Morten Torstensen wrote:
Tru Huynh wrote:
[tru@quadcore ~]$ uname -a
Linux quadcore 2.6.9-42.0.3.ELsmp #1 SMP Fri Oct 6 06:28:26 CDT 2006
x86_64 x86_64 x86_64 GNU/Linux
[tru@quadcore ~]$ grep -A4 processor /proc/cpuinfo
processor : 0
Just take care with more than 8 CPUs, because you need the largesmp
kernel then. Worked on a 8 socket, 16 CPU system where that was a pain
due to binary kernel modules.
Now those machines could be 32 CPU systems... and you could add 8
sockets more. 64 CPUs on Intel platform with commodity hardware. Not
that many years ago that would have been utopia :)
I believe those quad core Xeon "Clovertown" CPUs support hyperthreading
too. which means 2 of them has 16 execution threads if you've enabled
hyperthreading in the BIOS. While many people denigrate
hyperthreading, we've got some Java messaging/database/middleware stuff
that gets a HUGE boost on a older dual xeon* with HT enabled... this is
with 2.8Ghz, 533Mhz FSB, 512K cache Xeons of this flavor:
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.80GHz
stepping : 7
cpu MHz : 2791.038
cache size : 512 KB
physical id : 0
siblings : 2
runqueue : 0
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
bogomips : 5570.56
(repeat for processor 1,2,3)
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