CPU to core mapping

10 More Discussions You Might Find Interesting

1. Solaris

Assigning cpu/core to globalzone

hi all, I am running SPARC server + solaris 10. (no LDOMs) Due to change of setup and application licensing cost, I need to cap my core/cpu utilization in my globalzone. Right now, I have 1x6 cores in my server, how do I change it to utilized 4 cores instead ? By using...

2. Shell Programming and Scripting

Core and cpu information of HP-UX machine

Hi All, i am trying to retrive below information from any hp-ux machine (physical & virtual both): 1.Processor Total Count: 2.Processor Core Count: 3.Processor type: 4.number of physical processors: 5 number of virtual processors: i am trying to use command 'print_manifest' as...

3. Red Hat

No of CPU's and No of Core

I would like to understand how many number of CPUs and cores do I have on my server based on following out put.. Few observations... Please correct me if I am wrong Since Physical ID is same CPU is singe It has 8 virtual processors Hyper thrading is enabled since no of siblings are...

4. Solaris

Share CPU core

Hi, I have 2 physical processor UltraSPARC-T2 with 32 virtual processors I want to execute a perl program on 10 virtual processors. I try prset command, but I don't see a difference. psrset -c "created processor set 2" 1 2 3 4 5 6 7 8 9 10" psrset -b 2 `pgrep program.pl` Maybe...

5. AIX

What is a cpu core ?

Hi Friends- What does it mean by 2 cpu cores, 3 cpu cores? Does it mean 2 separate cpus or what is it exactly ? Kindly explain a bit in detail. Thanks panditt

6. Solaris

Restricting CPU Core Access

Hi all. I've had a quick look around but cant see anything exactly matching my requirements. I have a new T2000 running S10. Im looking to restrict the no. cores that a S10 non-global zone can use to 1 only. The box is single CPU but 8core. I want to do this to save on some software...

7. UNIX for Advanced & Expert Users

Distinguishing between CPU and Core

Hi, I want to know if in UNIX is it possible to distinguish between a CPU and a core through any command? Thanks, Vineet

8. UNIX for Advanced & Expert Users

How maney CPU and core?

Hi, Is it a command that show's how many CPU and Core the solaris server have? Tnx

9. AIX

no of core in cpu for aix

is there command which will display no of core per cpu in aix? Regads, Manoj

10. AIX

cpu and core

Hi, what is concept of core in ibm platform? I want to know how to find out no of core in cpu in aix i.e command how to find out value of core? Wheather any specification is there?

LEARN ABOUT X11R4

chcpu

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)

Solaris BigAdmin RSS