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Old 05-11-05, 01:58 AM   #1
timonoj
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Default what the smp stands for?

I mean, i know it's for symmetric multiproccessing... The thing i'm not sure about is wether i should install the 686 kernel header or the 686-smp one... I've got a PIV 3.20Ghz with HT :?
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Old 05-11-05, 05:28 AM   #2
harl
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Default Re: what the smp stands for?

If you want to take benefict from HyperThreading
and see two virtual CPU's
Then yes you shuld a Kernel with SMP
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Old 05-11-05, 06:23 AM   #3
blueworm
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Default Re: what the smp stands for?

Why dont you try with and without SMP enabled. Run a few benchmarks and then post the results here.
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Old 05-11-05, 04:30 PM   #4
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Default Re: what the smp stands for?

Hyperthreading != SMP last time I checked. Can we get any linkage that suggests a single hyperthreaded CPU can manifest SMP?
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Old 05-11-05, 04:36 PM   #5
timonoj
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Default Re: what the smp stands for?

Not really...I just made the association. That's because i was asking. btw, i've seen some other forums, where some pple with PV HT tried so, and in the best of the cases, they run onto a slower kernel or program. In the worst ones, the computer won't load linux, or will behavior unpredictibly...
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Old 05-12-05, 03:59 AM   #6
harl
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Default Re: what the smp stands for?

Quote:
Originally Posted by ricercar
Hyperthreading != SMP last time I checked. Can we get any linkage that suggests a single hyperthreaded CPU can manifest SMP?
What do you think Hyperthreading is?

I have use SMP kernels since I have my P4 HT and allways see the two
cirtual CPU's. (and take advantage for that)

Also if you recomplie the kernel with SMP support you can activate the
option for HT schedule so the kernel can take beter use of the "second CPU"

http://www.intel.com/techtrends/tech...tm?iid=search&
http://www-106.ibm.com/developerwork...library/l-htl/
Quote:
The Intel Xeon processor introduces a new technology called Hyper-Threading (HT) that, to the operating system, makes a single processor behave like two logical processors.
Quote:
Listing 1. Output from cat /proc/cpuinfo showing Hyper-Threading support


processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 1
model name : Intel(R) Genuine CPU 1.60GHz
stepping : 1
cpu MHz : 1600.382
cache size : 256 KB
. . .
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
bogomips : 3191.60
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 1
model name : Intel(R) Genuine CPU 1.60GHz
stepping : 1
cpu MHz : 1600.382
cache size : 256 KB
. . .
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
bogomips : 3198.15

Last edited by harl; 05-12-05 at 04:10 AM.
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