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Full Discussion: How to interpret TOP
Top Forums UNIX for Dummies Questions & Answers How to interpret TOP Post 302319036 by Rhije on Saturday 23rd of May 2009 12:21:43 PM
Old 05-23-2009
You can't find it? Did you possibly delete the man pages from the system? Or just that one?

Code:
%CPU  --  CPU usage
          The  taskâs  share of the elapsed CPU time since the last screen update, expressed as a percentage of total CPU time.  In a true SMP
          environment, if âIrix modeâ is Off, top will operate in âSolaris modeâ where a taskâs cpu usage will be divided by the total  number
          of CPUs.  You toggle âIrix/Solarisâ modes with the âIâ interactive command.

Copied directly from the man page on 'top'. It is the second section of the man page, specificaly 2a "2. FIELDS / Columns - 2a. DESCRIPTIONS of Fields".

Just testing really quick on a CentOS 5.2 box, using top cd1 I noticed something at between 80 and 100 on cpu. So I did shift + i (capital i), and it turned Irix mode off (apparently it is on by default), and then it showed the usage of those at about 12% or so. Yeah..
 

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CPUSET(3)						   BSD Library Functions Manual 						 CPUSET(3)

NAME
cpuset_create, cpuset_destroy, cpuset_zero, cpuset_set, cpuset_clr, cpuset_isset, cpuset_size -- dynamic CPU sets SYNOPSIS
#include <sched.h> cpuset_t * cpuset_create(void); void cpuset_destroy(cpuset_t *set); void cpuset_zero(cpuset_t *set); int cpuset_set(cpuid_t cpu, cpuset_t *set); int cpuset_clr(cpuid_t cpu, cpuset_t *set); int cpuset_isset(cpuid_t cpu, const cpuset_t *set); size_t cpuset_size(const cpuset_t *set); DESCRIPTION
This section describes the functions used to create, set, use and destroy the dynamic CPU sets. This API can be used with the POSIX threads, see pthread(3) and affinity(3). The ID of the primary CPU in the system is 0. FUNCTIONS
cpuset_create() Allocates and initializes a clean CPU-set. Returns the pointer to the CPU-set, or NULL on failure. cpuset_destroy(set) Destroy the CPU-set specified by set. cpuset_zero(set) Makes the CPU-set specified by set clean, that is, memory is initialized to zero bytes, and none of the CPUs set. cpuset_set(cpu, set) Sets the CPU specified by cpu in set. Returns zero on success, and -1 if cpu is invalid. cpuset_clr(cpu, set) Clears the CPU specified by cpu in the CPU-set set. Returns zero on success, and -1 if cpu is invalid. cpuset_isset(cpu, set) Checks if CPU specified by cpu is set in the CPU-set set. Returns the positive number if set, zero if not set, and -1 if cpu is invalid. cpuset_size(set) Returns the size in bytes of CPU-set specified by set. SEE ALSO
affinity(3), pset(3), sched(3), schedctl(8), kcpuset(9) HISTORY
The dynamic CPU sets appeared in NetBSD 5.0. BSD
November 2, 2011 BSD
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