Ask Linux.com: Historical Linux, hardware for tomorrow
11-08-2008 07:00 AM
It's all about bipartisanship and unity in this week's roll call for the Linux.com forums. Old distro and new distro coming together, peripheral and computer learning how to work as one, and, just as the framers intended, a run-off between several distinguished "absentee answer" questions.
Hello,
I am working on a Perl script to run from an AIX Nim server to extract hardware errors from our Linux server using various forms of grep statements -
I have all my hosts in a text file and a command is run from the nim server to each host to pull out data from /var/log/messages and... (5 Replies)
We have run software on Dell Servers w/ Windows and seen the performance degrade overtime. We switched to an IBM server w/ AIX and have not seen the same performance degradation over time. In fact, the IBM servers are at least five years old and continue to preform well at the same level.
How... (2 Replies)
Dear All,
I have developed one application in the Qt Creator. I have one requirment for get hardward information in the Linux system, Then i try dmidecode using and run in Qt.It will occur error message for "dev/mem" permission denied". So i try to terminal to run sudo ./application. it will ask... (1 Reply)
I would like to configure a bare minimum Linux with internet browser on a system with Flash & RAM (but no harddisk or any other nonvolatile storage). Please advise. (5 Replies)
Hello,
I have Win NT server running and I want to know how can I get Hardware RAID settings without rebooting the server?
Thanks in advance. (2 Replies)
Before posting questions about Linux hardware, it is a good idea to check the Linux Hardware HOWTO guide (Last Update: 2007-05-22)
However, this HOWTO has not been maintained since 2007 and it out-of-date. (0 Replies)
I'm really new to this and I want to learn UNIX/LINUX and saw the post about setting up a server to use everyday to practice. I have an old 386 PC and a 486 PC sitting around. Can they be reformatted and used to run UNIX/LINUX on as a network. (4 Replies)
CHCPU(8) User Manuals CHCPU(8)NAME
chcpu - configure CPUs
SYNOPSIS
chcpu [-e] [-d] [-c] [-g] cpu-list
chcpu [-p] mode
chcpu -r
chcpu [-h] [-V]
DESCRIPTION
chcpu can modify the state of CPUs. It can enable or disable CPUs, scan for new CPUs, change the CPU dispatching mode of the underlying
hypervisor, and request CPUs from the hypervisor (configure) or return CPUs to the hypervisor (deconfigure).
Some options have a cpu-list argument. Use this argument to specify a comma-separated list of CPUs. The list can contain individual CPU
addresses or ranges of addresses. For example, 0,5,7,9-11 makes the command applicable to the CPUs with the addresses 0, 5, 7, 9, 10, and
11.
OPTIONS -r, --rescan
Trigger a rescan of CPUs. Use this option on systems that do not automatically detect newly attached CPUs. The Linux kernel then
recognizes the new CPUs.
-c, --configure cpu-list
Configure all specified CPUs. Configuring a CPU means that the hypervisor takes a CPU from the CPU pool and assigns it to the vir-
tual hardware on which your kernel runs.
-e, --enable cpu-list
Enable all specified CPUs. Enabling a CPU means that the kernel sets it online. A CPU must be configured, see -c, before it can be
enabled.
-p, --dispatch mode
Set the CPU dispatching mode (polarization). This option has an effect only if your hardware architecture and hypervisor support
CPU polarization. Available modes are:
horizontal The workload is spread across all available CPUs.
vertical The workload is concentrated on few CPUs.
-d, --disable cpu-list
Disable all specified CPUs. Disabling a CPU means that the kernel sets it offline.
-g, --deconfigure cpu-list
Deconfigure all specified CPUs. Deconfiguring a CPU means that the hypervisor removes the CPU from the virtual hardware on which
the Linux instance runs and returns it to the CPU pool. A CPU must be offline, see -d, before it can be deconfigured.
-h, --help
Display help information and exit.
-V, --version
Display version information and exit.
AUTHOR
Heiko Carstens <heiko.carstens@de.ibm.com>
COPYRIGHT
Copyright IBM Corp. 2011
SEE ALSO lscpu(1)AVAILABILITY
The chcpu command is part of the util-linux package and is available from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util-
linux/>.
Linux June 2012 CHCPU(8)
