06-24-2008
How to enable multiprocessor in RHEL5.1
I just noticed from /proc/cpuinfo, it only show up 1 processor. We have at least 8 processors. How can I enable all these processors in RHEL 5.1?
cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Genuine Intel(R) CPU @ 0000 @ 2.40GHz
stepping : 2
cpu MHz : 2400.147
cache size : 8192 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
fpu : yes
fpu_exception : yes
cpuid level : 11
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 syscall nx rdtscp lm constant_tsc up pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips : 4880.44
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
Please help.
Thanks alot.
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LEARN ABOUT CENTOS
x86info
x86info(1) General Commands Manual x86info(1)
NAME
x86info -- display x86 CPU diagnostics
SYNOPSIS
x86info [-a] [-c] [-f] [fB-F] [-m] [-mhz] [-r] [?] [--all] [--cache] [--flags] [--verbose] [--msr] [--mhz] [--registers]
[--help]
DESCRIPTION
This manual page documents x86info, a program which displays a range of information about the CPUs present in an x86 system.
In order to make full use of this program you need to have the CPU ID and MSR device drivers in your kernel with accessible device files
/dev/cpu/<n>/cpuid and /dev/cpu/<n>/msr.
OPTIONS
This program follows the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included
below.
? --help
Show summary of options.
-a --all
Show all information. Equivalent to -c -f -m -r -mhz.
-c --cache
Show TLB, cache sizes and cache associativity.
-f --flags
Show CPU feature flags.
-m --msr
Dump model specific registers. This feature is currently only supported on a few different processors. Future versions will
include parsing of bits in MSRs for all processors.
-mhz --mhz
Estimate current clock rate.
-mp --mptable
Dump MP table showing CPUs BIOS knows about.
-r --registers
Show register values from all possible cpuid calls.
-s --show-machine-check
Show machine check exception information.
-v --verbose
Show verbose descriptions.
AUTHOR
x86info was written by Dave Jones <davej@redhat.com>.
This manual page was written by Mark Brown <broonie@debian.org> for the Debian GNU/Linux system (but may be used by others).
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License version 2.
x86info(1)