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Full Discussion: Dual CPU's and 'top'
Top Forums UNIX for Dummies Questions & Answers Dual CPU's and 'top' Post 38298 by hcclnoodles on Friday 11th of July 2003 06:56:40 AM
Old 07-11-2003
Dual CPU's and 'top'

Hi have just built a new sunfire 280r with solaris 9 and i Have 2 questions

1) where can i view some information that will tell me for definate that the 2*900 mhz processors are both being used, i tried using "top" but it doesnt tell me for sure that both processors are churning away together

2) Our company uses SAS which is like a statistics number crunching app, when the SAS guys run a job, It is supposed to utilise the wonderful new dual 900mhz processors, but when i open "top" the SAS processes are using under 5% (if im lucky !). The interesting thing is that along the top of the "top" screen it says

CPU States -5% idle- 1% user - 3% Kernel- 95% iowait - 0% swap

can anybody tell me why iowait is at 95% and what the hell does it mean anyway !!!? . This box is running nothing but SAS and O/S associated processes, and the data it is sourcing is on the same box, so there are no NFS data access issues So why are my processes using hardly any CPU ?

any help on this would be greatly appreciated
 

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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 accessable 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 --cacheinfo 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-bluesmoke Show machine check exception information. -v --verbose Show verbose descriptions. AUTHOR
x86info was written by Dave Jones <davej@suse.de>. 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 Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. x86info(1)
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