
Tux's lil' helper
Joined: 26 Nov 2003
Posts: 101
Location: USA
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| Posted: Wed Nov 26, 2003 11:59 pm Post subject: |
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My dual Xeon shows four CPUs.
Dual Xeon 2GHz HT 533 FSB
It rocks! |
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theonlymcc
Apprentice
Joined: 16 Sep 2003
Posts: 274
Location: NC
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| Posted: Mon Dec 01, 2003 2:16 am Post subject: |
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I am getting a Dell notebook 3.06GHz with HT for x-mas. I plan on using the latest 2.6 kernel. Since it will be considered two processors do I need to compile with multiprocessors enabled?
** Edit. I pwnt'd myself by putting 30.6 instead of 3.06 **
Last edited by theonlymcc on Mon Dec 01, 2003 9:50 am; edited 1 time in total |
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Moled
l33t
Joined: 09 Jul 2003
Posts: 635
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| Posted: Mon Dec 01, 2003 3:06 am Post subject: |
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yes
| Code: |
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 9
cpu MHz : 3014.873
cache size : 512 KB
physical id : 0
siblings : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips : 5963.77
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 9
cpu MHz : 3014.873
cache size : 512 KB
physical id : 0
siblings : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips : 6012.92
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MacMasta
Guru
Joined: 18 Apr 2002
Posts: 545
Location: Anchorage, AK
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| Posted: Mon Dec 01, 2003 4:03 am Post subject: |
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I know linux (at least 2.6; I seem to remember hearing that somebody backported to 2.4, as well) is HT-aware.
I want to know if it's HT-smart; that is, will it know not to parallelize a process onto both 'halves' of the same CPU? Some benchmarking I've read (and some thinking about it) indicate that with a HT-dumb scheduler, you actually end up going slower, rather than faster.
~Mac~ |
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dabooty
Guru
Joined: 15 May 2003
Posts: 482
Location: Belgium
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| Posted: Mon Dec 01, 2003 9:33 am Post subject: |
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| theonlymcc wrote: | | I am getting a Dell notebook 30.6GHz with HT for x-mas. I plan on using the latest 2.6 kernel. Since it will be considered two processors do I need to compile with multiprocessors enabled? |
hehe, a 30Ghz HT proc, i'll bet that box flies 
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MacMasta
Guru
Joined: 18 Apr 2002
Posts: 545
Location: Anchorage, AK
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| Posted: Mon Dec 01, 2003 6:08 pm Post subject: |
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(But imagine the battery life...)
'Marge, you unplugged my laptop again! Every time you do that, it shuts off!'
~Mac~ |
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nmcsween
Guru
Joined: 12 Nov 2003
Posts: 381
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| Posted: Mon Dec 01, 2003 7:11 pm Post subject: |
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| Think of the heatsink on that baby 3ghz=138w 30ghz=1380w |
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