11-18-2013
Actually, from a vm guest, this can be quite difficult. I mean, in most cases for most all hypervisor, any and all CPUs are virtual. The actually allocation given to a VM is often times only known to the hypervisor host itself and not to the guest.
On a physical box, it all depends.
If you have contemporary CPUs, and you have a relatively contemporary Linux, /proc/cpuinfo will likely show what you want. However, if you have older CPUs and/or older Linux, the information could be very inaccurate.
In your case, and this is a guess, looks like you've been assigned one virtual CPU.... what that means though, isn't well defined.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
What command can i use to get the physical and virtual memory of a database? (7 Replies)
Discussion started by: tads98
7 Replies
2. UNIX for Advanced & Expert Users
Have a p570 LPAR capped/smt set to 4 physical processors. And currently have virtual processors set to 6 which gives 12 logical processors at AIX. This is for an Oracle9i database server running 4 instances.
What should virtual processors be set to? at least initially?
And how to determine when... (3 Replies)
Discussion started by: guttew
3 Replies
3. HP-UX
Hi,
I have two questions here.
I need to find out the number of physical processors the HP-UX operating system is running in. Here i am referring to the physical processors in a system and not the number of cores.
I can get the number of cores using the command 'ioscan -fnkC processor'.... (7 Replies)
Discussion started by: shawshank
7 Replies
4. UNIX for Dummies Questions & Answers
Hi all,
I am new to Linux kernel/user space programming having been an assembly programmer in my previous life. I am now using 2.6.x kernel on an embedded CPU that has a few dedicated hardware blocks (including more CPU running just C-code, i.e., no operating system).
There is a single DRAM... (1 Reply)
Discussion started by: agaurav
1 Replies
5. Solaris
Hi,
I am on an Solaris machine "SunOS 5.10 Generic_139556-08 i86pc i386 i86pc"..how do i check if I am on an physical or an virtaul server.
Thanks. (6 Replies)
Discussion started by: jjoy
6 Replies
6. AIX
First of all I have performed a Google search and internal search and found several descriptions but nothing I can wrap my head around and feel 100% confident about.
I feel really silly for asking this as I manage a P6 570 with 12 lpars but I have difficulity with Virtual Processors.
I can... (3 Replies)
Discussion started by: juredd1
3 Replies
7. AIX
Hi,
on redhat linux 5.5 (IBM PPC) os, whenever I am running the command top, it is showing 8 cpu.
Processing Units
Property Current Pending
Minimum 0.1
Assigned 0.8
Maximum 1
Virtual Processors
Property Current Pending
Minimum 1
Assigned 4 ... (1 Reply)
Discussion started by: manoj.solaris
1 Replies
8. UNIX for Advanced & Expert Users
Hi All,
How can I know whether the server I am connecting to is a virtual or physical one? The server might be having any Unix OS (Linux/Solaris/HP-UX etc.).
Is there any system files / commands which can show these concrete information?
Thanks in advance for the replies.
sanzee (1 Reply)
Discussion started by: sanzee007
1 Replies
9. Solaris
hi,
I am using command psrinfo -p to check the number of physical processors present on any soalris machine.I want to check the number of virtual processors assigned for particular solaris machine.
which command/set of command need to be used which can grep or show the total virtual processors... (8 Replies)
Discussion started by: omkar.jadhav
8 Replies
10. AIX
HI,
I need a command to find,
1) Avaiable Physical CPU
2) Avaiable virtual CPU
TIA (1 Reply)
Discussion started by: sumanthupar
1 Replies
CHCPU(8) System Administration CHCPU(8)
NAME
chcpu - configure CPUs
SYNOPSIS
chcpu -c|-d|-e|-g cpu-list
chcpu -p mode
chcpu -r|-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
-c, --configure cpu-list
Configure the 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.
-d, --disable cpu-list
Disable the specified CPUs. Disabling a CPU means that the kernel sets it offline.
-e, --enable cpu-list
Enable the specified CPUs. Enabling a CPU means that the kernel sets it online. A CPU must be configured, see -c, before it can be
enabled.
-g, --deconfigure cpu-list
Deconfigure the 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.
-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.
-r, --rescan
Trigger a rescan of CPUs. After a rescan, the Linux kernel recognizes the new CPUs. Use this option on systems that do not auto-
matically detect newly attached CPUs.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
RETURN CODES
chcpu has the following return codes:
0 success
1 failure
64 partial success
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 <https://www.kernel.org/pub/linux/utils
/util-linux/>.
util-linux July 2014 CHCPU(8)