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Old 05-02-2008, 02:03 PM   #1
rdabra
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Registered: Sep 2005
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Thumbs up distro for bi-processed machine


i've just bought a bi-processed intel quad-core machine. Could anynone inform me if distros like Kubuntu or Suse 10.3 work fine with eight cores ?
 
Old 05-02-2008, 03:04 PM   #2
GrapefruiTgirl
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Hi there.

It is not really the distro which determines how well Linux will or will not work with n cores on a machine, but the kernel itself. The Linux kernel, which is the heart of any/all Linux distros, is where the number of cores available is to be configured.
Most modern distros and kernel configurations are designed for SMP, that is "Symmetric Multi Processing", meaning they will by default generally have no problem with a dual core machine (or maybe even more cores by default). Hyper threading is also supported.
Chances are good, Kubuntu and SuSE both include an SMP kernel. However, in order to be sure that your system will make use of all 8 cores in some sort of useful fashion, you will almost certainly want to recompile the kernel you end up using, and configure it specifically for 8 cores.

If you already have a Linux CD or DVD, and you boot it up or install it, look into the log file /var/log/dmesg (on most distros) or in a console, type 'dmesg' and you will be able to see how many cores (CPUs) were brought up during boot. If it sees all 8, then you have nothing really to worry about. Otherwise, again you should rebuild the kernel and tell it there are 8 cores.

Sasha
 
Old 05-02-2008, 04:54 PM   #3
rdabra
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thanx

Sasha, thank you very much.
 
Old 05-02-2008, 10:55 PM   #4
jsurles
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Quote:
Originally Posted by rdabra View Post
Sasha, thank you very much.
You can also look at /proc/cpuinfo


[root@sloth:~>cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU @ 2.40GHz
stepping : 7
cpu MHz : 2394.126
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
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 syscall lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 4791.68
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU @ 2.40GHz
stepping : 7
cpu MHz : 2394.126
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
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 syscall lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 4788.35
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU @ 2.40GHz
stepping : 7
cpu MHz : 2394.126
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 2
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
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 syscall lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 4788.36
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Quad CPU @ 2.40GHz
stepping : 7
cpu MHz : 2394.126
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 3
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
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 syscall lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 4788.36
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
 
  


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